Variable valve propulsion device

Abstract

The invention relates to a variable valve pushing device. The variable valve pushing device is installed on a power unit of a vehicle. The power unit is connected to a frame unit of the vehicle, the power unit is at least provided with a cylinder part and a transmission part, the cylinder part is connected with an air inlet pipe, and the variable valve pushing device is installed on the cylinder part; the variable valve pushing device is provided with an actuator and a pushing mechanism capable of being driven by the actuator. The actuator is provided with a body part and an actuating rod capable of freely extending out of or retracting into the body part; the actuator is installed on the cylinder part in the vertical direction of the vehicle body, and a cam shaft is arranged in the cylinder part. From the front view of the vehicle body, the top end edge of the actuator is located between the lower portion of the upper edge of the air inlet pipe and the upper portion of the axis of the cam shaft in the left-right direction of the vehicle body. Therefore, when the vehicle is used as the air inlet valve, the high air inlet lift and low air inlet lift switching action can be more accurate and smoother, the space above the cylinder part can be utilized well, and the interference between the variable valve pushing device and other components can be avoided.

Description

Technical Field

[0001] The present invention relates to a variable valve driving device, and more particularly to a variable valve driving device that can make the switching action of the intake valve of the vehicle between high intake lift and low intake lift more precise and smooth. Background Art

[0002] For the variable valve lift mechanism of an internal combustion engine, the applicant applied for the patent case of "Engine Valve Driving Member Structure" with the application number I379941; in order to make the variable valve lift mechanism of the internal combustion engine more precise and convenient, the applicant further created the variable valve lift mechanism of the internal combustion engine. Summary of the Invention

[0003]

Problems to be Solved by the Invention

[0004] The main object of the present invention is to provide a variable valve driving device to improve the precision and smoothness of the switching action of the intake valve of the vehicle between high intake lift and low intake lift.

[0005]

Technical Means for Solving the Problems

[0006] To this end, some technical means of the present invention are to provide a variable valve driving device, which is installed on the power unit of the vehicle; the power unit is connected to the frame unit of the vehicle, the power unit at least has a cylinder part and a transmission part, the cylinder part is connected with an intake pipe, and the variable valve driving device is installed on the cylinder part; the variable valve driving device has an actuator and a driving mechanism that can be driven by the actuator; the actuator has a body part and an actuating rod that can freely extend or retract into the body part; the actuator is installed on the cylinder part in the up and down direction of the vehicle body, and a camshaft is arranged in the cylinder part; viewed from the front of the vehicle body, the top edge of the actuator is located between the lower part of the upper edge of the intake pipe and the upper part of the axis of the camshaft in the left and right direction of the vehicle body.

[0007] To this end, some technical means of the present invention are to provide a variable valve driving device, the frame unit has a cross pipe; the body part of the actuator is located between the lower part of the cross pipe and the upper part of the cylinder part.

[0008] To this end, some technical means of the present invention are to provide a variable valve driving device, viewed from the front of the vehicle body, the body part of the actuator is located within the width range of the cylinder part in the left and right direction of the vehicle body, and the actuating rod is located above the axis of the camshaft in the left and right direction of the vehicle body.

[0009] Therefore, some technical means of the present invention are to provide a variable valve actuating device. The frame unit has a side frame portion, and the side frame portion has a rising section; a camshaft is provided in the cylinder portion; when viewed from the side of the vehicle body, one end of the body portion of the actuator away from the actuating rod is located in front of the rising section and above the cylinder portion.

[0010] Therefore, some technical means of the present invention are to provide a variable valve actuating device. The vehicle has a footrest portion; when viewed from the side of the vehicle body, the top edge of the body portion of the actuator is located above the rear upper part of the footrest portion in the rearward direction of the vehicle body and above the cylinder portion.

[0011] Therefore, some technical means of the present invention are to provide a variable valve actuating device. The vehicle has a vehicle body cover unit, and an air inlet hole is provided in a part of the vehicle body cover unit covering the front of the actuator; when viewed from the side of the vehicle body, the body portion of the actuator is located behind the air inlet hole.

[0012] Therefore, some technical means of the present invention are to provide a variable valve actuating device. When viewed from above the vehicle body, the actuator is located within the width range of the cylinder portion in the left - right direction of the vehicle body and in front of the cross - tube.

[0013] Therefore, some technical means of the present invention are to provide a variable valve actuating device. The cylinder portion has a piston actuating mechanism that can make the intake valve have a high intake lift and a low intake lift; the actuating rod of the actuator has an actuating tooth portion; the actuating mechanism has a pivoting portion, a passive tooth portion provided on the outer periphery of the pivoting portion, and a pushing portion; the actuating mechanism is pivotally provided on the cylinder portion by a pivot of the pivoting portion; the passive tooth portion meshes with the actuating tooth portion of the actuating rod; the actuator can drive the actuating mechanism to rotate, and the actuating mechanism can make the pushing portion push the piston actuating mechanism.

[0014] Therefore, some technical means of the present invention are to provide a variable valve actuating device, and the pushing portion is an eccentric cam.

[0015] Therefore, some technical means of the present invention are to provide a variable valve actuating device. The actuating mechanism rotates and actuates along a rotation axis extending in the front - rear direction of the vehicle body and is pivotally provided on the cylinder portion; the actuator and the actuating mechanism are arranged in a substantially perpendicular manner.

[0016]

Effects of the Invention

[0017] The present invention can achieve the following effects through some technical means: This can make the switching action of the intake valve of the vehicle between high intake lift and low intake lift more precise and smooth, and can make good use of the space above the cylinder portion and avoid interference between the variable valve actuating device and other components.

[0018] The present invention can achieve the following effects through some technical means: by doing so, the space above the cylinder part can be effectively utilized, and interference between the variable valve actuating device and other components can be avoided.

[0019] The present invention can achieve the following effects through some technical means: by doing so, interference between the variable valve actuating device and other components can be avoided.

[0020] The present invention can achieve the following effects through some technical means: by doing so, the switching operation between high intake lift and low intake lift of the intake valve of the vehicle can be made more precise and smooth.

[0021] The present invention can achieve the following effects through some technical means: by doing so, the space above the cylinder part can be effectively utilized, interference between the variable valve actuating device and other components can be avoided, and the maintenance work of the variable valve actuating device can be facilitated.

[0022] The present invention can achieve the following effects through some technical means: by doing so, the heat dissipation effect of the actuator of the variable valve actuating device can be improved.

[0023] The present invention can achieve the following effects through some technical means: by doing so, the maintenance work of the variable valve actuating device can be facilitated.

[0024] The present invention can achieve the following effects through some technical means: by doing so, the precision and smoothness of the switching operation between high intake lift and low intake lift of the intake valve of the vehicle can be improved.

[0025] The present invention can achieve the following effects through some technical means: by doing so, the actuating effect of the variable valve actuating device can be ensured.

[0026] The present invention can achieve the following effects through some technical means: by doing so, interference between other components in the left - right direction of the vehicle body and the variable valve actuating device can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a side view schematic diagram of the cross - type vehicle of the present invention.

[0028] Figure 2 It is a top view of the rear half of the cross - type vehicle of the present invention.

[0029] Figure 3 It is a front view of the rear half of the cross - type vehicle of the present invention.

[0030] Figure 4 It is a three - dimensional view after the variable valve actuating device of the present invention is installed.

[0031] Figure 5 It is a schematic diagram of the installation of the variable valve actuating device and the cylinder part of the present invention.

[0032] Figure 6 It is a schematic diagram of another perspective of the installation of the variable valve driving device of the present invention on the cylinder part.

[0033] Figure 7 、 8 It is a sectional view action diagram of the variable valve driving device and the piston actuating mechanism of the present invention.

[0034] List of reference numerals

[0035] 1: Motorcycle

[0036] 2: Frame unit

[0037] 21: Head pipe part 22: Steering mechanism

[0038] 23: Down tube part

[0039] 24: Footrest tube part

[0040] 241: Footrest cross tube

[0041] 25: Side frame part

[0042] 251: Rising section 252: Extension section

[0043] 253: Auxiliary tube 254: Extension piece

[0044] 26: Cross tube

[0045] 3: Seat

[0046] 4: Power unit

[0047] 41: Cylinder part

[0048] 411: Cylinder body 412: Cylinder head

[0049] 413: Camshaft seat

[0050] 414: Camshaft 414a: Axis

[0051] 415: Intake valve pusher

[0052] 4151: First pusher

[0053] 4152: Second pusher

[0054] 416: Exhaust valve pusher

[0055] 417: Combustion chamber

[0056] 42: Transmission part 421: Power output shaft

[0057] 422: Power wheel 423: Transmission belt

[0058] 424: Driving wheel

[0059] 43: Piston actuating mechanism

[0060] 431: First piston 432: Second piston

[0061] 433: Elastic element

[0062] 44: Crankcase

[0063] 5: Variable valve actuating device

[0064] 51: Actuator

[0065] 511: Body part 511a: Top edge

[0066] 512: Actuating rod

[0067] 513: Actuating tooth part

[0068] 52: Actuating mechanism

[0069] 521: Pivoting part 5211: Pivot

[0070] 522: Driven tooth part 523: Actuating part

[0071] 6: Body cover unit

[0072] 61: Front hood 62: Front panel

[0073] 63: Knee shield

[0074] 64: Footrest

[0075] 641: Bottom cover

[0076] 65: Side body cover

[0077] 66: Central body cover 661: Air inlet hole

[0078] 7: Air filter

[0079] 71: Intake pipe 71a: Upper edge

[0080] A: Front fork unit

[0081] B: Footrest part

[0082] C: Storage box

[0083] T: Fuel tank

[0084] L: Rear swing arm L1: Rear wheel axle

[0085] FW: Front wheel RW: Rear wheel

[0086] V: Intake valve V1: Exhaust valve. Detailed implementation

[0087] To better understand the structure and achievable effects of the present invention, the following is described in conjunction with the accompanying drawings.

[0088] First, please refer to Figure 1 、 4 As shown, the variable valve actuating device of the present invention is used in an internal combustion engine powered vehicle. Hereinafter, the vehicle of the present invention is exemplified by a scooter 1; the scooter (vehicle) 1 at least includes a frame unit 2, a seat 3 provided on the frame unit 2, a power unit 4, the variable valve actuating device 5 is installed on the power unit 4, and a body cover unit 6 covering the outer periphery of the frame unit 2.

[0089] As Figure 1 、 2 、3 shown, in the following description, the left and right sides of the vehicle body are defined as follows: after the driver sits on the scooter 1, the left hand side of the driver is the left side, and the right hand side of the driver is the right side. First, it should be stated. A head tube portion 21 is pivotally provided in front of the frame unit 2. A steering mechanism 22 is connected above the head tube portion 21. The head tube portion 21 is connected to a down tube portion 23 towards the rear of the vehicle body. A pair of left and right pedal tube portions 24 that extend towards the rear of the vehicle body and are slightly horizontal are connected below the down tube portion 23. A pedal cross tube 241 is connected below between the pair of left and right pedal tube portions 24; the pedal tube portions 24 extend towards the rear of the vehicle to form a pair of left and right side frame portions 25. The side frame portions 25 have an ascending section 251 adjacent to the pedal tube portions 24 and an extending section 252 located at the rear section of the vehicle body. A pair of left and right auxiliary tubes 253 are provided between the ascending section 251 and the extending section 252 of the side frame portions 25, and a pair of left and right extending members 254 extend towards the rear of the vehicle body at a position adjacent to the pedal tube portions 24 on the ascending section 251; a cross tube 26 connecting the pair of left and right ascending sections 251 is provided on the ascending section 251; a front fork unit A formed by a front shock absorber is pivotally provided below the head tube portion 21, and a front wheel FW is pivotally provided at the lower end of the front fork unit A.

[0090] As Figure 1 、 2 、3 shown, a pedal 64 of the body cover unit 6 that is slightly flat is provided on the slightly horizontal pedal tube portions 24 of the frame unit 2. By means of the pedal 64, a flat footrest portion B for the driver to rest his feet is formed; viewed from the up and down direction of the vehicle body, inside the internal space defined between the pair of left and right slightly horizontal pedal tube portions 24, a fuel tank T for storing fuel for the combustion of the power unit 4 is installed. The power unit 4 is connected to the frame unit 2 and is arranged further towards the rear of the vehicle body than the fuel tank T.

[0091] As Figure 1 、2 As shown in FIGS. 2 and 3, a seat 3 for the driver to sit on is provided above the extension section 252 of the side frame part 25, and a storage box C is provided on the extension section 252 of the side frame part 25 and below the seat 3; the power unit 4 is locked on the auxiliary pipe 253 and the extension part 254 of the side frame part 25, and the power unit 4 is fixed on the frame unit 2 in a non-swinging manner; the power unit 4 has a cylinder part 41 and a transmission part 42, the cylinder part 41 extends forward toward the vehicle body in a slightly inclined manner and partially extends out of the rising section 251 of the side frame part 25, that is, the part where the cylinder part 41 extends forward toward the vehicle body extends more forward than the rising section 251 of the side frame part 25; the transmission part 42 is located at the rear right side of the cylinder part 41, and a power output shaft 421 extends in the left-right direction of the vehicle body at the rear end of the transmission part 42, and a power wheel 422 is provided on one side of the power output shaft 421 (implemented with the left side of the vehicle body in the figure), and the power wheel 422 is connected to a driving wheel 424 on the rear wheel RW by a transmission belt 423; a rear swing arm L is pivotally provided at the power output shaft 421 of the transmission part 42, the front end of the rear swing arm L is pivotally provided on the transmission part 42, and the rear end of the rear swing arm L is provided with a rear wheel shaft L1 for the rear wheel RW to be pivotally provided, whereby the power unit 4 rotates the rear wheel RW through the power output shaft 421, the power wheel 422, the transmission belt 423, and the driving wheel 424 of the transmission part 42.

[0092] As Figure 1 shown in 2 FIGS. 2 and 3, the vehicle body cover unit 6 has a front cover 61 covering the steering mechanism 22, a front panel 62 provided below the front cover 61 and covering the front end of the vehicle body, and a knee shield 63 provided behind the front panel 62, a footrest 64 provided below the steering mechanism 22 and between the seat 3, a bottom cover 641 is provided below the footrest 64, the motorcycle 1 is provided with side body covers 65 on both sides of the side frame part 25 below the seat 3, and a central body cover 66 is provided below the front end of the seat 3; the central body cover 66 can be formed by the side body covers 65 covering toward the center of the vehicle body or be an independent cover member; at least one air inlet hole 661 is provided on the vehicle body cover unit 6, the air inlet hole 661 can be formed by one or both of the left and right side body covers 65, or be formed by the central body cover 66 or other maintenance covers between the left and right side body covers 65. In the implementation, the air inlet hole 661 of the present invention is provided on the central body cover 66. Further, a plurality of the air inlet holes 661 can be provided on the central body cover 66, and only one air inlet hole 661 is drawn in the figure for example.

[0093] As Figure 1 shown in 2As shown in Figures 3, 4, 5, 6, and 7, the cylinder section 41 of the power unit 4 has a cylinder block 411 and a cylinder head 412 assembled on the cylinder block 411. The cylinder block 411 is disposed above a crankcase 44, and the transmission section 42 is connected to one side of the crankcase 44. Fresh air required for the combustion explosion of the power unit 4 is supplied by an air filter 7. After filtering and purifying the external space, the air filter 7 inputs the air into the cylinder section 41 through an intake pipe 71 connected to the air filter 7 and the cylinder section 41 of the power unit 4, so that it can be mixed with the fuel input from the fuel tank T and then undergo combustion explosion in the cylinder section 41, thereby enabling the power unit 4 to generate power. A camshaft seat 413 is provided on the cylinder head 412, and a camshaft 414 driven by a timing chain (not shown in the figure) is provided on the camshaft seat 413. An intake valve V is provided on the intake side of the cylinder head 412, and an exhaust valve V1 is provided on the exhaust side. The intake valve V can be pushed by an intake valve actuator 415, and the exhaust valve V1 can be pushed by an exhaust valve actuator 416. A first intake cam (high lift cam) (not shown in the figure), a second intake cam (low lift cam) (not shown in the figure), and an exhaust cam (not shown in the figure) are respectively provided on the camshaft 414. The intake valve actuator 415 has a first actuator 4151 and a second actuator 4152. The push roller (not shown in the figure) of the first actuator 4151 is in contact with the first intake cam of the camshaft 414, and the push roller (not shown in the figure) of the second actuator 4152 is in contact with the second intake cam of the camshaft 414. It should be further mentioned that in this creation, the camshaft 414 is implemented with a single camshaft, and the camshaft 414 is disposed between the intake (exhaust) valve actuator 415 (416) and the combustion chamber 417.

[0094] As shown in Figure 3 、 4 Figures 5, 6, and 7, a piston actuating mechanism 43 is provided between the first actuator 4151 and the second actuator 4152. The piston actuating mechanism 43 is configured to be away from the combustion chamber 417. The piston actuating mechanism 43 has a first piston 431, a second piston 432, and an elastic element 433. The first actuator 4151 and the second actuator 4152 are actuated by the first piston 431, the second piston 432, and the elastic element 433 of the piston actuating mechanism 43 to make the first actuator 4151 and the second actuator 4152 linked or unlinked (the actuation method of this part is the same as the existing one, so it will not be elaborated here). Thereby, the cylinder section 41 of the power unit 4 can make the intake valve have different lift openings according to the driving state change by the vehicle control center (ECU), so that the cylinder section 41 of the power unit 4 has the effect of different intake lifts.

[0095] As shown in Figure 1 、 2As shown in Figures 3, 4, 5, 6, 7, and 8, a variable valve actuating device 5 for pushing the piston actuating mechanism 43 is installed on the cylinder head 412 of the cylinder part 41 of the power unit 4. The variable valve actuating device 5 is electrically connected to the vehicle control center (ECU) of the motorcycle 1. Thus, the vehicle control center (ECU) can make the variable valve actuating device 5 act or not act according to the driving conditions of the motorcycle 1. The variable valve actuating device 5 has an actuator 51 and a pushing mechanism 52 that can drive the actuator 51. The actuator 51 of the present invention can be implemented by an electromagnetic solenoid valve, a hydraulic or pneumatic power valve body. The following description and drawings take the solenoid valve as an example for illustration. The actuator 51 is installed on the cylinder part 41 along the up-and-down direction of the vehicle body (U in the figure is the upper direction of the vehicle body, D is the lower direction of the vehicle body, F is the front of the vehicle body, and R is the rear of the vehicle body). Further, the actuator 51 is installed on the cylinder head 412 of the cylinder part 41. The actuator 51 has a body part 511 and an actuating rod 512 that can freely extend or retract into the body part 511 and extends toward the camshaft 414. The actuating rod 512 has an actuating tooth part 513 formed by concave and convex parts. The pushing mechanism 52 rotates and acts along a rotation axis extending in the front-rear direction of the vehicle body and is pivotally installed on the cylinder part 41. Further, the actuator 51 is installed on the cylinder head 412 of the cylinder part 41. It should be mentioned that the actuator 51 and the pushing mechanism 52 are arranged in a substantially perpendicular manner. The pushing mechanism 52 has a pivotal part 521, a passive tooth part 522 provided on the outer periphery of the pivotal part 521, and a pushing part 523. The pushing mechanism 52 is pivotally installed on the cylinder part 41 by a pivot 5211 of the pivotal part 521. Thus, the pushing mechanism 52 is driven by the actuator 51 to rotate with the pivot 5211 as the rotation center. The passive tooth part 522 meshes with the actuating tooth part 513 of the actuating rod 512 of the actuator 51. Thus, when the actuator 51 acts, it can drive the pushing mechanism 52 to rotate. After the pushing mechanism 52 is driven to rotate, the pushing part 523 rotates. When the pushing part 523 rotates, it can push the piston actuating mechanism 43. Thus, the piston actuating mechanism 43 can switch and change the high intake lift and low intake lift of the intake valve actuating part 415. The pushing part 523 of the present invention can be implemented by an eccentric cam. It should be mentioned that the passive tooth part 522 of the pushing mechanism 52 and the actuating tooth part 513 of the actuating rod 512 of the actuator 51 further make the pushing mechanism 52 rotate at an accelerated or decelerated speed with different gear ratios.

[0096] As Figure 1 , 2As shown in Figures 3, 4, 5, 6, 7, and 8, the specific configuration of the variable valve actuating device 5 of the present invention is such that, when viewed from the front of the vehicle body, the top edge 511a of the body portion 511 of the actuator 51 is designed to be located between the lower edge of the intake pipe 71 and above the cylinder portion 41; when viewed from the front of the vehicle body, the body portion 511 of the actuator 51 is located below the cross pipe 26 and above the cylinder portion 41; when viewed from the front of the vehicle body, the body portion 511 of the actuator 51 is within the width range of the cylinder portion 41 in the left-right direction of the vehicle body, and the actuating rod 512 is located above the axis 414a of the camshaft 414 in the left-right direction of the vehicle body; when viewed from the side of the vehicle body (illustrated by the left side of the vehicle body in the figure), the end of the body portion 511 of the actuator 51 away from the actuating rod 512 is located in front of the ascending section 251 of the side frame portion 25 and above the cylinder portion 41; when viewed from the side of the vehicle body, the top edge 511a of the body portion 511 of the actuator 51 is located above the rear upper part of the footrest portion B in the rearward direction of the vehicle body and above the cylinder portion 41; when viewed from the side of the vehicle body, the body portion 511 of the actuator 51 is located behind the central vehicle body cover 66 of the vehicle body cover unit 6 in the rearward direction of the vehicle body. More specifically, the body portion 511 of the actuator 51 is located behind the air inlet hole 661 of the central vehicle body cover 66. Thus, when the motorcycle 1 is in motion, external cold air can enter through the air inlet hole 661 to cool the actuator 51, thereby improving the service effect of the actuator 51; when viewed from above the vehicle body, the actuator 51 is within the width range of the cylinder portion 41 in the left-right direction of the vehicle body and is located in front of the cross pipe 26.

[0097] The variable valve actuating device 5 of the present invention is installed on the power unit 4 of the vehicle 1; the power unit 4 is connected to the frame unit 2 of the vehicle 1. The power unit 4 has at least a cylinder portion 41 and a transmission portion 42. The cylinder portion 41 is connected with an intake pipe 71. The variable valve actuating device 5 is installed on the cylinder portion 41; the variable valve actuating device 5 has an actuator 51 and a pushing mechanism 52 that can be driven by the actuator 51; the actuator 51 has a body portion 511 and an actuating rod 512 that can freely extend or retract into the body portion 511; the actuator 51 is installed on the cylinder portion 41 in the up-down direction of the vehicle body. The cylinder portion 41 has a camshaft 414 inside; when viewed from the front of the vehicle body, the top edge 511a of the actuator 51 is located between the lower edge of the intake pipe 71 and above the axis 414a of the camshaft 414 in the left-right direction of the vehicle body; thereby enabling the vehicle 1 to perform the switching action of the intake valve between high intake lift and low intake lift more precisely and smoothly, and making good use of the space above the cylinder portion 41 and avoiding interference between the variable valve actuating device 5 and other components.

[0098] In summary, with the above-described structure, the present invention can indeed improve the existing drawbacks and achieve the desired objectives and effects, and should already meet the requirements of practicality, novelty, and inventiveness for an invention patent.

Claims

1. A variable valve driving device, characterized in that: The variable valve push device is installed on the power unit of the vehicle; the power unit is connected to the frame unit of the vehicle, the power unit has at least a cylinder part and a transmission part, the cylinder part is connected to the intake pipe, and the variable valve push device is installed on the cylinder part; the variable valve push device has an actuator and a pushing mechanism that can be driven by the actuator; the actuator has a main body and an actuating rod that can be freely extended or retracted into the main body; the actuator is installed on the cylinder part in the up and down direction of the vehicle body, and the cylinder part has a camshaft; viewed from the front of the vehicle body, the top edge of the actuator is located between below the upper edge of the intake pipe and above the axis of the camshaft along the left and right direction of the vehicle body.

2. The variable valve actuator according to claim 1, characterized in that: The frame unit has a cross tube; the body portion of the actuator is located between a lower portion of the cross tube and an upper portion of the cylinder portion.

3. The variable valve actuator according to claim 1, characterized in that: When viewed from the front of the vehicle body, the main body of the actuator is located within the width of the cylinder portion along the left-right direction of the vehicle body, and the actuating rod is located above the axis of the camshaft along the left-right direction of the vehicle body.

4. The variable valve actuator according to claim 1, characterized in that: The frame unit has a side frame portion, and the side frame portion has a rising section; the cylinder portion has a camshaft inside; when viewed from the side of the vehicle body, the end of the main body of the actuator away from the actuating rod is located in front of the rising section and above the cylinder portion.

5. The variable valve actuator according to claim 1, characterized in that: The vehicle has a footrest; when viewed from the side of the vehicle body, the top edge of the main body of the actuator is located above the footrest in the rear direction of the vehicle body and above the cylinder portion.

6. The variable valve actuator according to claim 1, characterized in that: The vehicle has a vehicle body cover unit, and a portion of the vehicle body cover unit covering the front of the actuator is provided with an air inlet hole; when viewed from the side of the vehicle body, the main body of the actuator is located behind the air inlet hole.

7. The variable valve actuator according to claim 2, characterized in that: When viewed from above the vehicle body, the actuator is located within the width of the cylinder portion in the left-right direction of the vehicle body and in front of the cross pipe.

8. The variable valve actuator according to claim 1, characterized in that: The cylinder part has a piston actuating mechanism that can make the intake valve have high intake lift and low intake lift; the actuating rod of the actuator has an actuating tooth portion; the pushing mechanism has a pivot portion, a passive tooth portion arranged on the outer periphery of the pivot portion, and a pushing portion; the pushing mechanism is pivoted on the cylinder part by a pivot of the pivot portion; the passive tooth portion is meshed with the actuating tooth portion of the actuating rod; the actuator can drive the pushing mechanism to rotate, and the pushing mechanism can make the pushing portion push the piston actuating mechanism.

9. The variable valve actuator according to claim 8, characterized in that: The pushing part is an eccentric cam.

10. The variable valve actuator according to claim 1 or 8, characterized in that: The pushing mechanism is pivotally mounted on the cylinder portion and is rotated along a rotation axis extending in the front-rear direction of the vehicle body; the actuator is arranged in a substantially perpendicular manner to the pushing mechanism.

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