Description:TECHNICAL FIELD
[0001]
The present subject matter relates generally to a drive unit of a vehicle and more particularly, to an arm assembly of the drive unit of the vehicle.
BACKGROUND
[0002]
Typically, in a conventional internal combustion engine assembly, two intake rocker arms are provided with two cam lobes for intake of fuel in the 5 compression chamber and one exhaust rocker arm is provided with exhaust cam lobes. The each of the intake and exhaust cam lobes are configured to have one or more parts such as an acceleration part, a peak lift area and a deceleration part. Further, the one or more part of the each of the intake and exhaust cam lobes is configured to actuate one or more rocker arms of the engine assembly. The one or 10 more rocker arms are connected to the valves of the internal combustion engine assembly.
[0003] The Valves for internal combustion (IC) engines are generally opened and closed to allow for the intake and exhaust of gases in a cylinder of the IC engine. Valves are operated by various valve lifter mechanisms including rocker arms and 15 roller finger follower assemblies.
[0004]
The one or more rocker arm is actuated by a solenoid and the one or more rocker arm is provided with at least two contacts to be in contact with at least two cam lobes for providing variable valve timings. However, the at least two contacts increase part count and makes the design of the system very complex. Moreover, 20 this configuration also takes up packaging space in the cylinder head of the engine.
3
[0005]
In a conventional internal combustion engine, the engagement of a pin for the movement of the rocker arm is in parallel direction, which becomes the disadvantage to the inertia of the system, and which tends to increase the overall inertia of the engine, due to this speed of the vehicle tends to reduce. Also, the cam lobes acceleration part also impacts the inertia of the system so if we reduce the 5 inertia of the rocker arm, the acceleration provided to the cam lobe will increase.
[0006] Timing valve opening and closing is important to maximize fuel efficiency, assure complete combustion, and maximize engine output. Adjusting valve timing can lead to improvements in fuel economy, IC engine emissions, torque, and idle quality. 10
[0007]
Therefore, there is an essential requirement for a solution that provides that decrease the inertia of the IC engine assembly and also the to provide straightforward design of the IC engine to increase the efficiency of the IC engine.
SUMMARY
[0008]
Aspects of the present invention pertain to a power drive assembly, the 15 power drive assembly having one or more valves, at least one shaft, the at least one shaft may be configured to actuate the one or more valves. The at least one shaft including a plurality of cam lobes. The plurality of cam lobes being actuated by an actuator device and an arm assembly for operating at different operating parameters. 20
[0009]
Another aspect of the present invention, the plurality of cam lobes having a first lobe, a second lobe and a third lobe.
4
[00010]
Another aspect of the present invention, the first lobe and the second lobe may be configured to actuate the one or more valves of the power drive assembly.
[00011]
Another aspect of the present invention, the first lobe may be configured to perform a low lift operation and the second lobe may be configured to perform a high lift operation. 5
[00012]
Another aspect of the present invention, the arm assembly having a roller, one or more openings, an arm, the arm may be configured to have one or more portions, one or more attachment members, the one or more attachment members may configure to connect the one or more portions to an arm shaft via one or more openings, a valve operating assembly, the valve operating member may be 10 configured to accommodate the one or more portions.
[00013]
Another aspect of the present invention, the roller may be configured to operably connected with a base surface region of the first lobe and the second lobe to perform the low lift and the high lift operation.
[00014]
Another aspect of the present invention, the one or more openings may be 15 configured to accommodate the arm shaft and connect the arm to the valve operating member.
[00015]
Another aspect of the present invention, the arm having a first portion and a second portion, wherein the first portion and the second portion may be configured to have different cross-section. 20
[00016]
Another aspect of the present invention, the second portion may be configured to have a lower surface, the lower surface may be operably connected with the valve operating member.
5
[00017]
Another aspect of the present invention, the lower surface of the second portion may be configured to have a predetermined cross-section.
[00018]
Another aspect of the present invention, the valve operating assembly having one or more connecting openings, the one or more connecting openings may be configured to accommodate the valve operating assembly via the arm shaft. 5 one or more tappets, the one or more tappets may be operably connected with one or more pushrod, a first surface, the first surface may be configured to provide a free-play space for functioning of the second portion of the arm assembly.
[00019]
Another aspect of the present invention, an arm shaft assembly including a holding member, the holding member may be connected to the arm shaft, a 10 stopper, the stopper may be configured to accommodate the holding member, a one or more elastic members, the one or more elastic members may be configured to operably connected with the arm shaft.
[00020]
Another aspect of the present invention is that the holding member may be configured to rotate with respect to the arm shaft rotation. 15
[00021]
Another aspect of the present invention, the stopper having a first vacant portion and a second vacant portion. The first vacant portion and the second vacant portion may be configured to provide free movement space to the holding member.
[00022]
Another aspect of the present invention, the second vacant portion of the stopper may be provided to continue the rotation motion of the holding member 20 with respect to the arm shaft.
6
[00023]
Another aspect of the present invention, the one or more elastic members including a first member and a second member. The first member and the second member may be functionally different from each other.
[00024]
Another aspect of the present invention, the stopper may be configured to a pip and a hole. The pip may be configured to have a predetermined rotating 5 portion inside a cavity.
[00025]
Another aspect of the present invention, the predetermined rotating portion may be configured to provide a free-play time to the holding member.
[00026]
Another aspect of the present invention, a system for controlling an arm assembly, the system having a control unit. The control unit may be configured to 10 receive, from one or more sensors, one or more real time vehicle operating parameters. Compare, the one or more real time vehicle parameters based on a predetermined operating variable; and operate, one or more actuators to change the one or more operating positions of the arm assembly based on the comparison of the one or more real time vehicle parameters with the predetermined operating 15 variable.
[00027]
Another aspect of the present invention, a method for controlling an arm assembly, the method having detecting, by one or more sensors, one or more real time vehicle operating parameters. Computing, by a control unit, the one or more real time operating parameters with one or more predetermined threshold variables. 20 Determining, by the control unit, one or more operating positions of an arm assembly. Generating, by the control unit, one or more output signals, the one or more output signals being provided to one or more actuators. Receiving, by the one
7
or more actuators, the one or more output signals provided by the control unit.
Shifting, by the one or more actuators, the arm assembly at one or more operating positions.
BRIEF DESCRIPTION OF THE DRAWINGS
[00028]
The accompanying drawings, which are incorporated in and constitute a 5 part of this disclosure, illustrate exemplary embodiments and, together with the description, explain the disclosed principles. The detailed description of the present subject matter is described with reference to the accompanying figures. Same numbers are used throughout the drawings to reference features and components.
[00029]
Fig. 1 illustrates a front view of a drive unit, in accordance with an 10 embodiment of the present subject matter.
[00030]
Fig. 2 illustrates a front view of a plurality of cam lobes connected with a shaft, in accordance with an embodiment of the present invention.
[00031]
Fig. 3 illustrates an exploded view of a plurality of cam and the valve operating assembly, in accordance with an embodiment of the present invention. 15
[00032]
Fig. 4 illustrates a side view of a valve operating assembly, in accordance with an embodiment of the present invention.
[00033]
Fig. 5 illustrates a cut- section view of an arm shaft, in accordance with an embodiment of the present invention.
[00034]
Fig. 6 illustrates a top view of an arm assembly, in accordance with an 20 embodiment of the present invention.
[00035]
Fig. 7 illustrates a top view of the arm assembly in conjunction with the plurality of cam lobes, in accordance with an embodiment of the present invention.
8
[00036]
Fig. 8 illustrates a top view of the arm assembly in conjunction with the plurality of cam lobes, in accordance with another embodiment of the present invention.
[00037]
Fig. 9 illustrates a top view of the arm assembly in conjunction with the plurality of cam lobes, in accordance with another embodiment of the present 5 invention.
[00038]
Fig. 10 illustrates a side view of the arm assembly in conjunction with the plurality of cam lobes, in accordance with an embodiment of the present invention.
[00039]
Fig. 11 illustrates a side view of one or more tappets and one or more pushrods, in accordance with an embodiment of the present invention. 10
[00040]
Fig. 12 illustrates a side view of the plurality of cam lobs with the valve operating assembly, in accordance with an embodiment of the present invention.
[00041]
Fig. 13 illustrates a side view of a stopper of the arm shaft, in accordance with an embodiment of the present invention.
[00042]
Fig. 14 illustrates a system for controlling an arm assembly, in accordance 15 with an embodiment of the present invention.
DETAILED DESCRIPTION
[00043]
Exemplary embodiments are described with reference to the accompanying drawings. Wherever convenient, the same reference numbers are used throughout the drawings to refer to the same or like parts. While examples 20 and features of disclosed principles are described herein, modifications, adaptations, and other implementations are possible without departing from the spirit and scope of the disclosed embodiments. It is intended that the following
9
detailed description be considered as exemplary only, with the true scope and spirit
is indicated by the following claims.
[00044]
The embodiments of the present invention will now be described in detail with reference to a wheel along with the accompanying drawings. However, the present invention is not limited to the present embodiments. The present subject 5 matter is further described with reference to accompanying figures. It should be noted that the description and figures merely illustrate principles of the present subject matter. Various arrangements may be devised that, although not explicitly described or shown herein, encompass the principles of the present subject matter. Moreover, all statements herein reciting principles, aspects, and examples of the 10 present subject matter, as well as specific examples thereof, are intended to encompass equivalents thereof.
[00045]
The present invention relates to a drive unit, the power drive is configured to have a plurality of cam lobes. The plurality of cam lobes is operably connected with actuator device and an arm assembly. 15
[00046]
It is an object of the present invention to actuate a valve operating assembly through the actuating device to achieving different valve timings at two different cam lobes and different vehicle operating parameters.
[00047]
Yet another object of the present invention is to decrease the inertia of the power drive assembly to increase the performance of the drive unit. 20
[00048]
Referring to Figure 1 illustrates a drive unit 100. The drive unit 100 is configured to have an actuator device 102. In an embodiment, the drive unit 100 can be an internal combustion drive unit or a hybrid drive unit, further the actuator
10
device 102 can be a solenoid, a motor, a gear assembly. The actuator device 102 is
powered from a vehicle energy source (not shown). Further, the actuator device 102 is configured to provide a motion to an arm shaft 306 of the drive unit 100, the motion can be horizontal motion along the vehicle’s wheelbase, or the motion can be vertical at 90 degrees from the wheelbase of the vehicle. further the drive unit 5 100 is configured to have a cylinder head 108. The cylinder head 108 is connected a to a cylinder head of the drive unit 100.
[00049]
Referring to Figure 2 illustrates a perspective view of the drive unit 100. The drive unit 100 is configured to a cam shaft 204. The cam shaft 204 is configured with a plurality of cam lobe 208, 210, 216. In an embodiment the 10 plurality of cam lobes 208, 210, 216 comprising a first lobe 208, a second lobe 210 and a third lobe 216. Further, the first lobe 208 and a second lobe 210 are configured to have different cross-section but the first lobe 208 and the second lobe 210 are configured to perform a high lift operation and a low lift operation for an intake operation in the drive unit 100. In another embodiment, the first lobe 208 15 and the second lobe 210 can be configured to have similar cross-section. The third lobe 216 is configured to perform an exhaust operation in the drive unit 100. Further, the drive unit 100 is configured to have a roller 222. The roller 222 is configured to operably connected with the plurality of cam lobes 208, 210, 216. Further, the drive unit 100 is configured to have one or more elastic members 202, 20 304. The one or more elastic member 202, 304 are configured to have different operation connectivity. Further, the drive unit 100 is configured to have a plurality of pushrods 212, 214. The plurality of push rods 212, 214 are actuated by the roller
11
222 and the plurality of pushrods 212, 214 are configured to have one or more
valves 228, 230. In an embodiment, the roller 222 is operably connected to the first lobe 208 and the second lobe 210.
[00050]
Referring to Figure 3 illustrates an exploded view of a plurality of Cam lobes 208, 210, 216 and a valve operating assembly 308. The valve operating 5 assembly 308 is configured to have one or more connecting opening 220, 224. The one or more connecting openings 220, 224 comprising a first end 220 and a second end 224. In an embodiment, the first end 220 and the second end 224 are configured to operably connected with the arm assembly 314 and an arm shaft 306. In an embodiment, the first end 220 and the second end 224 are configured to provide 10 the free-play zone 218 for the axial movement of the arm assembly 314. The free-play zone 218 is configured to provide the adequate area for the movement of the arm shaft 306, further the arm shaft 306 is configured to provide the movement of the arm assembly 314. In an embodiment of the present invention the arm shaft 306 is configured to move the arm assembly 314 in a left and a right direction. 15 Further the arm shaft 306 is in a perpendicular direction from the valve operating assembly 308. In an embodiment, the arm shaft 306 can be assembled between the angle 60degrees to 100 degrees from the valve operating assembly 308. Further, the valve operating assembly 308 is configured to have a first surface 310. The first surface 310 is to provide a movement surface for one or more portion 316 of the 20 arm assembly 314. Further, the first end 220 and the second end 224 are provided with an opening to accommodate the arm shaft 306. Further, the arm assembly 314
12
is configured to have an arm member 313. The arm member 313 is configured to
accommodate the roller 222 between the walls of the arm member 313.
[00051]
Further, the fig. 3 illustrates the arm assembly 314. In an embodiment, the arm assembly 314 can have one or more rollers. In the present invention, the arm assembly 314 is configured to have at least one roller 222. Further, the arm 5 assembly 314 is configured to have one or more portions 315, 316. The one or more portions 315, 316 comprising a first portion 315 and a second portion 316. The arm assembly 314 is configured to have one or more openings 312. The one or more openings 312 is configured to accommodate the arm shaft 306. Further. The arm shaft 306 is configured to have an arm assembly mounting portion 311 10 and an opening for holding member 305. Further, the arm assembly mounting portion 311 of the arm shaft 306 is configured to provide the opening to detachably connect the arm assembly 314 to the arm shaft 306. In an embodiment, the arm assembly mounting portion 311 of the arm shaft 306 is configured to provide the opening to rigidly connect the arm assembly 314 to the arm shaft 306. In an 15 embodiment, the connection can be done by conventional methods such as fastening, welding, riveting and the like. Furthermore, the arm shaft 306 is configured to have an opening for a holding member 305. The opening for a holding member 306 is configured to accommodate a holding member 319, the holding member 319 can be connected via welding. The cam shaft 204 is 20 configured to connect with one or more bearing 318, 324 to the drive unit 100. The one or more bearing 318, 324 is configured to have a first bearing 318 and a second bearing 324. The first bearing 318 and the second bearing 324 are configured to
13
provide the rotating motion to the cam shaft 204. The drive unit 100 is configured
to have a stopper 302. The stopper 302 is configured to have a hole 323 and a pip 303, the stopper 302 is configured to connect the arm shaft 306 via a second elastic member 304. Further, a cavity 326 is configured to accommodate the stopper 302.
[00052]
Referring to Figure 4 the valve operating assembly 300 is operably 5 connected with the plurality of pushrods 212, 214 by a Left tappet 328 and a right tappet 330. In an embodiment, the left tappet 328 and the right tappet 330 is operably connected by the arm assembly 314, further the rotation of the cam shaft 204 tends to rotate the first lobe 208 and the second lobe 210 further the roller 222 connected to the arm assembly 314 tends to rotate and transfer a rotatory motion 10 of the roller 222 to a linear motion by the left tappet 328 and the right tappet 330 to actuate the plurality of pushrods 212, 214. Further, the plurality of pushrods 212, 214 are configured to transfer the linear motion to the one or more valves 228, 230. Furthermore, the one or more valves 228, 230 are configured to operate as the intake valves to provide the fuel mixture to a cylinder (not shown) of the drive unit 15 100.
[00053]
Referring to Figure 5 and Figure 13, an exploded view of the arm shaft 306 is provided. The arm shaft 306 is configured to oscillate in a left and right direction along an AA axis in an embodiment, an actuation device 102 is provided. The actuation device 102 is configured to provide the oscillation to the arm shaft 20 306 in the left and the right direction. Further, the arm shaft 306 is configured to rotate on its axis to transfer the motion to the left tappet 328 and the right tappet 330. In an embodiment, the actuator device 102 can be a solenoid, a servo motor,
14
a linear motor and the like. In the present invention, the actuator device 102 is the
solenoid. The solenoid tends to be communicably connected with a control unit (not shown), the control unit is configured to provide the signals based on a vehicle operating parameters, to transfer the arm shaft 306 from left to right or right to left direction. Further, the stopper 302 is configured to have a stopper opening 309, the 5 stopper opening 309 is provided to accommodate the arm shaft 306. The stopper opening 309 is provided to control the movement of the arm shaft 306. Further a holding member 319 is connected to the opening for the holding member 305, which then is configured to oscillate left to right or right to left and to rotate as per the rotation of the arm shaft 306. 10
[00054]
In a working example, when the actuator device 102 is configured to provide the force to the arm shaft 306 from right to left, the holding member 319 also tends to move with the arm shaft 306. Further, stopper 302 is configured to have a first vacant portion 332 and a second vacant portion 334, when the arm shaft 306 tends to move from right to left the holding member 319 tends to transfer from 15 the first vacant portion 332 and later the holding member 319 tends to travel inside the stopper 302 to the second vacant portion 334. Further, when the arm shaft 306 tends to travel the arm assembly 314 from the second cam lobe 210 to the first cam lobe 208. Further, when the arm shaft 306 is transferred to the extreme left position the first elastic member 202 tends to provide compression force to the arm shaft 20 306. Further, when the arm shaft 306 tends to travel from left to right the second elastic member 304 is provided for the smooth transfer as the stopper is provided with the hole 323 to connect with the second elastic member 304. In an
15
embodiment, the second elastic member 304 is a torsion spring. Further the stopper
provided with the pip 303 is configured to travel inside a third vacant portion 301 of the cavity 326. The third vacant portion 301 is provided inside the cavity 326, so that the holding member 319 tends to have some time gap to come out from the second vacant portion 334 and from the first vacant portion 332 of the stopper 302. 5
[00055]
Referring to the figure 6 in conjunction with figure 5, a top view of the valve operating assembly 308 with the arm assembly 314 is provided. The valve operating assembly 308 is configured to have a first tappet screw 340a and a second tappet screw 340b. The first tappet screw 340a and the second tappet screw 340b is provided to have the left tappet 328 and the right tappet 330. 10
[00056]
Referring to figure 7 in conjunction with figure 8, in figure 7 a working example 300a is provided. in this embodiment, the second cam lobe 210 is configured to perform high lift operation. In the high lift operation, the second cam lobe 210 tends to transfer the fuel to the cylinder at maximum pressure and speed. So, when a user is riding a vehicle at the high speed, the actuator device 102 tends 15 to actuate the arm shaft 306 and the arm shaft 306 will be transferred to the right direction, which then connects the arm assembly 314 with the second lobe 210. As the arm assembly 314 comes in connect with the second lobe 210, the roller 222 will actuate and then by the rotational motion of roller due to an extended second cam lob region 1010, the roller 222 tends to provide the translatory motion to the 20 valve operating assembly 308, which then by the plurality of tappets 328, 330 actuate the one or more valves 228, 230 of the drive unit 100. in figure 8 a working example 300a is provided. in this embodiment, the first cam lobe 208 is configured
16
to perform low lift operation. In the low lift operation, the first cam lobe 208 tends
to transfer the fuel to the cylinder at minimum pressure and speed. So, when a user is riding a vehicle at the low speed, the actuator device 102 tends to actuate the arm shaft 306 and the arm shaft 306 will be transferred to the left direction, which then connects the arm assembly 314 with the first lobe 208. As the arm assembly 314 5 comes in connect with the first lobe 208, the roller 222 will actuate and then by the rotational motion of roller due to an extended first cam lobe portion, the roller 222 tends to provide the translatory motion to the valve operating assembly 308, which then by the plurality of tappets 328, 330 actuate the one or more valves 228, 230 of the drive unit 100. 10
[00057]
Referring to figure 9 in conjunction with figure 10 and figure 11. In an embodiment of the present invention a rocker arm 402 is provided for actuation of the one or more valves 228, 230. The rocker arm 402 is configured to have a plurality of tappets 400a, 400A, 400b, 400B. the plurality of tappets 400a, 400A, 400b, 400B comprising a first tappet 400a, a second tappet 400A, a third tappet 15 400b and a fourth tappet 400B. The first tappet 400a and the second tappet 400A are configured to actuate a first valve 228. The third tappet 400b and fourth tappet 400B are configured to actuate a second valve 230. In an embodiment, when the actuation device 102 forces the rocker arm 402 to the left direction contact point of the plurality of pushrods 214, 216 tends to change from the first tappet 400a to 20 the second tappet 400A and from the third tappet 400b to forth tappet 400B.
[00058]
Referring to Figure 12, a side view of the arm assembly 314 and the valve operating assembly 308 is provided. The arm assembly 314 is provided with the
17
second portion 316 for providing the movement of the arm assembly 314 over the
valve operating assembly 308. The second portion 316 is configured to have a bottom surface 316a. The bottom surface 316a is configured to remain in contract with the valve operating assembly 308. The bottom surface 316a is configured to a predetermined shape. In an embodiment, the bottom surface 316a can have a 5 spherical, a flat, a ball, a point/ wedge, an elephant foot shape. In the present invention, the bottom surface 316a is configured to have a spherical shape.
[00059]
Referring to Figure 14 a system 700 for controlling the arm assembly 314 is provided. The system 700 is configured to have a one or more sensors 710. The one or more sensors 710 is configured to detect one or more real time vehicle 10 operating parameters. In an embodiment, the one or more real time vehicle operating parameters comprising a speed of the vehicle and a speed of the drive unit. Further, the one or more real time vehicle operating parameters are received by a control unit 720. The control unit 720 is configured to compare the one or more real time vehicle operating parameters with a one or more threshold variables. 15 The one or more threshold variables comprising a vehicle speed threshold and a power drive speed threshold. Further, based on the comparison one or more actuators 730 are configured to change one or more operating position 300a, 300b of the arm assembly 314. The one or more operating position 300a 300b comprising a first operating position 300a and a second operating position 300b. 20 The first operating position 300a of the arm assembly 314 tends to provide the low lift to the one or more valves 228, 230 and the second position 300b tends to provide the high lift to the one or more valves 228, 230.
18
[00060]
In view of the above, the claimed limitations as discussed above are not routine, conventional, or well understood in the art, as the claimed limitations enable the above solutions to the existing problems in conventional technologies.
[00061]
The claimed invention, as described, involves a specific and concrete system for operating a vehicle using a pressure-sensitive surface and associated 5 components.
[00062]
The claimed invention details a variety of specific operations associated with the drive unit of the vehicle which is provided with a single arm assembly for intake of the fuel. These specific functionalities demonstrate the practical and non-abstract nature of the invention. The choice and application of these technologies 10 contribute to the invention's non-abstract nature. The concept of assigning pre-defined pressure ranges to different operations, allowing for customization. This specific concept adds practical utility and non-obviousness to the invention, as it addresses the need for adaptable and personalized control interfaces.
[00063]
The inclusion of present invention tends to reduce the inertia of the drive 15 unit which increases the acceleration of the vehicle. Further the weight of the arm assembly is also reduced as the arm assembly was provided with two separate assembly. Further, the stopper provides the pip and hole which tends to restrict or enables the operation of arm shaft to move from left to right or right to left direction. The torsion spring which is connected to the hole of the stopper tends to 20 provide declaration or the force to return the arm shaft from left to right direction near the actuation device. Further Pip and vacant portion is provided to arrange the holder member at the position which tends to actuate the cam lobes.
19
[00064]
In summary, the claimed invention provides a specific, tangible, and practical solution to challenges in the drive unit inertia, making it non-abstract. The combination of specific components, functionalities, and applications, along with the customization and connectivity features, contributes to the non-obviousness of the invention to a person skilled in the art. In view of the above, the claimed 5 invention may not be considered abstract and may not be obvious to a person skilled in the art.
[00065]
The terms “an embodiment”, “embodiment”, “embodiments”, “the embodiment”, “the embodiments”, “one or more embodiments”, “some embodiments”, and “one embodiment” mean “one or more (but not all) 10 embodiments of the invention(s)” unless expressly specified otherwise. The terms “including”, “comprising”, “having” and variations thereof mean “including but not limited to”, unless expressly specified otherwise. The terms “a”, “an” and “the” mean “one or more”, unless expressly specified otherwise.
[00066]
Finally, the language used in the specification has been principally 15 selected for readability and instructional purposes, and it may not have been selected to delineate or circumscribe the inventive subject matter and is therefore intended that the scope of the invention be limited not by this detailed description, but rather by any claims that issue on an application based here on. Accordingly, the embodiments of the present invention are intended to be illustrative, but not 20 limiting, of the scope of the invention, which is set forth in the following claims.
[00067]
While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various
20
aspects and embodiments disclosed herein are for purposes of illustration and are
not intended to be limiting, with the true scope as indicated by the following claims.
5
10
15
20
21
REFRENCE NUMERALS
100- Drive unit
303-Pip
102- an actuator device
304- Second elastic member
104- fins
305-opening for holding member
106- Cylinder head
306-Arm shaft
307- Elongated portion
202- First elastic member
308- valve operating assembly
204- Cam shaft
310- First surface
208- First lobe
218- Free-play zone
210- Second lobe
312- one or more openings
212, 214- Plurality of pushrods
313-Arm member
216- Third lobe
314-Arm assembly
220- First end of a valve operating assembly
315- First portion
222- Roller
316- Second portion
316a- Bottom surface
311- Arm assembly mounting portion
224- second end of a valve operating assembly
318-first bearing
301- Third vacant portion
319-A holding member
302- Stopper
323-Hole
22
324-Second bearing
340a- First attaching member
326-Cavity
340b-Second attaching member
328-Left tappet
338-Third attaching member
330-Right tappet
402- Rocker arm
332- First vacant portion
400a- First Tappet
334-Second vacant portion
400A- Second tappet
400b-Third Tappet
400B- Fourth Tappet
700- System
710- one or more sensors
720- Control unit
730- One or more actuator , Claims:We claim:
1.
A drive unit (100), the drive unit (100) comprising:
one or more valves (228, 230);
at least one shaft (322), the at least one shaft (322) being configured to actuate the one or more valves (228, 230), 5
wherein, the at least one shaft (322) comprising;
a plurality of cam lobes (208, 210, 216), the plurality of cam lobes (208, 210, 216) being actuated by an actuator device (102) and an arm assembly (314) for operating at different vehicle operating parameters. 10
2.
The drive unit (100) as claimed in claim 1, wherein the plurality of cam lobes (208, 210, 216) comprising a first lobe (208), a second lobe (210) and a third lobe (216).
3.
The drive unit (100) as claimed in claim 1, wherein the first lobe (208) and the second lobe (210) being configured to actuate the one or more valves 15 (228, 230) of the power drive assembly (100).
4.
The drive unit (100) as claimed in claim 1, wherein the first lobe (208) being configured to perform a low lift operation and the second lobe (210) being configured to perform a high lift operation.
5.
The drive unit (100) as claimed in claim 1, wherein the arm assembly (314) 20
24
comprising:
a roller (222);
one or more openings (305, 311,312);
an arm (313), the arm (313) being configured to have one or more portions (315, 316); 5
one or more attaching members (604, 602a, 602b), the one or more attaching member (604, 602a, 602b) being configured to connect the one or more portions (315, 316) to an arm shaft (306) via one or more openings (305, 311, 312);
a valve operating assembly (308), the valve operating member 10 (308) being configured to accommodate the one or more portions (315, 316).
6.
The drive unit (100) as claimed in claim 5, wherein the roller (222) being configured to operably connected with the first lobe (208) and the second lobe (210) to perform the low lift and the high lift operation. 15
7.
The drive unit (100) as claimed in claim 5, wherein the one or more openings (305,311, 312) being configured to accommodate the arm shaft (306) and connects the arm (313) to the valve operating member (308).
8.
The drive unit (100) as claimed in claim 5, wherein the arm (313) comprising a first portion (315) and a second portion (316), wherein the 20
25
first portion (315) and the second portion (316) being configured to have
different cross-section.
9.
The drive unit (100) as claimed in claim 8, wherein the second portion (316) being configured to have a bottom surface (316a) , the bottom surface (316) being operably connected with the valve operating member (308). 5
10.
The drive unit (100) as claimed in claim 9, wherein the bottom surface (316) of the second portion (316) being configured to have a predetermined cross-section.
11.
The drive unit (100) as claimed in claim 5, wherein the valve operating assembly (308) comprising: 10
one or more connecting openings (220, 224), the one or more connecting openings (220, 224) being configured to accommodate the valve operating assembly (308) via the arm shaft (306)
one or more tappet (904a, 904b), the one or more tappet (904a, 904b) being operably connected with one or more pushrod (214, 15 212);
a first surface (310), the first surface (310) being configured to provide a free-play space for functioning of the second portion (316) of the arm assembly (314).
12.
The drive unit (100) as claimed in claim 1, wherein an arm shaft assembly 20
26
(500) comprising:
a holding member (319), the holding member (319) being connected to the arm shaft (306);
a stopper (302), the stopper (302) being configured to accommodate the holding member (319); 5
a one or more elastic members (202, 304), the one or more elastic members (202, 304) being configured to operably connected with the arm shaft (306).
13.
The drive unit (100) as claimed in claim 12, wherein the holding member (319) being configured to rotate with respect to the arm shaft (306) rotation. 10
14.
The drive unit (100) as claimed in claim 12, wherein the stopper (302) comprising a first vacant portion (332) and a second vacant portion (334), the first vacant portion (332) and the second vacant portion (334) being configured to provide free movement space to the holding member (319).
15.
The drive unit (100) as claimed in claim 13, wherein the second vacant 15 portion (334) of the stopper (302) being provided to continue the rotation motion of the holding member (319) with respect to the arm shaft (306).
16.
The drive unit (100) as claimed in claim 12, wherein the one or more elastic members (202, 304) comprising a first member (202) and a second member (304), the first member (202) and the second member (304) being 20
27
functionally different from each other.
17.
The drive unit (100) as claimed in claim 12, wherein the stopper (302) being configured to a pip (303) and a hole (323), the pip (303) being configured to have a third vacant portion (301) inside a cavity (326).
18.
The drive unit (100) as claimed in claim 17, wherein the third vacant 5 portion (301) being configured to provide a free-play time to the holding member (319).
19.
A system (700) for controlling an arm assembly (314), the system (700) comprising:
a control unit (720), the control unit (720) being configured to: 10
receive, from one or more sensors (710), one or more real time vehicle operating parameters;
compare, the one or more real time vehicle parameters based on one or more threshold variable; and
operate, one or more actuators (730) to change the one or 15 more operating positions (300a, 300b) of the arm assembly (314) based on the comparison of the one or more real time vehicle parameters with the one or more threshold variable;
20.
A method for controlling an arm assembly (314), the method comprising:
detecting, by one or more sensors (710), one or more real time 20
28
vehicle operating parameters;
computing, by a control unit (720), the one or more real time operating parameters with one or more threshold variables;
determining, by the control unit (720), one or more operating position (300a, 300b) of an arm assembly (314); 5
generating, by the control unit (720), one or more output signals, the one or more output signals being provided to one or more actuators (730);
receiving, by the one or more actuators (730), the one or more output signals provided by the control unit (720); 10
shifting, by the one or more actuators (730), the arm assembly (314) at one or more operating positions (300a, 300b).