[0001]The present invention relates to a case member for an engine.
BACKGROUND ART
10 [0002] In recent years, a variable displacement oil pump capable of changing a discharge
characteristic by electrically controlling the oil pump has been adopted. Since the oil pump
sucks oil stored in an oil pan, the oil pump is generally disposed in the vicinity of an oil pan
and is driven by a crankshaft.
[0003] When a variable displacement oil pump disclosed in Patent Literature 1 is disposed
15 in the vicinity of an oil pan, a control device such as an electromagnetic valve for electrically
controlling a discharge characteristic of the oil pump is also disposed in the vicinity of the oil
pan.
[0004] On the other hand, the control device needs to be connected to a control unit, a
battery, or the like outside an engine via a harness, but these control unit, battery, or the like
20 are usually disposed at positions on a camshaft side away from the oil pan. In order to
connect to the control device of this variable displacement oil pump, it is easier to connect
when the connector is positioned on the camshaft side.
CITATION LIST
25 PATENT LITERATURE
[0005] Patent Literature 1: JP-A-2015-140670
SUMMARY OF INVENTION
TECHNICAL PROBLEM
30 [0006] However, when a harness extending from the control device is drawn out from the
vicinity of the oil pan to an outside of the engine, when the harness is guided to the camshaft side, the harness may interfere with a peripheral device such as an auxiliary machine driven by the crankshaft.
2

[0007] The present invention has been devised in view of the circumstances in the related
art, and an object of the present invention is to provide a case member for an engine capable of guiding a harness to a position on a camshaft side away from an oil pan without interfering with a peripheral device provided outside an engine.
5
SOLUTION TO PROBLEM
[0008] As one of preferred aspects of the present invention, a harness is disposed along an
inside of a contact portion in an accommodating portion.
[0009] As one of another preferred aspects, a position of the harness inside the
10 accommodating portion is regulated by a convex portion or a concave portion.
ADVANTAGEOUS EFFECTS OF INVENTION
[0010] According to a preferred aspect of the present invention, the harness can be guided
to a position on a camshaft side away from an oil pan without interfering with a peripheral
15 device provided outside an engine.
BRIEF DESCRIPTION OF DRAWINGS
[0011] [FIG. 1] FIG. 1 is a schematic view showing a part of an appearance of an engine.
[FIG. 2] FIG. 2 is an arrow view showing the appearance of the engine when
20 viewed from a direction of an arrow Z in FIG. 1.
[FIG. 3] FIG. 3 is a rear view of a chain case showing an inside of the chain case in a state where a harness, a connector, a pump cover, and an electromagnetic valve are attached.
[FIG. 4] FIG. 4 is a rear view of the chain case showing the inside of the chain case
in a state where a rotor and the like are accommodated.
25 [FIG. 5] (a) of FIG. 5 is a plan view showing an internal state of an oil pump when
the electromagnetic valve is in an energized state, and (b) of FIG. 5 is a plan view showing an internal state of the oil pump when the electromagnetic valve is in a non-energized state.
[FIG. 6] FIG. 6 is a plan view of the oil pump showing a flow of oil in the oil pump.
[FIG. 7] FIG. 7 is a perspective view of the chain case and the like when viewed
30 from an electromagnetic valve side.
[FIG. 8] FIG. 8 is a front view of the chain case and the like showing a portion surrounded by a broken line circle X1 in FIG. 3.
[FIG. 9] FIG. 9 is a perspective view of the chain case and the like showing a
3

portion surrounded by a broken line circle X2 in FIG. 3.
[FIG. 10] FIG. 10 is a cross-sectional view of the chain case and the like cut along a line A-A in FIG. 3.
[FIG. 11] (a) of FIG. 11 is a front view showing a vicinity of a first connector in a
5 state where a guide member is attached, and (b) of FIG. 11 is an arrow view showing the
vicinity of the first connector when viewed from a direction of an arrow C in (a) of FIG. 11.
[FIG. 12] (a) of FIG. 12 is a front view showing the vicinity of the first connector in
a state where the guide member is removed, and (b) of FIG. 12 is an arrow view showing the
vicinity of the first connector when viewed from a direction of an arrow D in (a) of FIG. 12.
10 [FIG. 13] FIG. 13 is a cross-sectional view of the chain case and the like cut along a
line B-B in FIG. 3.
DESCRIPTION OF EMBODIMENTS
[0012] An embodiment of a case member for an engine according to the present invention
15 will be described below with reference to the drawings.
[0013] [Configuration of Engine]
FIG. 1 is a schematic view showing a part of an appearance of an engine 1. FIG. 2 is an arrow view showing the appearance of the engine 1 when viewed from a direction of an arrow Z in FIG. 1. In FIGS. 1 and 2, various components inside the engine 1 are indicated
20 by broken lines.
[0014] The engine 1 is formed as, for example, an in-line four-cylinder engine, and
includes a cylinder block 3 in which a cylinder 84 slidably accommodating a piston 2 is formed. The piston 2 is coupled to a crankshaft 4 via a connecting rod 85. The crankshaft 4 is rotatably supported by a plurality of bearing portions provided in the cylinder block 3.
25 A crank sprocket 5, which is a drive rotating body that rotates integrally with the crankshaft 4,
is fixed to an outer periphery of one end portion of the crankshaft 4.
[0015] A cylinder head 6 is fixed to an upper surface of the cylinder block 3, and a pair of
intake ports 86 and a pair of exhaust ports 87 are formed in the cylinder head 6. A first camshaft 7 that drives an intake valve 88 that opens and closes the intake port 86 and a second
30 camshaft 8 that drives an exhaust valve 89 that opens and closes the exhaust port 87 are
provided on an upper portion of the cylinder head 6. The opening and closing of the intake valve 88 and the exhaust valve 89 are performed by driving the intake valve 88 and the exhaust valve 89 via first and second springs 96 and 97 by first cams 88a and 89a provided on
4

outer peripheral portions of the first and second camshafts 7 and 8. First and second cam
sprockets 9 and 10, which are drive rotating bodies, are fixed to outer peripheries of one end
portions of the first and second camshafts 7 and 8, respectively. A timing chain 11, which is
an endless transmission body, is wound around the crank sprocket 5 and the first and second
5 cam sprockets 9 and 10. The timing chain 11 transmits a rotational force from the crankshaft
4 via the crank sprocket 5 and the first and second cam sprockets 9 and 10 to the first and second camshafts 7 and 8. Instead of the timing chain 11, a timing belt may be used as the endless transmission body. In this case, the timing belt is wound around a first and second cam pulleys and a crank pulley, instead of the first and second cam sprockets 9 and 10 and the
10 crank sprocket 5. The timing chain 11 and the sprockets 5, 9, and 10 are accommodated in a
space between side surfaces of the cylinder block 3 and the cylinder head 6 and a chain case 12 which is a case member that closes the side surfaces.
[0016] Upper surfaces of the cylinder head 6 and the chain case 12 are closed by a head
cover 13.
15 [0017] On the other hand, an oil pan 14 storing lubricating oil that lubricates a sliding
portion of the engine 1 and that serves as a drive source for devices such as a valve timing
control device is attached and fixed to lower surfaces of the cylinder block 3 and the chain
case 12.
[0018] A lower portion of the chain case 12 is provided with an oil pump 15 that is driven
20 by rotation of the crankshaft 4 to supply oil to the above sliding portion and various devices.
That is, the oil pump 15, which is a variable displacement oil pump that supplies oil to the sliding portion and devices such as the valve timing control device in the engine 1, is provided at an end portion 12a in two end portions 12a and 12b of the chain case 12 on a side close to the oil pan 14 in an operating direction of the piston 2 (an up-down direction in FIG.
25 1).
[0019] An electromagnetic valve 16, which is a control device capable of electrically
changing a discharge characteristic of the oil pump 15, is attached to a lower portion of the oil
pump 15. A portion of the electromagnetic valve 16 is disposed in the oil pan 14, and is
connected to a first connector 18 via a harness 17 routed from an inside of the oil pan 14
30 through an inside of the chain case 12 to an upper portion of the chain case 12. The first
connector 18 is provided so that, in a state where a portion is held in an opening portion 19 which is a through hole formed on a side close to the first and second camshafts 7 and 8 in the operating direction of the piston 2 in a first side wall portion 21 of the chain case 12 to be
5

described later, a remaining portion faces an outside of the chain case 12. The first connector 18 is connected to a control unit, a battery, or the like (not shown) via a cable (not shown).
[0020] [Configuration of Chain Case]
5 FIG. 3 is a rear view of the chain case 12 showing the inside of the chain case 12 in
a state where the harness 17, the first connector 18, a pump cover 29, and the electromagnetic
valve 16 are attached. FIG. 4 is a rear view of the chain case 12 showing the inside of the
chain case 12 in a state where a rotor 25 and the like are accommodated.
[0021] The chain case 12 is formed by aluminum die casting using a metal material, for
10 example, an aluminum alloy material. The chain case 12 includes a bottom wall portion 20
having a substantially rectangular plate shape, and first and second side wall portions 21 and 22 rising from both side edges of the bottom wall portion 20. The chain case 12 has an accommodating portion 34 in which the above timing chain 11 and the like can be disposed in a space between the side surfaces of the cylinder block 3 and the cylinder head 6 and the
15 bottom wall portion 20 inside the first and second side wall portions 21 and 22. The first
and second side wall portions 21 and 22 extend continuously for a relatively long distance from the end portion 12a on an electromagnetic valve 16 side to the end portion 12b on a first connector 18 side in the chain case 12, and are joined to the side surfaces of the cylinder block 3 and the cylinder head 6. The first and second side wall portions 21 and 22 have first
20 and second contact portions 21a and 22a, which are contact surfaces that are in contact with
the side surfaces of the cylinder block 3 and the cylinder head 6 when being attached to the side surfaces of cylinder block 3 and the cylinder head 6. At predetermined positions of the first contact portion 21a, a plurality of (six in the present embodiment) bolt through holes 23 into which fixing members (not shown), for example, bolts are inserted when being attached
25 to the cylinder block 3 or the like, are formed through. Similarly, at predetermined positions
of the second contact portion 22a, a plurality of (eight in the present embodiment) bolt
through holes 24 into which bolts (not shown) are inserted when being attached to the
cylinder block 3 or the like, are formed through.
[0022] A pump accommodating portion 20a that accommodates the crankshaft 4, the rotor
30 25, a plurality of (nine in the present embodiment) vanes 26, a cam ring 27, and the like,
which are pump components of the oil pump 15, is formed at a substantially central portion of a lower portion of the bottom wall portion 20. After the rotor 25 and the like are accommodated in the pump accommodating portion 20a, the pump cover 29 made of a metal
6

material, for example, an aluminum alloy material is attached and fixed to the chain case 12
via a plurality of (eight in the present embodiment) fixing members, for example, bolts 28.
[0023] A suction port 30 that opens toward the oil pan 14 and sucks oil from the oil pan 14
is formed in an opening in a portion of the pump cover 29 close to the second contact portion
5 22a. Further, a discharge port 31 that discharges oil in the oil pump 15 to a main oil gallery
(not shown) is formed in a portion of the pump cover 29 close to the first contact portion 21a between the crankshaft 4 and the first contact portion 21a. Oil from the main oil gallery is supplied to a portion of the pump cover 29 that is shifted to a second contact portion 22a side with respect to the discharge port 31, and a relay port 32 that guides oil to a first control oil
10 chamber 54 and a first oil passage 35a to be described later, and the electromagnetic valve 16,
is formed. Further, a control device attaching portion 33 to which the electromagnetic valve
16 is attached is formed at a position of the pump cover 29 which is shifted to an end portion
12a side of the chain case 12 with respect to the relay port 32.
[0024] In a portion of the bottom wall portion 20 on the first connector 18 side with respect
15 to the oil pump 15 and at a position close to the first contact portion 21a, a first protruding
portion 35 that protrudes in an arc shape from an inner surface of the bottom wall portion 20, that is, from a bottom surface 34a of the accommodating portion 34 toward the side surfaces of the cylinder block 3 and the cylinder head 6, is formed. The first protruding portion 35 is linearly continuous from an upper portion of the pump cover 29 to the first connector 18 side.
20 The first oil passage 35a (indicated by a broken line in FIGS. 3 and 4) extending linearly
along the first protruding portion 35 is formed inside the first protruding portion 35. The
first oil passage 35a communicates with the relay port 32 of the oil pump 15, and oil from the
main oil gallery is guided through the relay port 32.
[0025] In a portion of the bottom wall portion 20 between an outer periphery of an end
25 portion 35b and the second side wall portion 22 on a side opposite to the oil pump 15 at the
first protruding portion 35, a second protruding portion 36 that protrudes in an arc shape from the bottom surface 34a of the accommodating portion 34 toward the side surface of the cylinder head 6 is formed. The second protruding portion 36 is linearly continuous from the end portion 35b of the first protruding portion 35 to the second side wall portion 22 so as to
30 be orthogonal to the first protruding portion 35. A second oil passage 36a (indicated by a
broken line in FIGS. 3 and 4) that communicates with the first oil passage 35a and that is orthogonal to the first oil passage 35a is formed inside the second protruding portion 36. A branch portion 37 communicating with the second oil passage 36a and supplying oil guided
7

through the first and second oil passages 35a and 36a to the valve timing control device (not shown) is formed in a central portion of the second protruding portion 36.
[0026] On an inner surface 21b, which is a surface of the first side wall portion 21 on an
accommodating portion 34 side, a sensor attaching portion 38 that bulges into a block shape
5 toward the first protruding portion 35 having the first oil passage 35a is formed in a bulge at a
position overlapping with the second protruding portion 36 in a width direction of the chain case 12 (a left-right direction in FIGS. 3 and 4). A hydraulic pressure sensor (not shown) that detects a hydraulic pressure in the first oil passage 35a is attached to the sensor attaching portion 38.
10 [0027] At a position facing the sensor attaching portion 38 on an outer periphery of the first
protruding portion 35, a rib (convex portion) 39 that regulates a movement of the harness 17 with respect to the chain case 12 between the sensor attaching portion 38 and the rib 39 is formed and protrudes from the outer periphery of the first protruding portion 35 toward the side surface of the cylinder head 6. The rib 39 extends linearly along the first protruding
15 portion 35.
[0028] A reinforcing rib 40 that reinforces the chain case 12 is formed and protrudes from
the bottom surface 34a of the accommodating portion 34 toward the side surface of the cylinder head 6 at a portion of the bottom wall portion 20 on a pump cover 29 side with respect to the second protruding portion 36. The reinforcing rib 40 is linearly continuous
20 from the second side wall portion 22 over the first protruding portion 35 to the first side wall
portion 21. A first projecting portion (convex portion) 40a protruding from the reinforcing
rib 40 toward the side surface of the cylinder head 6 is formed at a portion of the reinforcing
rib 40 close to the first side wall portion 21.
[0029] A connector attaching portion 41 to which the first connector 18 is attached is
25 formed in a bulge toward the second side wall portion 22 at a portion of the inner surface 21b
of the first side wall portion 21 adjacent to the sensor attaching portion 38 and an end portion 12b side. A bulging length of the connector attaching portion 41 along the width direction of the chain case 12 is shorter than a bulging length of the sensor attaching portion 38 along the width direction of the chain case 12. In an inner end surface that is a surface of the
30 connector attaching portion 41 on the accommodating portion 34 side, the opening portion 19
which is a communication hole that communicates an inside and an outside of the accommodating portion 34, that is, a through hole that communicates an inside and an outside of the chain case 12, and through which the first connector 18 is inserted is formed. The
8

opening portion 19 has a circular shape when viewed from a penetrating direction. A female
screw hole 41a to which a bolt 43 is screwed via a pass-through connector 42 that supports
the first connector 18 is provided at a portion of the inner end surface of the connector
attaching portion 41 adjacent to the opening portion 19 and the end portion 12b side.
5 [0030] The harness 17 electrically connects the electromagnetic valve 16 and the first
connector 18, and is formed by covering most of two electric wires 44a and 44b with a tube 45. The harness 17 extends from a harness connector 46 connected to the electromagnetic valve 16 substantially along an inner edge portion of the first contact portion 21a through between the discharge port 31 and the first contact portion 21a to the first connector 18 side,
10 and is connected to the pass-through connector 42 through an inside of a guide member 47.
At this time, the harness 17 is in contact with the first projecting portion 40a and is connected to the pass-through connector 42 through between the sensor attaching portion 38 and the rib 39. The harness 17 is attached and fixed to the bottom surface 34a of the accommodating portion 34 by a screw 48 provided in the vicinity of the discharge port 31 and a screw 49
15 provided above the oil pump 15. The screws 48 and 49 are made of a synthetic resin
material, and have annular insertion portions 48a and 49a in heads respectively into which the
harness 17 is inserted.
[0031] [Configuration of Oil Pump]
(a) of FIG. 5 is a plan view showing an internal state of the oil pump 15 when the
20 electromagnetic valve 16 is in an energized state, and (b) of FIG. 5 is a plan view showing an
internal state of the oil pump 15 when the electromagnetic valve 16 is in a non-energized
state. FIG. 6 is a plan view of the oil pump 15 showing a flow of oil in the oil pump 15.
[0032] As shown in (a) of FIG. 5 and (b) of FIG. 5, the crankshaft 4 as a rotating shaft, the
rotor 25 assembled to an outer peripheral portion of the crankshaft 4, the vane 26, the cam
25 ring 27, a first coil spring 50, and the like are accommodated in the pump accommodating
portion 20a.
[0033] A pivot pin 51 and first and second sealing members 52 and 53 are provided in an
outer peripheral region of the cam ring 27. A pair of first and second control oil chambers 54 and 55 are defined by the pivot pin 51 and the first and second sealing members 52 and 53.
30 [0034] A hydraulic pressure discharged from the discharge port 31 is supplied to the main
oil gallery (M/G) as indicated by an arrow E in FIG. 6. Further, the hydraulic pressure supplied to the main oil gallery is supplied to the relay port 32 as indicated by an arrow F in FIG. 6. The hydraulic pressure supplied to the relay port 32 is guided to the first control oil
9

chamber 54 as indicated by a broken line arrow G in FIG. 6, and is guided to the
electromagnetic valve 16 as indicated by a broken line arrow H in FIG. 6.
[0035] The electromagnetic valve 16 includes a valve portion 56 that supplies and
discharges oil in accordance with an axial position in a moving direction of a spool valve 59
5 to be described later, and a solenoid portion 57 that controls the axial position of the spool
valve 59 by energization.
[0036] The valve portion 56 includes a substantially cylindrical valve body 58, the spool
valve 59 slidably disposed in the valve body 58, a stopper 60 fixed to an inner circumferential portion of the valve body 58, a retainer 61 in contact with the stopper 60, and a second coil
10 spring 62 disposed in a state where a predetermined set load is applied between the retainer 61
and the spool valve 59.
[0037] The solenoid portion 57 includes a second connector 63 connected to the harness
connector 46 provided at one end portion of the harness 17. In the solenoid portion 57, when a movable iron core (not shown) is attracted to a fixed iron core (not shown) by an
15 electromagnetic force generated when a coil (not shown) is energized via the second
connector 63, a rod 57a movable integrally with the movable iron core presses the spool valve
59 toward a retainer 61 side against an urging force of the second coil spring 62.
[0038] As indicated by the broken line arrow G in FIG. 6, the hydraulic pressure is
supplied from the main oil gallery via the relay port 32 to the first control oil chamber 54.
20 Accordingly, a first pressure receiving surface 27a formed by an outer peripheral surface of
the cam ring 27 facing the first control oil chamber 54 receives the hydraulic pressure introduced from the relay port 32, and applies a swinging force (moving force) in a direction (clockwise direction in (a) of FIG. 5, (b) of FIG. 5, and FIG. 6) in which an amount of eccentricity of the cam ring 27 against an urging force of the first coil spring 50 is reduced.
25 [0039] On the other hand, the hydraulic pressure is also appropriately introduced into the
second control oil chamber 55 in accordance with the axial position of the spool valve 59 that is changed by an ON/OFF operation of the electromagnetic valve 16 to which the hydraulic pressure is supplied via the relay port 32 (a broken line arrow I in FIG. 6). Accordingly, a second pressure receiving surface 27b formed by the outer peripheral surface of the cam ring
30 27 facing the second control oil chamber 55 receives the hydraulic pressure introduced via the
electromagnetic valve 16, and applies a swinging force (moving force) in a direction (counterclockwise direction in (a) of FIG. 5, (b) of FIG. 5, and FIG. 6) in which the amount of eccentricity of the cam ring 27 is increased.
10

[0040] In such an oil pump 15, as shown in (a) of FIG. 5, when a coil of the
electromagnetic valve 16 is energized, the hydraulic pressure from the main oil gallery is guided to the first control oil chamber 54, and on the other hand, the hydraulic pressure from the second control oil chamber 55 is discharged to an outside via the electromagnetic valve 5 16.
[0041] As shown in (b) of FIG. 5, when the coil of the electromagnetic valve 16 is not
energized, the hydraulic pressure from the main oil gallery is guided to the first control oil chamber 54, and is guided to the second control oil chamber 55 via the electromagnetic valve 16.
10 [0042] FIG. 7 is a perspective view of the chain case 12 and the like when viewed from the
electromagnetic valve 16 side.
[0043] An attachment surface 64, which is orthogonal to the first contact portion 21a and to
which a flange portion of the oil pan 14 is attached, is formed at the end portion 12a of the chain case 12 on the electromagnetic valve 16 side. A plurality of (two in the present
15 embodiment) female screw holes 65 are formed in the attachment surface 64, and bolts (not
shown) used for attaching the flange portion of the oil pan 14 are screwed into each female screw hole 65.
[0044] The control device attaching portion 33 to which the electromagnetic valve 16 is
attached is integrally formed in a portion of the pump cover 29 close to the first contact
20 portion 21a. The control device attaching portion 33 has a bottomed cylindrical valve body
holding portion 66 into which the valve body 58 of the electromagnetic valve 16 is inserted and held. Most of the valve body holding portion 66 is accommodated in the
accommodating portion 34 inside the chain case 12, and a portion of the valve body holding portion 66 is positioned on an oil pan 14 side (near side in FIG. 7) with respect to the
25 attachment surface 64. A protrusion 66a protruding toward the bottom surface 34a of the
accommodating portion 34 is formed and protrudes from an outer peripheral surface of the valve body holding portion 66. The protrusion 66a is formed with a communication groove 67 that extends obliquely downward (toward an attachment surface 64 side) from a valve body holding portion 66 side toward the accommodating portion 34 side and that disposes the
30 harness 17 between the protrusion 66a and the bottom surface 34a. The communication
groove 67 communicates a first opening 68 that is positioned at an attachment portion of the electromagnetic valve 16 in the control device attaching portion 33, that is, on a bottom surface 34a side of the accommodating portion 34 with respect to the valve body holding
11

portion 66 and that opens toward the first contact portion 21a, and a second opening 69 that is
positioned on the bottom surface 34a side of the accommodating portion 34 with respect to
the valve body holding portion 66 in the same way and that opens toward the oil pan 14. A
groove width of the communication groove 67 is set to a width corresponding to an outer
5 diameter of the tube 45 of the harness 17. By setting the groove width of the communication
groove 67 so as to be slightly narrower than the outer diameter of the tube 45, a holding force for the harness 17 may be increased.
[0045] An inner surface of a side wall 67a of the communication groove 67 inclines toward
an inner side (far side in FIG. 7) of the accommodating portion 34 as being separated from an
10 outer periphery of the valve body holding portion 66, and becomes an inclined surface 67b for
lifting the harness 17 to the valve body holding portion 66 side.
[0046] A size of a gap 90 between the side wall 67a of the communication groove 67 and
the bottom surface 34a of the accommodating portion 34 is set to be smaller than the outer diameter of the tube 45 of the harness 17.
15 [0047] A second projecting portion (convex portion) 70 is formed at a portion of the
bottom surface 34a facing the second opening 69 so that the harness 17 is directed to the accommodating portion 34 side with respect to the attachment surface 64 so that the harness 17 does not face a side wall of the oil pan 14. As shown in FIG. 7, the second projecting portion 70 is formed and protrudes so as to be alternated with respect to the protrusion 66a.
20 The second projecting portion 70 has a conical tapered surface 70a whose protrusion height
increases toward a first contact portion 21a side. A size of a gap 91 between the second
projecting portion 70 and the side wall 67a of the communication groove 67 is set to be
smaller than the outer diameter of the tube 45 of the harness 17.
[0048] The harness 17 is formed such that two electric wires 44a and 44b are covered with
25 the tube 45, and as shown in FIG. 7, the electric wires 44a and 44b are exposed from the tube
45 at the one end portion of the harness 17. The exposed electric wires 44a and 44b are connected to the harness connector 46. The harness connector 46 is attached to the second connector 63 provided at an end portion of the solenoid portion 57 disposed in the oil pan 14. A portion of the harness 17 close to the exposed electric wires 44a and 44b (a portion covered
30 by the tube 45) is screwed to a flange portion 66b protruding from the valve body holding
portion 66 via a synthetic resin-made screw 71 having an annular insertion portion 71a, in a head, into which the harness 17 is inserted. The screw 71 is positioned on the oil pan 14 side (near side in FIG. 7) with respect to the attachment surface 64 (see FIG. 3). Therefore, a
12

portion of the harness 17 held by the insertion portion 71a of the screw 71 is also positioned
on the oil pan 14 side with respect to the attachment surface 64. Then, the harness 17 is
routed through an inside of the communication groove 67 to the first contact portion 21a side
of the chain case 12. In a state where the harness 17 is disposed in the communication
5 groove 67, the harness 17 is lifted to the valve body holding portion 66 side by the inclined
surface 67b that is the inner surface of the side wall 67a. Further, the harness 17 extending from the second opening portion 19 toward the attachment surface 64 side is directed to the accommodation portion 34 side with respect to the attachment surface 64 by the conical tapered surface 70a of the second projecting portion 70.
10 [0049] FIG. 8 is a front view of the chain case 12 and the like showing a portion
surrounded by a broken line circle X1 in FIG. 3.
[0050] As shown in FIG. 8, the inner surface 21b of the first side wall portion 21 is
provided with a recessed portion 21c which is recessed from the inner surface 21b toward the outside of the chain case 12. At a portion of the pump cover 29 facing the recessed portion
15 21c, the discharge port 31 protruding in a cylindrical shape from the pump cover 29 toward
the side surface of the cylinder block 3 is formed. On an outer peripheral edge portion of a tubular outer wall portion (convex portion) 31a of the discharge port 31, a holding portion 31b that holds an outer peripheral portion of the harness 17 between the holding portion 31b and the bottom surface 34a of the accommodating portion 34 is formed and protrudes toward the
20 recessed portion 21c of the first side wall portion 21. The holding portion 31b extends in an
arc shape along the outer peripheral edge portion of the discharge port 31. A size of a gap 92 between the holding portion 31b and the recessed portion 21c is equal to an outer diameter of the harness 17 (the outer diameter of the tube 45) or smaller than the outer diameter of the harness 17. The holding portion 31b has a facing surface (not shown) facing the bottom
25 surface 34a of the accommodating portion 34. A holding groove 93 into which an outer
peripheral portion of the harness 17 is fitted is provided between the facing surface of the holding portion 31b and the bottom surface 34a. A groove width of the holding groove 93 is set to a size corresponding to the outer diameter of the harness 17. By setting the groove width of the holding groove 93 so as to be slightly narrower than the outer diameter of the
30 harness 17, the holding force for the harness 17 may be increased.
[0051] A first fixing member installation portion (convex portion) 72 having a triangular
plate shape and having a through hole (not shown) into which the bolt 28 is inserted is formed and protrudes from the bottom surface 34a in a pedestal shape at a portion in the pump cover
13

29 between the discharge port 31 and the valve body holding portion 66. The first fixing member installation portion 72 has a first arc portion 72a formed by rounding one corner portion.
[0052] In a portion of the inner surface 21b of the first side wall portion 21 facing the first
5 fixing member installation portion 72, a protrusion (convex portion) 73 protruding from the
inner surface 21b toward the first arc portion 72a of the first fixing member installation portion 72 is formed and protrudes. The protrusion 73 has a substantially circular shape when viewed from a penetrating direction of a bolt through hole 23, and has a second arc portion 73a curved in an arc shape along an outer periphery of the protrusion 73. A holding
10 groove 94 into which the outer peripheral portion of the harness 17 is fitted is provided
between the second arc portion 73a of the protrusion 73 and the first arc portion 72a of the first fixing member installation portion 72. A groove width of the holding groove 94 is set to a size corresponding to the outer diameter of the harness 17 (the outer diameter of the tube 45). By setting the groove width of the holding groove 94 so as to be slightly narrower than
15 the outer diameter of the harness 17, the holding force for the harness 17 may be increased.
[0053] Similarly, a second fixing member installation portion (convex portion) 74 having a
through hole (not shown) into which the bolt 28 is inserted is formed and protrudes from the bottom surface 34a in a pedestal shape in a portion of the oil pump 15 on a side opposite to the first fixing member installation portion 72 with the discharge port 31 interposed
20 therebetween. The second fixing member installation portion 74 includes a contact portion
74a that is in contact with the harness 17 at a position facing a boss portion inner surface 75a that is an inner surface of a boss portion 75 in which the bolt through hole 23 is formed. A holding groove 95 into which the outer peripheral portion of the harness 17 is fitted is provided between the boss portion inner surface 75a of the boss portion 75 and the contact
25 portion 74a of the second fixing member installation portion 74. A groove width of the
holding groove 95 is set to a size corresponding to the outer diameter of the harness 17 (the outer diameter of the tube 45). By setting the groove width of the holding groove 95 so as to be slightly narrower than the outer diameter of the harness 17, the holding force for the harness 17 may be increased.
30 [0054] The harness 17 is routed to the first connector 18 side through the holding grooves
94, 93, and 95. At this time, the harness 17 is held in a curved state following an arc-shaped surface 31c provided on an outer periphery of the discharge port 31 in cooperation with the inner surface 21b of the first contact portion 21a, and is held by the bottom surface 34a and
14

the facing surface of the holding portion 31b. Further, the harness 17 is fitted and held in the
holding groove 94 formed by the second arc portion 73a and the first arc portion 72a, and is
fitted and held in the holding groove 95 formed by the boss portion inner surface 75a and the
contact portion 74a. The harness 17 thus held extends substantially along the inner edge
5 portion of the first contact portion 21a to the first connector 18 side.
[0055] FIG. 9 is a perspective view of the chain case 12 and the like showing a portion
surrounded by a broken line circle X2 in FIG. 3. FIG. 10 is a cross-sectional view of the
chain case 12 and the like cut along a line A-A in FIG. 3.
[0056] The box-shaped sensor attaching portion 38 facing the end portion 35b of the first
10 protruding portion 35 is formed in a bulge on the inner surface 21b of the first side wall
portion 21. The sensor attaching portion 38 is formed at a position offset toward the bottom surface 34a side with respect to the first contact portion 21a.
[0057] The first protruding portion 35 has the rib 39 protruding from an outer peripheral
surface of the first protruding portion 35 toward the side surface of the cylinder head 6. The
15 rib 39 is provided at a position facing the sensor attaching portion 38, and extends linearly in
the up-down direction along the first protruding portion 35. A concave portion 76 in which the harness 17 is disposed is formed among the rib 39, the first protruding portion 35 and the sensor attaching portion 38. The concave portion 76 is recessed in an arc shape on a side opposite to the first contact portion 21a with respect to a surface 38a of the sensor attaching
20 portion 38 substantially parallel to the first contact portion 21a. A groove width and a depth
of the concave portion 76 are set to be larger than the outer diameter of the harness 17. The groove width of the concave portion 76 may be set to a width corresponding to the outer diameter of the harness 17 (the outer diameter of the tube 45) or a width slightly smaller than the outer diameter of the harness 17.
25 [0058] The first projecting portion 40a protruding from the reinforcing rib 40 toward the
side surface of the cylinder head 6 is formed in the reinforcing rib 40 provided on an oil pump 15 side with respect to the first protruding portion 35. The first projecting portion 40a is formed at a position of the reinforcing rib 40 overlapping with the rib 39 in a longitudinal direction of the chain case 12 (up-down direction in FIG. 9). The first projecting portion 40a
30 has a regulating portion 40b that regulates a movement of the harness 17 toward a second
protruding portion 36 side by contacting with the outer peripheral portion of the harness 17.
[0059] The guide member 47 that changes an extending direction of the harness 17
extending substantially along the inner edge portion of the first contact portion 21a to a pass-
15

through connector 42 side is attached to an end portion of the harness 17 on the first
connector 18 side by a binding band 77 made of synthetic resin. The guide member 47 is
attached to a terminal accommodating portion 78 provided on the pass-through connector 42.
[0060] (a) of FIG. 11 is a front view showing a vicinity of the first connector 18 in a state
5 where the guide member 47 is attached, and (b) of FIG. 11 is an arrow view showing the
vicinity of the first connector 18 when viewed from a direction of an arrow C in (a) of FIG. 11. (a) of FIG. 12 is a front view showing the vicinity of the first connector 18 in a state where the guide member 47 is removed, and (b) of FIG. 12 is an arrow view showing the vicinity of the first connector 18 when viewed from a direction of an arrow D in (a) of FIG.
10 12.
[0061] The first connector 18 is formed in a bottomed cylindrical shape by a synthetic resin
material. Two annular grooves 80 into which two annularly continuous sealing members 79 made of rubber are fitted are provided on an outer peripheral surface of one end portion in an axial direction of the first connector 18.
15 [0062] The plate-shaped pass-through connector 42 made of a synthetic resin material is
attached to one end surface 18a in the axial direction of the first connector 18. The terminal accommodating portion 78 made of synthetic resin is attached to the pass-through connector 42. The terminal accommodating portion 78 is formed in a box shape with an open upper portion, and has two terminal insertion portions 78b and 78b partitioned by a plate-shaped
20 partition wall 78a provided integrally with the terminal accommodating portion 78.
Terminals 81a and 81b provided at tip ends of the two electric wires 44a and 44b of the harness 17 exposed from the tube 45 are inserted into the terminal insertion portions 78b and 78b. The terminals 81a and 81b are electrically connected to the first connector 18 via the terminal accommodating portion 78 and the pass-through connector 42. A bolt insertion
25 hole 42a is formed through the pass-through connector 42 along a thickness direction of the
pass-through connector 42. A bolt (not shown) for attaching the pass-through connector 42
to the female screw hole 41a (see FIG. 4) of the connector attaching portion 41 is inserted into
the bolt insertion hole 42a.
[0063] The guide member 47 that changes the extending direction of the harness 17
30 extending substantially along the inner edge portion of the first contact portion 21a to the first
connector 18 side is attached to the terminal accommodating portion 78 and the harness 17. The guide member 47 is formed as a synthetic resin cover that covers the terminal insertion portions 78b and 78b of the terminal accommodating portion 78, the electric wires 44a and
16

44b exposed from the tube 45, and a crimping portion 45a of the tube 45 provided in the
vicinity of the electric wires 44a and 44b. As shown in (a) of FIG. 11, the guide member 47
is formed in an L shape, and includes a main body portion 47a attached to the terminal
accommodating portion 78 and an expanded portion 47b expanded from the main body
5 portion 47a to the crimping portion 45a of the tube 45. The main body portion 47a includes
a fitting portion 82 into which a rectangular plate-shaped projection portion 78c that protrudes outward from both side edges of the terminal accommodating portion 78 is fitted, and a cutout portion 83 with which a claw portion 78d provided in the terminal accommodating portion 78 elastically contacts by a snap fitting. The expanded portion 47b has a groove concave
10 portion 47c fitted into the crimping portion 45a of the tube 45. By winding the binding band
77 made of synthetic resin around the groove concave portion 47c, the groove concave portion 47c is fixed to the crimping portion 45a of the tube 45. When the electric wires 44a and 44b are accommodated in the expanded portion 47b and the main body portion 47a of the guide member 47 configured as described above, the extending direction of the harness 17
15 extending substantially along the inner edge portion of the first contact portion 21a is changed
to the first connector 18 side.
[0064] FIG. 13 is a cross-sectional view of the chain case 12 and the like cut along a line
B-B in FIG. 3. In FIG. 13, the first connector 18, the pass-through connector 42 attached thereto, and the like are not shown as cross-sectional views.
20 [0065] As shown in FIG. 13, the opening portion 19, which is a through hole, is formed in
the first side wall portion 21 so as to incline with respect to the first side wall portion 21. That is, the opening portion 19 is formed in the first side wall portion 21 so as to incline to a control device attaching portion 33 side from the outside to the inside of the chain case 12, that is, from the outside to the inside of the accommodating portion 34. In a state where the
25 first connector 18 is inserted into the opening portion 19, the first connector 18 faces the
outside of the accommodating portion 34 from the opening portion 19, and the
accommodating portion 34 is liquid-tightly sealed by the annular sealing members 79 fitted
into the two annular grooves 80 of the first connector 18.
[0066] [Effects of Present Embodiment]
30 In the related art, since a harness is led out from a vicinity of an oil pan to an
outside of a chain case and routed to first and second camshafts sides, the harness may
interfere with various devices driven by a crankshaft.
[0067] In contrast, in the present embodiment, the harness 17 extends from the oil pan 14
17

side substantially along the inner edge portion of the first contact portion 21a to the first and
second camshafts 7 and 8 sides in the accommodating portion 34 provided inside the chain
case 12. Accordingly, it is possible to suppress the interference between the harness 17 and
the above devices.
5 [0068] In the present embodiment, the harness 17 is disposed in the concave portion 76
formed between the sensor attaching portion 38 and the first protruding portion 35 having the first oil passage 35a. Accordingly, a position of the harness 17 in the accommodating portion 34 is regulated, and the interference between the harness 17 and the timing chain 11 can be suppressed.
10 [0069] As a matter of course, when the groove width of the concave portion 76 is made to
correspond to the outer diameter of the harness 17 or slightly smaller than the outer diameter of the harness 17 and the outer peripheral portion of the harness 17 is held from both sides by side walls of the concave portion 76, the position of the harness 17 in the accommodating portion 34 can be further regulated, and the interference between the harness 17 and the
15 timing chain 11 can be further suppressed.
[0070] Further, in the present embodiment, the rib 39 extending along the first protruding
portion 35 is formed in a portion of the first protruding portion 35 having the first oil passage 35a facing the sensor attaching portion 38. The rib 39 ensures the depth of the concave portion 76 between the sensor attaching portion 38 and the first protruding portion 35 to be
20 large. Therefore, it is possible to suppress the harness 17 from being separated from the
concave portion 76 over the rib 39 and moving toward a timing chain 11 side disposed at a
center of the accommodating portion 34. Therefore, the interference between the harness 17
and the timing chain 11 can be further suppressed.
[0071] In the present embodiment, the harness 17 is held in the curved state following the
25 arc-shaped surface 31c provided on the outer periphery of the discharge port 31 in
cooperation with the inner surface 21b of the first side wall portion 21. Therefore, the harness 17 is held while being in contact with the arc-shaped surface 31c and the inner surface 21b in a stretched state due to flexibility of the harness 17. Accordingly, it becomes difficult for the harness 17 to move to the second contact portion 22a side, and the interference
30 between the harness 17 and the timing chain 11 can be efficiently suppressed.
[0072] Further, in the present embodiment, on the outer peripheral edge portion of the outer
wall portion 31a of the discharge port 31, the holding portion 31b is formed and protrudes toward the recessed portion 21c of the first side wall portion 21. Further, the holding groove
18

93 into which the outer peripheral portion of the harness 17 is fitted is provided between the
facing surface of the holding portion 31b and the bottom surface 34a. Therefore, the harness
17 is more firmly held with respect to the chain case 12, and is less likely to come off to a
cylinder block 3 side. Therefore, the interference between the harness 17 and the timing
5 chain 11 can be further suppressed. In addition, since the size of the gap 92 between the
holding portion 31b and the recessed portion 21c is equal to or smaller than the outer diameter of the harness 17, it is possible to further suppress the harness 17 from coming off to the cylinder block 3 side, and efficiently suppress the interference between the harness 17 and the timing chain 11.
10 [0073] In the present embodiment, the harness 17 is disposed in the communication groove
67 that communicates the first opening 68 that opens toward the first contact portion 21a and the second opening 69 that opens toward the oil pan 14. The side wall 67a of the communication groove 67 has the inclined surface 67b for lifting the harness 17 to the valve body holding portion 66 side. Accordingly, it is possible to easily lead out the harness 17 to
15 the first connector 18 side through a space between the first side wall portion 21 and the pump
cover 29.
[0074] Further, in the present embodiment, the size of the gap 90 between the side wall 67a
of the communication groove 67 and the bottom surface 34a of the accommodating portion 34 is set to be smaller than the outer diameter of the harness 17. Accordingly, it is possible to
20 suppress the harness 17 from coming off from the communication groove 67 and interfering
with the timing chain 11.
[0075] In the present embodiment, the second projecting portion 70 protruding to the
accommodating portion 34 side is formed at the portion of the bottom surface 34a facing the second opening 69. The second projecting portion 70 has the conical tapered surface 70a,
25 and the conical tapered surface 70a directs the harness 17 extending from the second opening
69 toward the side wall of the oil pan 14 to the accommodating portion 34 side with respect to the attachment surface 64. Further, since the size of the gap 91 between the second projecting portion 70 and the side wall 67a of the communication groove 67 is set to be smaller than the outer diameter of the harness 17, it is possible to suppress the harness 17
30 from coming off from the communication groove 67. Therefore, it is possible to suppress
the interference between the harness 17 and the side wall of the oil pan 14, and also to suppress the harness 17 from getting caught between the oil pan 14 and the chain case 12 when the oil pan 14 is attached to the chain case 12.
19

[0076] In the present embodiment, the first projecting portion 40a protruding toward the
side surface of the cylinder head 6 is formed and protrudes from the chain case 12. The first
projecting portion 40a has the regulating portion 40b that regulates the movement of the
harness 17 to the second protruding portion 36 side by contacting with the outer peripheral
5 portion of the harness 17. By regulating the movement of the harness 17 to the second
contact portion 22a side by the regulating portion 40b, the interference between the harness 17 and the timing chain 11 can be suppressed.
[0077] As the case member for an engine based on the embodiment described above, for
example, the case member for an engine of the following aspects can be considered.
10 [0078] As an one aspect, a case member for an engine that is attached to a side surface of
the engine and in which an endless transmission body is disposed, the endless transmission body configured to transmit a rotational force from a crankshaft to a camshaft includes: a contact portion that is in contact with the side surface of the engine; an accommodating portion in which the endless transmission body is to be disposed in a space formed inside the
15 contact portion between the accommodating portion and the side surface of the engine; a
control device that is disposed on a side close to an oil pan in an operating direction of a piston provided in the engine, and that is configured to electrically change a discharge characteristic of an oil pump that is configured to discharge lubricating oil of the engine; an opening portion that is disposed on a side close to the camshaft in the operating direction of
20 the piston and that communicates an inside and an outside of the accommodating portion; a
connector that faces the outside of the accommodating portion from the opening portion; and
a harness that electrically connects the control device and the connector and that is disposed
along an inside of the contact portion in the accommodating portion.
[0079] In a preferred aspect of the case member for the engine, an oil passage
25 communicating with the oil pump is integrally formed in the accommodating portion so as to
extend from the control device toward a side of the connector and to protrude toward a side of
the engine, and the harness is disposed between the inside of the contact portion and the oil
passage.
[0080] According to other preferred aspect, in any one of aspects of the case member for
30 the engine, the accommodating portion includes a sensor attaching portion that bulges so as to
face the oil passage, and the harness is disposed in a concave portion formed between the
sensor attaching portion and the oil passage.
[0081] According to other preferred aspect, a rib extending along the oil passage is formed
20

in a portion of the oil passage facing the sensor attaching portion, and the harness is disposed between the sensor attaching portion and the rib.
[0082] According to other preferred aspect, in any one of aspects of the case member for
the engine, the oil pump is provided in the accommodating portion, and the harness is
5 disposed between the inside of the contact portion and the oil pump.
[0083] According to other preferred aspect, in any one of aspects of the case member for
the engine, a discharge port configured to discharge oil is provided in the oil pump so as to protrude toward a side of the side surface of the engine, and the harness is disposed between the inside of the contact portion and an outer periphery of the discharge port.
10 [0084] According to other preferred aspect, in any one of aspects of the case member for
the engine, the outer periphery of the discharge port has an arc-shaped surface having an arc
shape, and the harness is held in a curved state following the arc-shaped surface in
cooperation with the inside of the contact portion.
[0085] According to other preferred aspect, in any one of aspects of the case member for
15 the engine, on the outer periphery of the discharge port, a holding portion extending along the
outer periphery is formed so as to protrude toward a side of the contact portion, and the
harness is held by the holding portion and a bottom surface of the accommodating portion
which is a surface facing the side surface of the engine.
[0086] According to other preferred aspect, in any one of aspects of the case member for
20 the engine, the control device is attached to a control device attaching portion provided at an
end portion on a side of the oil pan, and a communication groove that communicates a first opening that opens toward the contact portion and a second opening that opens toward the oil pan is formed in the control device attaching portion on a side of a bottom surface of the accommodating portion with respect to an attachment portion of the control device, and the
25 harness is disposed in the communication groove.
[0087] According to other preferred aspect, in any one of aspects of the case member for
the engine, a projecting portion protruding toward a side of the accommodating portion is formed in a portion of the bottom surface facing the second opening, and the projecting portion directs the harness to the side of the accommodating portion.
30 [0088] According to other preferred aspect, in any one of aspects of the case member for
the engine, a guide member that changes an extending direction of the harness extending along the inside of the contact portion to a side of the connector is attached to an inner side of the accommodating portion in the opening portion.
21

[0089] As other case member for an engine based on the embodiment described above, for
example, the case member for the engine of the following aspect can be considered.
[0090] According to an one aspect, a case member for an engine that is attached to a side
surface of the engine and in which an endless transmission body is disposed, the endless
5 transmission body configured to transmit a rotational force from a crankshaft to a camshaft
includes: a contact portion that is in contact with the side surface of the engine; an accommodating portion in which the endless transmission body is to be disposed in a space formed inside the contact portion between the accommodating portion and the side surface of the engine, and in which a convex portion or a concave portion facing the side surface of the
10 engine is formed; a control device that is disposed on a side close to an oil pan in an operating
direction of a piston provided in the engine, and that is configured to electrically change a discharge characteristic of an oil pump that is configured to discharge lubricating oil of the engine; an opening portion that is disposed on a side close to the camshaft in the operating direction of the piston and that communicates an inside and an outside of the accommodating
15 portion; a connector that faces the outside of the accommodating portion from the opening
portion; and a harness that electrically connects the control device and the connector and whose position in the accommodating portion is regulated by the convex portion or the concave portion.

WE CALIM:

1.A case member for an engine that is attached to a side surface of the engine and in
which an endless transmission body is disposed, the endless transmission body configured to
5 transmit a rotational force from a crankshaft to a camshaft, the case member for the engine
comprising:
a contact portion that is in contact with the side surface of the engine;
an accommodating portion in which the endless transmission body is to be disposed
in a space formed inside the contact portion between the accommodating portion and the side
10 surface of the engine;
a control device that is disposed on a side close to an oil pan in an operating
direction of a piston provided in the engine, and that is configured to electrically change a
discharge characteristic of an oil pump that is configured to discharge lubricating oil of the
engine;
15 an opening portion that is disposed on a side close to the camshaft in the operating
direction of the piston and that communicates an inside and an outside of the accommodating portion;
a connector that faces the outside of the accommodating portion from the opening
portion; and
20 a harness that electrically connects the control device and the connector and that is
disposed along an inside of the contact portion in the accommodating portion.
2. The case member for the engine according to claim 1, wherein
an oil passage communicating with the oil pump is integrally formed in the
25 accommodating portion so as to extend from the control device toward a side of the connector
and to protrude toward a side of the engine, and
the harness is disposed between the inside of the contact portion and the oil passage.
3. The case member for the engine according to claim 2, wherein
30 the accommodating portion includes a sensor attaching portion that bulges so as to
face the oil passage, and
the harness is disposed in a concave portion formed between the sensor attaching portion and the oil passage.
23

4. The case member for the engine according to claim 3, wherein
a rib extending along the oil passage is formed in a portion of the oil passage facing
the sensor attaching portion, and
5 the harness is disposed between the sensor attaching portion and the rib.
5. The case member for the engine according to claim 1, wherein
the oil pump is provided in the accommodating portion, and
the harness is disposed between the inside of the contact portion and the oil pump.
10
6. The case member for the engine according to claim 5, wherein
a discharge port configured to discharge oil is provided in the oil pump so as to protrude toward a side of the side surface of the engine, and
the harness is disposed between the inside of the contact portion and an outer
15 periphery of the discharge port.
7. The case member for the engine according to claim 6, wherein
the outer periphery of the discharge port has an arc-shaped surface having an arc
shape, and
20 the harness is held in a curved state following the arc-shaped surface in cooperation
with the inside of the contact portion.
8. The case member for the engine according to claim 7, wherein
on the outer periphery of the discharge port, a holding portion extending along the
25 outer periphery is formed so as to protrude toward a side of the contact portion, and
the harness is held by the holding portion and a bottom surface of the accommodating portion which is a surface facing the side surface of the engine.
9. The case member for the engine according to claim 1, wherein
30 the control device is attached to a control device attaching portion provided at an
end portion on a side of the oil pan, and
a communication groove that communicates a first opening that opens toward the contact portion and a second opening that opens toward the oil pan is formed in the control
24

device attaching portion on a side of a bottom surface of the accommodating portion with respect to an attachment portion of the control device, and the harness is disposed in the communication groove.
5 10. The case member for the engine according to claim 9, wherein a projecting portion
protruding toward a side of the accommodating portion is formed in a portion of the bottom surface facing the second opening, and the projecting portion directs the harness to the side of the accommodating portion.
10 11. The case member for the engine according to claim 1, wherein a guide member that
changes an extending direction of the harness extending along the inside of the contact portion to a side of the connector is attached to an inner side of the accommodating portion in the opening portion.
15 12. A case member for an engine that is attached to a side surface of the engine and in
which an endless transmission body is disposed, the endless transmission body configured to transmit a rotational force from a crankshaft to a camshaft, the case member for the engine comprising:
a contact portion that is in contact with the side surface of the engine;
20 an accommodating portion in which the endless transmission body is to be disposed
in a space formed inside the contact portion between the accommodating portion and the side surface of the engine, and in which a convex portion or a concave portion facing the side surface of the engine is formed;
a control device that is disposed on a side close to an oil pan in an operating
25 direction of a piston provided in the engine, and that is configured to electrically change a
discharge characteristic of an oil pump that is configured to discharge lubricating oil of the engine;
an opening portion that is disposed on a side close to the camshaft in the operating
direction of the piston and that communicates an inside and an outside of the accommodating
30 portion;
a connector that faces the outside of the accommodating portion from the opening portion; and
a harness that electrically connects the control device and the connector and whose
25

position in the accommodating portion is regulated by the convex portion or the concave portion.