Description:TECHNICAL FIELD
[0001] The present subject matter relates generally to an engine assembly for a two or three-wheeled vehicle, and more particularly but not exclusively to an oil filler for the engine assembly.
BACKGROUND
[0002] Generally, a vehicle comprises of a frame assembly extending rearwardly from a head tube. The frame assembly acts as a skeleton and a structural member for the vehicle that supports the vehicle loads. At least one front wheel is connected to a front portion of the frame assembly through one or more front suspension(s). The frame assembly extends towards a rear portion of the vehicle. At least one rear wheel is connected to a frame assembly through one or more rear suspension(s). The frame assembly comprises of an engine assembly coupled to it. The engine assembly is functionally connected to the rear wheel, which provides forward motion to the vehicle. These vehicles incorporating the internal combustion engine are powered by gasoline.
[0003] Conventionally, in a vehicle the oil filler is provided to fill the engine assembly with a fluid. A transmission system generally consists of a clutch, a gearbox and a propeller (prime mover). There is a continuous metal-on-metal contact between these parts, causing severe heat generation and damage. To maintain the efficacy of the entire transmission system a lubricating fluid is provided within the transmission system such that the entire transmission system is immersed in the fluid. The fluid is generally an oil of suitable viscosity.
[0004] Conventionally, an oil filler gauge, is positioned at an upper portion of the engine casing towards the rear of the vehicle near to the kickstarter assembly. Positioning the oil filler near the kickstarter assembly at a higher position requires a long stem/conduit that is configured to transmit oil to the transmission chamber that then percolates to the oil pan/oil tray and then is pumped again. Placement of the oil filler towards the rear of the engine assembly, with the oil filler having a long stem forming a conduit to transmit fluid to the transmission chamber causes consistent displacement of the oil level because of which the oil level that is viewed through the oil level gauge is not accurate.
[0005] Therefore, there is a need in the art to provide the oil filler at a position that eliminates a requirement for a long conduit and allows for greater area to the components within the transmission chamber. There is also a need for an oil filler that is located away from external moving components of the engine, such as a kickstarter assembly.
SUMMARY
[0006] The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description. The present invention discloses a cost-effective solution in the form of a protection circuit which addresses the exact drawback of the above-mentioned prior arts.
[0007] An aspect of the present disclosure pertains to an engine assembly for a vehicle. The engine assembly includes a cylinder block with a cylinder head disposed on the cylinder head cover. The cylinder head cover encloses a portion of the cylinder head. A transmission member is provided within the cylinder head and the cylinder head cover that transmits the rotary motion to the drive wheel. The transmission member is enclosed within a clutch cover forming a transmission chamber. The clutch cover includes an oil filler provided on an outer surface of the clutch cover.
[0008] In an embodiment, the transmission member includes at least one of a clutch, a crankshaft and an oil filter that are provided above an axis A’A.
[0009] In another embodiment, the oil filler may be disposed on the outer surface of said clutch cover below the axis A’A.
[00010] In yet another embodiment, the oil filler may be provided on a projection. The said projection protruding outwardly from the outer surface of the clutch cover.
[00011] In yet another embodiment, the projection may be of a conical shape and may include a hollow cavity forming a conduit to transmit a fluid received from the oil filler to the transmission chamber through an orifice provided on an inner surface of the clutch cover.
[00012] In an embodiment, the projection may be configured to receive an oil filler cap to close the oil filler.
[00013] In yet another embodiment, the oil filler cap includes a shank having threads on an inner side of said oil filler cap and a holding knob on an outer side of said oil filler cap.
[00014] In yet another embodiment, the shank of the oil filler cap is adapted to mesh with threads provided in the conduit within the projection.
[00015] In yet another embodiment, the shank having threads is adapted to screw into threads provided on an internal surface of said projection.
[00016] In yet another embodiment, the oil filler being provided closer to a ground level of the vehicle.
BRIEF DESCRIPTION OF THE DRAWINGS
[00017] 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 like features and components. The present invention will become more fully understood from the detailed description given herein below and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present invention, and wherein
[00018] Fig. 1 illustrates a left side view of an exemplary two-wheeled vehicle 200, comprising an engine assembly 100 in accordance with an embodiment of the present subject matter.
[00019] Fig. 2 depicts a right-side view of the engine assembly 100, in accordance with the embodiment.
[00020] Fig. 3 illustrates a left view of a clutch cover 206 assembled to the crankcase of the engine assembly 100.
[00021] Fig. 4 is a right a right-side isometric view of the clutch cover 206 showing the oil filler 302.
[00022] Fig. 5 illustrates the isometric view of the oil filler 302 and an oil filler cap 312 of the oil filler 302.
[00023] Fig. 6 is an exploded view of the engine assembly 100 illustrating the clutch cover 206.
DETAILED DESCRIPTION
[00024] The present disclosure may be best understood with reference to the detailed figures and description set forth herein. Various embodiments are discussed below with reference to the figures. However, those skilled in the art will readily appreciate that the detailed descriptions given herein with respect to the figures are simply for explanatory purposes as the methods and systems may extend beyond the described embodiments. For example, the teachings presented and the needs of a particular application may yield multiple alternative and suitable approaches to implement the functionality of any detail described herein. Therefore, any approach may extend beyond the particular implementation choices in the following embodiments described and shown.
[00025] References to “one embodiment,” “at least one embodiment,” “an embodiment,” “one example,” “an example,” “for example,” and so on indicate that the embodiment(s) or example(s) may include a particular feature, structure, characteristic, property, element, or limitation but that not every embodiment or example necessarily includes that particular feature, structure, characteristic, property, element, or limitation. Further, repeated use of the phrase “in an embodiment” does not necessarily refer to the same embodiment.
[00026] The present invention now will be described more fully hereinafter with different embodiments. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather those embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the invention to those skilled in the art.
[00027] Typically, in a two-wheeled vehicle, the engine assembly is mounted to the body frame or is swingably connected to the frame assembly. The engine assembly is provided with an air supply system and a fuel supply system that supply air-fuel mixture from an air filter and a fuel tank respectively. Combustion of air-fuel mixture takes place in a cylinder portion of the engine assembly. The combustion process either in two-stroke or four-stroke engine creates reciprocating motion of a piston disposed therein. The reciprocating motion of the piston is converted into rotary motion of the crankshaft thereby generating desired power/torque that gets transmitted to at least one wheel of the vehicle.
[00028] Typically, a two-wheeled vehicle is operated through an engine assembly which is horizontally coupled to the rear end of the frame assembly and a fuel tank disposed between the rear portions of the pair of the side tubes. Air fuel mixture is supplied to the engine assembly by means of a carburetor. Thereafter combustion of the air fuel mixture takes place so that a piston disposed in the engine assembly is set into motion. The piston is operated in a linear motion, after which said liner motion is converted to a rotational motion, wherein said rotational motion is transferred to the rear wheel finally resulting into motion of the vehicle. This mechanism also results in generation of power and torque by the engine assembly. Generally, the oil filler is provided on the rear side of the engine, closer to the kickstarter. In certain instances, the oil filler and the oil gauge are combined to form one single entity.
[00029] Conventionally, an oil filler gauge, is positioned at an upper portion of the engine casing towards the rear of the vehicle near to the kickstarter assembly. Positioning the oil filler near the kickstarter assembly at a higher position requires a long stem/conduit that is configured to transmit oil to the transmission chamber that then percolates to the oil pan/oil tray and then is pumped again.
[00030] It is an object of the invention to provide the oil filler at a position that eliminates a requirement for a long conduit and allows for increased space to accommodate the transmission components within the transmission chamber.
[00031] Further, the oil level gauge and the oil filler are usually combined as a single entity. Hence, with length of the stem of the oil filler being long, the level of oil within the stem is unstable because of ripples caused within the oil because of the moving transmission components. There are possibilities for error in the readings on the oil level gauge due to the movement of components within the transmission chamber that lead to displacement of the oil within the transmission chamber.
[00032] It is another object of the invention to provide the oil filler at a location for that ensures accuracy of readings in of the oil gauge.
[00033] In an embodiment, the transmission member includes at least one of a clutch, a crankshaft and an oil filter that are provided above an axis A’A.
[00034] In another embodiment, the oil filler may be disposed on the outer surface of said clutch cover below the axis A’A.
[00035] In yet another embodiment, the oil filler may be provided on a projection. The said projection protruding outwardly from the outer surface of the clutch cover.
[00036] In yet another embodiment, the projection may be of a conical shape and may include a hollow cavity forming a conduit to transmit a fluid received from the oil filler to the transmission chamber through an orifice provided on an inner surface of the clutch cover.
[00037] In an embodiment, the projection may be configured to receive an oil filler cap to close the oil filler.
[00038] In yet another embodiment, the oil filler cap includes a shank having threads on an inner side of said oil filler cap and a holding knob on an outer side of said oil filler cap.
[00039] In yet another embodiment, the shank of the oil filler cap is adapted to mesh with threads provided in the conduit within the projection.
[00040] In yet another embodiment, the shank having threads is adapted to screw into threads provided on an internal surface of said projection.
[00041] In yet another embodiment, the oil filler being provided closer to a ground level of the vehicle.
[00042] The embodiments of the present invention will now be described in detail with reference to an engine having an oil filler, along with the accompanying drawings. However, the present invention is not limited to the present embodiments. The present subject 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 present subject matter, as well as specific examples thereof, are intended to encompass equivalents thereof.
[00043] Fig. 1 illustrates a left side view of an exemplary two-wheeled vehicle 200, in accordance with an embodiment of the present subject matter. Arrows provided in the top right corner of each figure depicts direction with respect to the vehicle, wherein an arrow F denotes front direction, an arrow R indicates rear direction, an arrow Up denotes upward direction, and an arrow Dw denotes downward direction. The vehicle 200 includes a frame assembly 201 that extends rearward from a head tube 201A. The frame assembly 201 extends along in a longitudinal direction F-R of the vehicle 200. The frame assembly 201 includes a mainframe comprising a main tube 201B extending rearward from a rear portion of the head tube 201A and a down tube 201C that extends rearwardly downward from the head tube 201A. The frame assembly 201 may further comprise a sub-frame formed by a pair of rear tubes that extend obliquely rearward from the main frame. An engine assembly 100 is mounted to the main frame of the frame assembly 201.
[00044] The engine assembly 100 acts as the power unit of the vehicle 200, wherein the power unit may also include a traction/electrical motor (not shown). The engine assembly 100 is coupled to an exhaust assembly 110 that scavenges exhaust gases there through. A front portion of a swing arm 115 is swingably connected to the frame assembly 201 and a rear portion of the swing arm 115 rotatably supports a rear wheel 120. The rear wheel 120 is functionally coupled to the engine assembly 100 through a transmission (also referred to as a transmission system/ transmission member/ transmission components throughout the entirety of this document) 125. In a preferred embodiment, the transmission system 125 includes a chain drive coupled to an output of manual gear transmission. The transmission system is immersed in a fluid for lubrication when the power is transmitted by the transmission system to the drive wheel. However, the transmission system 125 may include an automatic transmission or continuously variable transmission. Further, the swing arm 115 is coupled to the frame assembly 201 through one or more rear suspension(s) (not shown). In the present embodiment, a mono-shock rear suspension connects the swing arm 115 to the frame assembly 201. Similarly, a pair of front forks 130 supports a front wheel 135 and is steerably supported by the head tube 201A. A handlebar assembly 140 is connected to an upper portion of the pair of front forks 130. Further, a front fender 145 covers at least a portion of the front wheel 135 and the front fender assembly 145 is mounted to the front forks 130.
[00045] A fuel tank 150 is mounted to the main tube 201B of the frame assembly 201 and disposed rearwardly of the handlebar assembly 140. A seat assembly including a rider seat 155 and a pillion seat 160 is disposed rearwardly of the fuel tank assembly 150 and is supported by the rear tubes. A pair of rider foot pegs 165 is disposed on either sides and is mounted to the frame assembly 201 of the vehicle that supports rider foot. A rear fender 170 is disposed upwardly of the rear wheel 120 covering at least a portion of the rear wheel 120.
[00046] Further, the engine assembly 100 is functionally coupled to an air-fuel supply system (not shown) that supplies air and fuel to the engine assembly 100. The torque/power output of the engine assembly 100 is transferred to a drive sprocket (not shown). A chain drive 125 is coupled to the drive sprocket. A sprocket cover encloses the drive sprocket and at least a portion of the chain drive 125.
[00047] Furthermore, the vehicle 200 includes various electrical and electronic systems including a starter motor (not shown), a headlamp 175, a vehicle control unit, and a tail lamp 180. In addition, the vehicle includes safety systems including a synchronous braking system (not shown), and an anti-lock braking system.
[00048] Fig. 2 depicts a right-side view of the engine assembly 100, in accordance with the embodiment. In the present embodiment, the engine assembly 100 includes at least one cylinder head 102 comprising at least one intake valve (not shown) and at least one exhaust valve (not shown). The cylinder head 102 is mounted to a cylinder block 101. The cylinder block 101 defines a cylinder portion and a piston (not shown) is radially enclosed by the cylinder portion. The cylinder head 102 is covered by a cylinder head cover 109 from a top direction. The cylinder block 101 is mounted to a crankcase 202. In the present embodiment, the engine assembly 100 is forwardly inclined type. The inclination is of a piston axis defined by reciprocating motion of the piston. In another embodiment, a vertical or a horizontal engine may be used. The cylinder head 102 includes one or more ports.
[00049] The crankcase 202 rotatably supports plurality of engine components including the crankshaft. The reciprocating motion of the piston is converted into the rotary motion of the crankshaft. Further, the engine assembly 100 includes a clutch assembly (not shown) mounted on one lateral side of the engine assembly and a magneto or an integrated starter generator (not shown) is mounted to another side of the engine assembly 100. The clutch assembly is enclosed by a clutch cover 206 that is mounted to the crankcase 202. The chain drive and the entire transmission system 125 is enclosed within the clutch cover 206. The clutch cover 206 has an inner surface facing the transmission components 125 and the outer surface exposed to the environment. The inner surface of the clutch cover 206 is in contact with the fluid within the transmission chamber that houses the transmission components 125.
[00050] Similarly, the magneto (not shown) is enclosed by a magneto cover (not shown) that is mounted to the crankcase 202. In the present embodiment, the clutch cover 206 is disposed on the right-hand side RH of the engine assembly 100. A gear actuation drum (not shown) is coupled to a gear arm that is coupled to a gearshift lever for shifting gears. In addition, a sensor is mounted to the crankcase body for identifying the gear position. In one embodiment, the sensor is mounted to identify the crankshaft speed.
[00051] Fig. 3 illustrates a left view of a clutch cover 206 assembled to the crankcase 202. The clutch cover 206 is mounted onto the crankcase 202 by a plurality of fasteners 310-1, 310-2….310-n. The clutch cover 206 has an oil level gauge 306 disposed on the clutch cover 206. The oil level gauge (306)indicates the level of oil within the engine assembly 100. In an embodiment, the oil level gauge 306 is provided adjacent to a kickstarter assembly (not shown) to start the engine. The oil filler 302 is provided on a projection 304 that protrudes outwardly from the top surface of the clutch cover 206. In an embodiment, the projection 304 accommodates the oil filler 302 and has a conduit disposed within the projection throughout the length of the projection thereby enabling entry of a fluid through the oil filler 302 and transmitting the fluid received from the oil filler 302 into the transmission chamber. The oil level gauge 306 is provided on the clutch cover 206 to enable inspection of the oil levels within the transmission chamber being enclosed by the clutch cover 206.
[00052] In an embodiment, the projection 304 is disposed below axes of the clutch (not shown), the crankshaft (not shown), and the oil filter.
[00053] Fig. 4 is a right-side isometric view of the clutch cover 206 showing the oil filler 302. The oil filler 302 is provided on the projection 304 that protrudes outwardly from the top surface of the clutch cover 206. The projection 304 accommodates the oil filler 302 and has a conduit disposed within the projection throughout the length of the projection thereby enabling entry of a fluid through the oil filler 302 and transmitting the fluid received from the oil filler 302 into the transmission chamber. The oil level gauge 306 is disposed on the surface of the clutch cover 206 for monitoring of the oil level within the transmission chamber. projection 304 is disposed below axes of the clutch (not shown), the crankshaft (not shown), and the oil filter.
[00054] Fig. 5 illustrates the isometric view of the oil filler 302 and a cap 312 of the oil filler 302. The projection 304 accommodates the oil filler 302 and has a conduit disposed within the projection throughout the length of the projection thereby enabling entry of a fluid through the oil filler 302 and transmitting the fluid received from the oil filler 302 into the transmission chamber. The oil level gauge 306 is disposed on the surface of the clutch cover 206 for monitoring of the oil level within the transmission chamber. An upper side of the cap 312 of the oil filler 302 is provided with a protruding shape to hold the cap and tighten it within threads provided on the inner surface of the projection 304. A lower side of the cap 312 is provided with a shank having threads that mesh with the threads provided on the inner surface of the conduit within the projection 304.
[00055] Fig. 6 is an exploded view of the engine assembly 100 illustrating the clutch cover 206. The clutch cover 206 on assembly around the transmission system 125 Creates a cavity surrounding the transmission system/mechanism. The transmission system is housed within the clutch cover 206 and immersed in a fluidic medium. The oil filler 302 is configured to receive a fluid that is to be filled within the transmission chamber. The oil level gauge 306 is shown disposed on the clutch cover 206. The oil level gauge (306) indicates the level of oil within the engine assembly 100. The oil filler 302 is shown, provided on a projection 304 that protrudes outwardly from the top surface of the clutch cover 206. In an embodiment, the projection 304 accommodates the oil filler 302 and has a conduit disposed within the projection throughout the length of the projection thereby enabling entry of a fluid through the oil filler 302 and transmitting the fluid received from the oil filler 302 into the transmission chamber.
[00056] The projection 304 is disposed below axes of the clutch, the crankshaft, and the oil filter. The location of the oil filler being bottom to the plane of the crankshaft, and the axis of the oil filter improves the durability and lifetime of the oil filler 302. Conventionally, the oil filler 302 is provided adjacent to the kickstart assembly on the engine 100. The durability of the oil filler 302 is enhanced in view of the offset from the kickstart assembly. Referring now to Fig. 6, the Axis A’A illustrates an imaginary place below which, the oil filler 302 is provided. The Axis A’A is an imaginary axis that is below the axis of mounting of the clutch, the crankshaft and the oil filter.
[00057] Furthermore, the oil filler 302 is provided separately from the oil level gauge 306 which ensures easy accessibility of the oil filler 302 for opening the oil filler cap 312 and filling in a fluid within the transmission chamber.
[00058] Furthermore, the positioning of the oil filler 302 separately from the oil level gauge 306, ensures easy visibility of the oil level gauge 306 providing greater accuracy in oil level reading.
[00059] Furthermore, the projection 304 is disposed below axes of the clutch, the crankshaft, and the oil filter. The location of the oil filler being bottom to the plane of the crankshaft, reduces length of the oil filler stem thereby allowing greater space within the transmission chamber to accommodate the transmission components.
[00060] 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) 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.
[00061] In light of the above-mentioned advantages and the technical advancements provided by the disclosed method and system, the claimed steps as discussed above are not routine, conventional, or well understood in the art, as the claimed steps enable the following solutions to the existing problems in conventional technologies. Further, the claimed steps clearly bring an improvement in the functioning of the device itself as the claimed steps provide a technical solution to a technical problem.
[00062] A description of an embodiment with several components in communication with another does not imply that all such components are required, On the contrary, a variety of optional components are described to illustrate the wide variety of possible embodiments of the invention,
[00063] Finally, the language used in the specification has been principally 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 limiting, of the scope of the invention, which is set forth in the following claims.
[00064] While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.
[00065] A person with ordinary skills in the art will appreciate that the systems, modules, and sub-modules have been illustrated and explained to serve as examples and should not be considered limiting in any manner. It will be further appreciated that the variants of the above disclosed system elements, modules, and other features and functions, or alternatives thereof, may be combined to create other different systems or applications.
[00066] Those skilled in the art will appreciate that any of the aforementioned steps and/or system modules may be suitably replaced, reordered, or removed, and additional steps and/or system modules may be inserted, depending on the needs of a particular application. In addition, the systems of the aforementioned embodiments may be implemented using a wide variety of suitable processes and system modules, and are not limited to any particular computer hardware, software, middleware, firmware, microcode, and the like. The claims can encompass embodiments for hardware and software, or a combination thereof.
[00067] While the present disclosure has been described with reference to certain embodiments, it will be understood by those skilled in the art that various changes may be made, and equivalents may be substituted without departing from the scope of the present disclosure. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the present disclosure without departing from its scope. Therefore, it is intended that the present disclosure is not limited to the particular embodiment disclosed, but that the present disclosure will include all embodiments falling within the scope of the appended claims.
[00068] It is to be understood that the aspects of the embodiments are not necessarily limited to the features described herein. Many modifications and variations of the present subject matter are possible in the light of above disclosure. Therefore, within the scope of claims of the present subject matter, the present disclosure may be practiced other than as specifically described.
, Claims:We claim:
1. An engine assembly (100) for a vehicle (200), said engine assembly (100) comprising:
a cylinder block (101);
a cylinder head (102) disposed on said cylinder block (101);
a cylinder head cover (109) configured to enclose at least a portion of said cylinder head (102), said cylinder head (102) and cylinder head cover (109) enclosing a crankshaft in operative coupling with a transmission member (125); and
a clutch cover (206), enclosing said transmission member (125) forming a transmission chamber;
wherein said clutch cover (206) includes an oil filler (302), said oil filler (302) being provided on an outer surface of said clutch cover (206).

2. The engine assembly (100) as claimed in claim 1, wherein said transmission member (125) includes at least one of a clutch, the crankshaft and an oil filter being provided above an axis A’A.

3. The engine assembly (100) as claimed in claim 1, wherein said oil filler (302) being disposed on the outer surface of said clutch cover (206) below said imaginary axis A-A’ passing below an axis of mounting of said clutch, said crankshaft and said oil filter. .

4. The engine assembly (100) as claimed in claim 1, wherein said oil filler (302) being provided on a projection (304), said projection (304) protruding outwardly from the outer surface of the clutch cover (206).

5. The engine assembly (100) as claimed in claim 4, wherein said projection (304) including a hollow cavity forming a conduit to transmit a fluid received from the oil filler (302) to the transmission chamber through an orifice provided on an inner surface of said clutch cover (206).

6. The engine assembly (100) as claimed in claim 4, wherein said projection (304) being configured to receive an oil filler cap (312) to close said oil filler (302).

7. The engine assembly as claimed in claim 6, wherein said oil filler cap (312) includes a shank having threads on an inner side of said oil filler cap (312) and a holding knob on an outer side of said oil filler cap (312).

8. The engine assembly as claimed in claim 7, wherein said shank of said oil filler cap (312) being adapted to mesh with threads provided in the conduit within the projection (304).

9. The engine assembly as claimed in claim 4, wherein said shank having threads being adapted to screw into threads provided on an internal surface of said projection (304).

10. The engine assembly (100) as claimed in claim 1, wherein said oil filler (206) being provided closer to a ground level of the vehicle (200).

11. The engine assembly (100) as claimed in claim 1, wherein said oil filler (302) being provided on a front side of said engine assembly (100).