Description:FIELD OF THE INVENTION
[001] The present invention relates to a valvetrain assembly for an engine.

BACKGROUND OF THE INVENTION
[002] It is a known fact that, an Internal Combustion Engine (ICE) comprises a cylinder block, a cylinder head, a cylinder head cover and a crankcase including an oil pan. The cylinder block accommodates a cylinder, a piston, and a crank pin. The cylinder head also comprises an ignition plug and a valvetrain assembly. The valvetrain assembly includes an intake valve and an exhaust valve, a rocker arm and a push rod. The intake valve allows air and/or fuel into the cylinder, while the ignition plug ignites the air-fuel mixture within the cylinder for combustion. The combustion results in generation of drive torque, which is transmitted suitably for use. The exhaust valve discharges combustion gases from the cylinder to surroundings via an exhaust pipe.
[003] Further, the push rod has one end coupled to a crankshaft and other end coupled to a camshaft, which in-turn is coupled to the intake and exhaust valves through a rocker-arm assembly. As such, during operation of the ICE, drive from the crankshaft is transferred to the camshaft via the push rod, which operates the rocker-arm assembly suitably for opening or closing the intake and exhaust valves. Thus, the valvetrain assembly controls timing and amount of air-fuel mixture entering the cylinder.
[004] However, the valvetrain assembly contribute to friction losses that are produced due to multiple moving parts. Such unwanted friction losses further lead to heat generation, wear and tear, and vibrations due to undesired unbalanced rocking or rotational masses. Further, such conventional valvetrain parts also tends to make the cylinder head heavy, bulky making the packaging of the valvetrain assembly inside the cylinder head congested. Additionally, recent advancements have introduced new technologies in the engine assembly such as Variable Valve Actuation (VVA) and Variable Compression Ratio (VCR) for improving operation of the ICE. However, such advancements further add onto components in the valvetrain assembly, thereby aggravating the problems existing in the conventional ICE.
[005] In view of the above, there is a need for a valvetrain assembly for an engine, which addresses one or more limitations stated above.

SUMMARY OF THE INVENTION
[006] In one aspect, a valvetrain assembly for an engine is disclosed. The valvetrain assembly comprises at least one valve motor disposed in a cylinder head of the engine. At least one cam lobe is coupled to the at least one valve motor, each of the at least one cam lobe being driven by the at least one valve motor. One or more valve members is disposed in the cylinder head, wherein each of the one or more valve members are disposed within a valve seat provided in the cylinder head. A rocker fork assembly is pivotally supported on the cylinder head and pivotally connected to the one or more valve members. The rocker fork assembly is adapted to engage with the at least one cam lobe, wherein the rocker fork assembly is adapted to enable reciprocatory movement of the one or more valve members about the valve seat based on the drive received by the at least one cam lobe from the at least one valve motor.
[007] In an embodiment, each of the at least one valve motor is communicably coupled to an Electronic Control Unit (ECU) of the vehicle.
[008] In an embodiment, the ECU is communicably coupled to a crank position sensor for determining position of a crankshaft of the engine. The ECU is configured to actuate each of the at least one valve motor for correspondingly operating the one or more valve members based on position of the crankshaft.
[009] In an embodiment, the rocker fork assembly comprises a body member, a top arm extending forwardly from the body member and a bottom arm extending forwardly from the body member. A top leg extends rearwardly from the body member and adapted to engage with an upper portion of a head of the one or more valve members. A bottom leg extends rearwardly from the body member and is adapted to engage with a lower portion of the head of the one or more valve members.
[010] In an embodiment, the body member is defined with an opening for receiving a support shaft provided on the cylinder head. The support shaft is adapted to pivotally support the body member on the cylinder head.
[011] In an embodiment, the top arm and the bottom arm of the body member are provided with a tapered structure for facilitating surface contact with the at least one cam lobe during rotation of the at least one cam lobe.
[012] In an embodiment, the at least one cam lobe comprises a top portion and a bottom portion adapted to selectively engage with the top arm and the bottom arm based on drive received from the at least one valve motor. The selective engagement between the top arm and the bottom arm enables oscillatory movement of the rocker fork assembly about an opening to enable reciprocatory movement of the one or more valves about the valve seat.
[013] In another aspect, the engine is disclosed. The engine comprises a cylinder mounted on a frame of the vehicle and a cylinder head. The valvetrain assembly is disposed in the cylinder head. The valvetrain assembly comprises the at least one valve motor and the at least one cam lobe coupled to the at least one valve motor. Each of the at least one cam lobe is driven by the at least one valve motor. The one or more valve members is disposed within the cylinder head, wherein each of the one or more valve members are disposed in the valve seat provided in the cylinder head. The rocker fork assembly is pivotally connected to the one or more valve members and adapted to engage with the at least one cam lobe. The rocker fork assembly is adapted to enable reciprocatory movement of the one or more valve members about the valve seat based on the drive received by the at least one cam lobe from the at least one valve motor.

BRIEF DESCRIPTION OF THE DRAWINGS
[014] Reference will be made to embodiments of the invention, examples of which may be illustrated in accompanying figures. These figures are intended to be illustrative, not limiting. Although the invention is generally described in context of these embodiments, it should be understood that it is not intended to limit the scope of the invention to these particular embodiments.
Figure 1 is a perspective view of a vehicle, in accordance with exemplary an embodiment of the present disclosure.
Figure 2 is a perspective view of a valvetrain assembly for an engine, in accordance with an exemplary embodiment of the present disclosure.
Figure 3 is a perspective view of the valvetrain assembly for the engine, in accordance with an exemplary embodiment of the present disclosure.
Figure 4 is a top view of the valvetrain assembly for the engine, in accordance with an exemplary embodiment of the present disclosure.
Figure 5 is a perspective view of the valvetrain assembly without the valve motor, in accordance with an exemplary embodiment of the present disclosure.
Figure 6 is a perspective view of the valvetrain assembly without the valve motor and a cam lobe, in accordance with an exemplary embodiment of the present disclosure.
Figure 7 is a top view of a cylinder of an engine, in accordance with an exemplary embodiment of the present disclosure.
Figure 8 is a block diagram depicting an electronic control unit being communicably coupled to a crank position sensor and the valve motor of the valvetrain assembly, in accordance with an exemplary embodiment of the present disclosure.

DETAILED DESCRIPTION OF THE INVENTION
[015] Various features and embodiments of the present invention here will be discernible from the following further description thereof, set out hereunder.
[016] Figure 1 illustrates a perspective view of a vehicle 200, in accordance with an embodiment of the present invention. As an example, the vehicle 200 is a two-wheeled vehicle. The vehicle 200 comprises an engine 202 that is adapted to provide motive force required for movement of the vehicle 200. In an embodiment, the engine 202 is an internal combustion engine, preferably a single-cylinder engine. The engine 202 is provided with a cylinder 212 (shown in Figure 7) adapted to receive and combust an air-fuel mixture for generating motive force. Over the cylinder 212, a cylinder head 204 (shown in Figure 7) is provided. In the cylinder head 204, a valvetrain assembly 100 is disposed, which will be described in detail in description pertaining to Figures 2-8.
[017] Further, the vehicle 200 has a front wheel 214, a rear wheel 216, a frame member (not shown), a seat 218 and a fuel tank 230. In an embodiment, the seat 218 includes a rider seat 218a and a pillion seat 218b. The frame member includes a head pipe (not shown), a main tube (not shown), a down tube (not shown), and a seat rail (not shown). The head pipe supports a steering shaft (not shown) and a fork assembly 220 attached to the steering shaft through a lower bracket (not shown). The fork assembly 220 supports the front wheel 214. In an embodiment, the fork assembly 220 is a telescopic suspension unit, configured to cushion the front side of the vehicle 200 during travelling and thereby ease handling of the vehicle 200. In the present embodiment, the fork assembly 220 is a front fork of the vehicle 200.
[018] A handlebar 222 is fixed to upper bracket (not shown) and can rotate about the steering shaft for turning the vehicle 200. A headlight 224, a visor guard 226 and instrument cluster 228 are arranged on an upper portion of the head pipe. The frame member comprises the down tube that may be positioned in front of the engine 202 and extends slantingly downward from head pipe. The main tube of the frame member is located above the engine 202 and extends rearward from head pipe.
[019] The fuel tank 230 is mounted on the main tube. Seat rails may be joined to the main tube and extends rearward to support the seat 218. A rear swing arm (not shown) is connected to the frame member to swing vertically, and the rear wheel 216 is connected to rear end of the rear swing arm. Generally, the rear swing arm is supported through two rear shock absorbers (not shown) on either side of the vehicle 200 or through a mono rear suspension (not shown). A taillight unit (not shown) is disposed at the end of the vehicle 200 and at the rear of the seat 218 or the pillion seat 218b. A grab rail 232 is also provided to the seat rails. The rear wheel 216 is arranged below the seat 218 rotates by the motive force of the engine 202 transmitted through a chain drive (not shown).
[020] Further, a rear fender 234 is disposed above the rear wheel 216 and a front fender 238 is provided above the front wheel 214. An exhaust pipe 236 of the vehicle 200 extends vertically downward from the engine 202 and then extends below the engine 202, longitudinally along length of the vehicle 200 before terminating in a muffler 240. The muffler 240 is typically disposed adjoining the rear wheel 216.
[021] Referring to Figures 2-4 in conjunction with Figure 1, the valvetrain assembly 100 in accordance with an embodiment of the present invention is depicted. The valvetrain assembly 100 is adapted to ensure minimal number of parts, thereby reducing the friction losses that is generally associated with larger moving parts. Also, the valvetrain assembly 100 is capable of working or operating with variable or flexible fuel as well, thereby making the engine 202 modular.
[022] The valvetrain assembly 100 comprises at least one valve motor 102 (hereinafter referred to as valve motor 102) disposed in the cylinder head 204. The valve motor 102 is coupled to at least one cam lobe 104 (hereinafter referred to as cam lobe 104). In an embodiment, the valve motor 102 is coupled to the cam lobe 104 via a motor shaft 102a (shown in Figure 4). As such, the cam lobe 104 is driven by the valve motor 102 as per requirement. In an embodiment, the valve motor 102 may be a Direct Current (DC) motor or an Alternating Current (AC) motor as per requirement. Further, the valvetrain assembly 100 comprises one or more valve members 106 (hereinafter referred to as valve member 106) disposed in the cylinder head 204. Particularly, each of the valve member 106 is disposed in a valve seat 206 (for e.g. as shown in Figure 7) of the cylinder head 204. The valve member 106 is engaged to the cam lobe 104, so that actuation of the cam lobe 104 enables reciprocatory movement of the valve member 106 between an open position (not shown) and a closed position (closed position). The reciprocatory movement of the valve member 106 takes place about the valve seat 206.
[023] In an embodiment, the valve member 106 is an engine valve such as a poppet valve. The poppet valve comprises a head 110, a stem 106a (as shown in Figure 3) and a valve face 106b (as shown in Figure 3). The stem 106a is inserted into an opening (not shown) provided in the valve seat 206, and thus the valve member 106 moves within the opening in the valve seat 206. During reciprocatory movement of the valve member 106, the valve face 106b engages with the valve seat 206 for closing the valve member 106 and moves away from the valve seat 206 for opening the valve member 106.
[024] The valvetrain assembly 100 further comprises a rocker fork assembly 108 pivotally supported on the cylinder head 204. In an embodiment, the rocker fork assembly 108 comprises an opening 122 which engages with a support shaft extending in the cylinder head 204. As such, the support shaft enables pivotal mounting of the rocker fork assembly 108 on the cylinder head 204. The rocker fork assembly 108 is also pivotally connected to the valve member 106 and is engaged with the cam lobe 104 (as shown in Figure 6). Due to the engagement of the rocker arm assembly 108 with the cam lobe 104 and the valve member 106, the rocker arm assembly 108 is adapted to transfer actuation of the cam lobe 104 to the valve member 106, thereby enabling reciprocatory movement of the valve member 106 about the valve seat 206. Thus, based on the drive received by the cam lobe 104 from the valve motor 102, the valve member 106 is operated about the valve seat 206.
[025] Referring to Figures 5 and 6, the rocker fork assembly 108 comprises a body member 112 pivotally mounted on the cylinder head 204. The body member 112 comprises the opening 122 for enabling engagement with the support shaft, thereby pivotally mounting the body member 112 on the cylinder head 204. A top arm 114 extends forwardly from the body member 112. The construction of the top arm 114 is selected such that, a surface contact is established with the cam lobe 104, when the body member 112 engages with the cam lobe 104. In an embodiment, the top arm 114 is defined with a tapered structure for ensuring a surface contact with the cam lobe 104, when the body member 112 engages with at least a portion of the cam lobe 104.
[026] Further, the rocker arm assembly 108 comprises a bottom arm 116 that extends forwardly from the body member 112 and is spaced apart from the top arm 114. In an embodiment, the top arm 114 extends at one end of the body member 112, while the bottom arm 116 extends at an opposite end of the body member 112. Thus, a gap exists between the top arm 114 and the bottom arm 116. The gap between the top arm 114 and the bottom arm 116 is selected based on profile or structure of the cam lobe 104 and also based on the contact requirement with the cam lobe 104. The construction of the bottom arm 116 is selected such that, a surface contact is established with the cam lobe 104, when the body member 112 engages with the cam lobe 104. In an embodiment, the bottom arm 116 is defined with a tapered structure for ensuring a surface contact with at least a portion of the cam lobe 104, when the body member 112 engages with the cam lobe 104.
[027] The rocker arm assembly 108 also comprises a top leg 118 that extends rearwardly from the body member 112. The top leg 118 engages with an upper portion of the head 110 of the valve member 106. A bottom leg 120 also extends rearwardly from the body member 112 and engages with a lower portion 110b of the head 110 of the valve member 106. The engagement of the top leg 118 and the bottom leg 120 with the head 110 of the valve member 104, and the top arm 114 and the bottom arm 116 with the cam lobe 104 ensures that movement of the cam lobe 104 is transferred to the valve member 104 through the rocker arm assembly 108.
[028] In an embodiment, the length of the top arm 114 and the bottom arm 116 depends on the profile of the cam lobe 104, to ensure sufficient contact of the top arm 114 and the bottom arm 116 with at least a portion of the cam lobe 104. In the present embodiment, the length of the top arm 114 is larger than the bottom arm 116 (for e.g. as shown in Figure 6). In another embodiment, the top arm 114 and the bottom arm 116 extend from the body member 112 such that, a fork-like structure or profile is defined.
[029] In an embodiment, the cam lobe 104 comprises a top portion 104a and a bottom portion 104b. The top portion 104a and the bottom portion 104b of the cam lobe 104 are adapted to selectively contact the top arm 114 and the bottom arm 116 during rotation of the cam lobe 104. Such a selective engagement of the cam lobe 104 with the top arm 114 and the bottom arm 116 oscillates the rocker arm assembly 108 about the opening 122. The oscillatory movement of the rocker arm assembly 108 is transferred to the valve member 106, for reciprocatory movement of the valve member 106.
[030] Referring to Figure 7 in conjunction with Figures 2-6, a top view of the cylinder head 204 is depicted in accordance with an embodiment of the present invention. As illustrated, the cylinder head 204 is provided with valve seat 206 for receiving the valve member 106. In an embodiment, four valve seats 206 are provided, wherein two of the valve seats 206 are provided in an intake side 212a and other two valve seats 206 are provided in an exhaust side 212b of the cylinder 204. As such, the valvetrain assembly 100 provided in the intake side 212a and the exhaust side 212b correspond to an intake valvetrain assembly (not shown) and an exhaust valvetrain assembly (not shown) respectively.
[031] In an embodiment, a separate valve motor 102 is provided for the intake side 212a and the exhaust side 212b. In another embodiment, the valve motor 102 for the intake side 212a and the exhaust side 212b are enclosed within the cylinder head 204. In an embodiment, one valve motor 102 and one or more cam lobes 104 may be provided for controlling operation of the one or more valve members 106 provided on the intake side 212a. Similarly, one valve motor 102 and one or more cam lobes 104 may be provided for controlling operation of the one or more valve members 106 provided on the exhaust side 212b.
[032] In the present embodiment, the engine 202 is a drive unit of the vehicle 200. In another embodiment, the engine 202 may be any power generating machine as per design feasibility and requirement.
[033] Referring to Figure 8 in conjunction with Figures 2-7, each of the at least one valve motor 102 is communicably coupled to an Electronic Control Unit (ECU) 208. In an embodiment, the ECU 208 may be provided in the vehicle 200.In another embodiment, the ECU 208 may be provided in an instrument cluster 228 of the vehicle 200. The ECU 208 is adapted to control operation of the valve motor 102 and thus control actuation of the valvetrain assembly 100. In an embodiment, the ECU 208 is communicably coupled to a crank position sensor 210 for determining position of a crankshaft (not shown) of the engine 202. As such, based on position of the crankshaft, the ECU 208 is adapted to control operation of the valve motor 102 and thus control operation of the valve member 106. In an embodiment, the ECU 208 also checks an engine kill switch 242 prior to checking the position of the crankshaft via the crank position sensor 210. In an embodiment, the ECU 208 comprises a memory unit (not shown) that comprises data pertaining to valve timing of the engine 202. In an embodiment, the valve timing data pertains to position of the valve members 106 that is to be maintaining during operation of the engine 202, based on position of the crankshaft.
[034] In an operation embodiment, the ECU 208 firstly monitors engine ON condition based on the position of the engine kill switch 242. When the engine is in ON condition, the ECU 208 determines the position of the crankshaft. Based on the position of the crankshaft, the ECU 208 determines the position of the one or more valve members 106. In other words, based on the position of the crankshaft, the ECU 208 determines the position of the valve members 106 to be maintained on the intake side 212a and the exhaust 212b. Accordingly, the ECU 208 controls rotation of the valve motor 102 for ensuring position of the valve members 106 in accordance with the position of the crankshaft. The rotation of the valve motor 102 oscillates the rocker fork assembly 108. The oscillatory movement is transferred to the head 110 of the valve member 106, for reciprocatory movement of valve member 106 about the valve seat 206.
[035] The claimed invention as disclosed above is not routine, conventional or well understood in the art, as the claimed aspects enable the following solutions to the existing problems in conventional technologies. Specifically, the claimed aspects of the valve motor 102, the cam lobe 104 coupled to the valve motor 102 and the rocker arm assembly 108 coupled to the cam lobe 104 and the valve member 106 reduces the number of components in the valvetrain assembly 100, thereby minimizing the friction relates losses in the valvetrain assembly 100. Consequently, reducing weight of the engine 202 and associated vibration, while improving performance of the engine 202. Further, durability of the valvetrain assembly 100 and thus the engine 202 is improved, due to lesser number of parts. Additionally, as the ECU 208 controls operation of the valve motor 102, the aspects pertaining to a Variable Valvetrain System (VVT) or Variable Valve Actuation system (VVA) can be achieved without the need for complex arrangement of components, thereby making the engine construction simple and modular. Further, such modular type engine is capable of operating on more than one type of fuel or a flexible fuel, without the need for changing the layout of the engine, thereby increasing the cost efficiency of the engine. Moreover, due to lesser number of components and weight of the engine 202, the mileage derived from the engine 202 is improved, while reducing emissions emitted from the engine. Additionally, due to lesser number of components in the valvetrain assembly 100, the durability of the valvetrain assembly 100 is improved, while also improving ease of serviceability, due to ease of identification of problems in the valvetrain assembly 100. Furthermore, lesser number of parts eases manufacturability of the valvetrain assembly 100.
Reference numerals
100 Valvetrain assembly
102 Valve motor
104 Cam lobe
104a Top portion of cam lobe
104b Bottom portion of cam lobe
106 Valve members
106a Stem of valve member
106b Valve face
108 Rocker fork assembly
110 Head of valve member
110a Upper portion of head
110b Lower portion of head
112 Body member
114 Top arm
116 Bottom arm
118 Tog leg
120 Bottom leg
122 Opening
200 Vehicle
202 Engine
204 Cylinder head
206 Valve seat
208 Electronic Control Unit
210 Crank position sensor
212 Cylinder
212a Intake side of cylinder
212b Exhaust side of cylinder
214 Front wheel
216 Rear wheel
218 Seat
218a Rider seat
218b Pillion seat
220 Fork assembly
222 Handlebar
224 Headlight
226 Visor guard
228 Instrument cluster
230 Fuel tank
232 Grab rail
234 Rear fender
236 Exhaust pipe
238 Front fender
240 Muffler
242 Engine kill switch , Claims:WE CLAIM:
1. A valvetrain assembly (100) for an engine (202) , the valvetrain assembly (100) comprising:
at least one valve motor (102) disposed in a cylinder head (204) of the engine (202);
at least one cam lobe (104) coupled to the at least one valve motor (102), each of the at least one cam lobe (104) being driven by the at least one valve motor (102);
one or more valve members (106) disposed in the cylinder head (204), wherein each of the one or more valve members (106) are disposed within a valve seat (206) provided in the cylinder head (204); and
a rocker fork assembly (108) pivotally supported on the cylinder head (204) and pivotally connected to the one or more valve members (106), the rocker fork assembly (108) adapted to engage with the at least one cam lobe (104), wherein the rocker fork assembly (108) is adapted to enable reciprocatory movement of the one or more valve members (106) about the valve seat (206) based on the drive received by the at least one cam lobe (104) from the at least one valve motor (102).

2. The valvetrain assembly (100) as claimed in claim 1, wherein each of the at least one valve motor (102) is communicably coupled to an Electronic Control Unit (ECU) (208) of the vehicle (200).

3. The valvetrain assembly (100) as claimed in claim 2, wherein the ECU (208) is communicably coupled to a crank position sensor (210) for determining position of a crankshaft of the engine (202), the ECU (208) being configured to actuate each of the at least one valve motor (102) for correspondingly operating the one or more valve members (106), based on position of the crankshaft.

4. The valvetrain assembly (100) as claimed in claim 1, wherein the rocker fork assembly (108) comprises:
a body member (112);
a top arm (114) extending forwardly from the body member (112);
a bottom arm (116) extending forwardly from the body member (112);
a top leg (118) extending rearwardly from the body member (112) and adapted to engage with an upper portion (110a) of a head (110) of the one or more valve members (106); and
a bottom leg (120) extending rearwardly from the body member (112) and adapted to engage with a lower portion (110b) of the head (110) of the one or more valve members (106).

5. The valvetrain assembly (100) as claimed in claim 4, wherein the body member (112) is defined with an opening (122) for receiving a support shaft provided on the cylinder head (204), the support shaft being adapted to pivotally support the body member (112) on the cylinder head (204).

6. The valvetrain assembly (100) as claimed in claim 4, wherein the top arm (114) and the bottom arm (116) of the body member (112) are provided with a tapered structure for facilitating surface contact with the at least one cam lobe (104), during rotation of the at least one cam lobe (104).

7. The valvetrain assembly (100) as claimed in claim 4, wherein the at least one cam lobe (104) comprises a top portion (104a) and a bottom portion (104b) adapted to selectively engage with the top arm (114) and the bottom arm (116) based on drive received from the at least one valve motor (102), the selective engagement between the top arm (114) and the bottom arm (116) enables oscillatory movement of the rocker fork assembly (108) about an opening (122) to enable reciprocatory movement of the one or more valves (106) about the valve seat (206).

8. An engine (202) for a vehicle (200), the engine (202) comprising:
a cylinder (212) mounted on a frame of the vehicle (200) and having a cylinder head (204); and
a valvetrain assembly (100) disposed in the cylinder head (204), the valvetrain assembly (100) comprising:
at least one valve motor (102);
at least one cam lobe (104) coupled to the at least one valve motor (102), each of the at least one cam lobe (104) being driven by the at least one valve motor (102);
one or more valve members (106) disposed in the cylinder head (204), wherein each of the one or more valve members (106) are disposed within a valve seat (206) provided in the cylinder head (204); and
a rocker fork assembly (108) pivotally supported on the cylinder head (204) and pivotally connected to the one or more valve members (106), the rocker fork assembly (108) adapted to engage with the at least one cam lobe (104), wherein the rocker fork assembly (108) is adapted to enable reciprocatory movement of the one or more valve members (106) about the valve seat (206) based on the drive received by the at least one cam lobe (104) from the at least one valve motor (102).

9. The engine (202) as claimed in claim 8, wherein each of the at least one valve motor (102) is communicably coupled to an ECU (208) of the vehicle (200).

10. The engine (202) as claimed in claim 9, wherein the ECU (208) is communicably coupled to a crank position sensor (210) for determining position of a crankshaft of the engine (202), the ECU (208) being configured to actuate each of the at least one valve motor (102) for correspondingly operating the one or more valve members (106), based on position of the crankshaft.

11. The engine (202) as claimed in claim 8, wherein the rocker fork assembly (108) comprises:
a body member (112);

a top arm (114) extending forwardly from the body member (112);
a bottom arm (116) extending forwardly from the body member (112);
a top leg (118) extending rearwardly from the body member (112) and adapted to engage with an upper portion (110a) of a head (110) of the one or more valve members (106); and
a bottom leg (120) extending rearwardly from the body member (112) and adapted to engage with a lower portion (110b) of the head (110) of the one or more valve members (106).

12. The engine (202) as claimed in claim 11, wherein the body member (112) is defined with an opening (122) for receiving a support shaft provided on the cylinder head (204), the support shaft being adapted to pivotally support the body member (112) on the cylinder head (204).

13. The engine (202) as claimed in claim 11, wherein the top arm (114) and the bottom arm (116) of the body member (112) are provided with a tapered structure for facilitating surface contact with the at least one cam lobe (104), during rotation of the at least one cam lobe (104).

14. The engine (202) as claimed in claim 11, wherein the at least one cam lobe (104) comprises a top portion (104a) and a bottom portion (104b) adapted to selectively engage with the top arm (114) and the bottom arm (116) based on drive received from the at least one valve motor (102), the selective engagement between the top arm (114) and the bottom arm (116) enables oscillatory movement of the rocker fork assembly (108) about an opening (122) to enable reciprocatory movement of the one or more valves (106) about the valve seat (206).

Dated this 04th day of August 2022
TVS MOTOR COMPANY LIMITED
By their Agent & Attorney

(Nikhil Ranjan)
of Khaitan & Co
Reg No IN/PA-1471