Engine and motorcycle adopting same

Abstract

The engine comprises an air cylinder cover, a cam shaft, a timing system and an air cylinder cover, the cam shaft is arranged on the air cylinder cover, and the extending direction of the cam shaft is defined as a first set direction; at least part of the timing system is arranged on the cylinder cover and is in transmission connection with the cam shaft; the air cylinder cover comprises a first cover body part and a second cover body part which are distributed in the first set direction, the cam shaft is arranged on the first cover body part and can rotate relative to the first cover body part in the circumferential direction of the cam shaft, and the second cover body part and the first cover body part are integrally formed. And a timing mounting space for arranging a timing system is formed between the second cover body part and the first cover body part. Through the arrangement, the number of accessories of the cylinder head is reduced, so that the overall weight of an engine is reduced, and the sealing effect between the cylinder head and the cylinder head cover is remarkably improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle engineering technology, and in particular to an engine and a motorcycle using the engine. Background Art

[0002] The engine includes a piston, a crankshaft connecting rod mechanism, an intake and exhaust system, and a timing system. The reciprocating motion of the piston drives the crankshaft connecting rod mechanism to rotate. Since the crankshaft connecting rod mechanism is connected to the intake and exhaust system through the timing system, the engine can achieve continuous intake and exhaust control. In order to reduce fuel consumption and improve the combustion efficiency of the engine, a variable valve timing (VVT) system is now available to improve the working efficiency of the engine by adjusting the overlap time and timing of the engine intake and exhaust system.

[0003] Due to the structural size of the engine equipped with the VVT ​​system, most cylinder heads need to use a side cover fixed to the cylinder head to protect the VVT ​​system. At the same time, there is a cylinder head cover above the VVT ​​system. This results in a triangular sealing area formed at the junction of the cylinder head, cylinder head cover and side cover, which cannot be completely sealed, resulting in oil and air leakage. At the same time, more bolts increase the process time and the weight of the cylinder head. Utility Model Content

[0004] In order to solve the deficiencies of the prior art, the purpose of the present application is to provide an engine and a motorcycle suitable for the engine, wherein the engine has good sealing performance.

[0005] To achieve the above objectives, this application adopts the following technical solutions:

[0006] In the first aspect, the present application provides an engine, which includes a cylinder head, a camshaft, a timing system and a cylinder head cover; the camshaft is arranged on the cylinder head, and the extension direction of the camshaft is defined as a first set direction; at least part of the timing system is arranged on the cylinder head and is transmission-connected to the camshaft; the cylinder head cover is arranged on the cylinder head; a first cover body portion and a second cover body portion are distributed along the first set direction, the second cover body portion is integrally formed with the first cover body portion, and a timing installation space for arranging the timing system is formed between the second cover body portion and the first cover body portion, and the camshaft is rotationally connected to the first cover body portion.

[0007] Furthermore, the engine also includes a cylinder head cover arranged on the cylinder head, the cylinder head cover has a mounting surface mounted to the cylinder head, the first cover body has a first sealing area facing the cylinder head cover, the second cover body has a second sealing area facing the cylinder head cover, the second sealing area and the first sealing area form a continuous cylinder head sealing area, and the cylinder head abuts against the mounting surface of the cylinder head cover through the cylinder head sealing area.

[0008] Furthermore, the camshaft includes an intake camshaft, and the second cover body is provided with a notch opening toward the top of the cylinder head, and when viewed from the first set direction, the notch at least partially overlaps with the intake camshaft.

[0009] Furthermore, the engine also includes a solenoid valve, which is arranged on the second cover body and connected to the timing system; the second cover body is provided with a mounting groove for installing the solenoid valve, and the mounting groove penetrates the second cover body along a first set direction. The camshaft includes an exhaust camshaft, and when observed from the first set direction, the mounting groove and the exhaust camshaft at least partially overlap.

[0010] Furthermore, the cylinder head has an ignition channel penetrating the cylinder head along a second set direction, and a side wall of the second cover body portion facing away from the first cover body portion substantially extends along the second set direction.

[0011] Furthermore, the cylinder head includes a shock absorbing structure, which passes through the timing installation space along a first set direction, and two ends of the shock absorbing structure are respectively fixedly connected to the first cover body portion and the second cover body portion.

[0012] Furthermore, the cylinder head includes a buffer member disposed between the shock absorbing structure and the second cover body portion. When the shock absorbing structure is connected to the first cover body portion and the second cover body portion respectively, an end of the shock absorbing structure away from the first cover body portion abuts against the buffer member along a first set direction.

[0013] Furthermore, the second cover portion has limiting protrusions distributed around the outer edge of the buffer component.

[0014] Furthermore, the engine is mounted on the vehicle frame, and an engine mounting portion is provided on the second cover portion, and at least a portion of the engine is connected to the vehicle frame via the engine mounting portion.

[0015] In a second aspect, the present application also provides a motorcycle, which comprises the engine in the above-mentioned first aspect.

[0016] The engine reduces the number of accessories required for installing the first cover body and the second cover body by providing an integrally formed cylinder head, and because the first cover body and the second cover body are integrally formed, the sealing effect between the cylinder head and the cylinder head cover is better when the two are connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the engine in the implementation manner of this application;

[0018] Figure 2 A schematic diagram of a motorcycle in an embodiment of the present application;

[0019] Figure 3 This is a partial structural schematic diagram of an engine in an embodiment of the present application;

[0020] Figure 4 A schematic diagram of a cylinder head from a first perspective in an embodiment of the present application;

[0021] Figure 5 A schematic diagram of a cylinder head from a second viewing angle in an embodiment of the present application;

[0022] Figure 6 A cross-sectional view of a cylinder head in an embodiment of the present application;

[0023] Figure 7 In the implementation mode of this application Figure 6 Enlarged view of point A. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the specific implementation manner of the present application will be clearly and completely described below in conjunction with the drawings in the implementation manner of the present application.

[0025] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. "First", "second", "third", "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", "third", "fourth" may explicitly or implicitly include at least one of the features. The singular forms "a", "said", and "the" used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0026] This application proposes Figure 1 An engine 100 is shown, which is suitable for Figure 2 The motorcycle 200 shown in the figure is used as a power source of the motorcycle 200 to provide power to drive the motorcycle 200. The motorcycle 200 also includes basic components of the vehicle, such as a frame 21, a suspension assembly 22, and a running assembly 23. The present application does not specifically limit the type of the motorcycle 200, and the motorcycle 200 using the engine 100 includes but is not limited to off-road vehicles, cruisers, scooters, rally vehicles, etc.

[0027] like Figure 1As shown, the engine 100 includes an oil pan 11, a crankcase 12, a cylinder block 13, a cylinder head 14 and a cylinder head cover 15. The oil pan 11 is used to store lubricating oil, and the lubricating oil is delivered to various parts of the engine 100 through an oil pump arranged in the oil pan 11. The crankcase 12 is arranged in the oil pan 11, and is used to set a crankshaft connecting rod mechanism (not shown) of the engine 100, and output the power generated by the engine 100 through the crankshaft connecting rod mechanism. The cylinder block 13 is arranged in the crankcase 12, and the cylinder block 13 includes a combustion chamber for burning a fuel-fuel mixture to convert chemical energy into internal energy. The cylinder head 14 is arranged in the cylinder block 13, as shown in FIG. Figure 3 As shown, the engine 100 includes an intake and exhaust mechanism 16, a camshaft 17 and a timing system 18 provided on a cylinder head 14. The camshaft 17 acts on the intake and exhaust mechanism 16, and the timing system 18 is connected to the camshaft 17 and the crankshaft connecting rod mechanism respectively. The cylinder head cover has a mounting surface mounted to the cylinder head, and the cylinder head cover 15 is sealed and connected to the cylinder head 14 through the mounting surface to seal the engine 100. In order to clearly illustrate the technical solution of the present application, the following is also provided: Figure 1 The up-down, left-right, and front-back directions shown are the up-down, left-right, and front-back directions of the engine 100 .

[0028] like Figure 3 and Figure 4 As shown, as an implementation method, the extension direction of the camshaft 17 is defined as a first set direction, and the cylinder head 14 includes a first cover body portion 141 and a second cover body portion 142 distributed along the first set direction. The first cover body portion 141 constitutes the main structure of the cylinder head 14, which is used to set the camshaft 17 and the intake and exhaust mechanism 16. When the camshaft 17 is arranged on the first cover body portion 141, the camshaft 17 can rotate relative to the first cover body portion 141 along its own circumferential direction. The second cover body portion 142 is integrally formed with the first cover body portion 141, and the second cover body portion 142 is covered on one side of the first cover body portion 141 along the first set direction, and a timing installation space 143 is formed between the second cover body portion 142 and the first cover body portion 141, and at least part of the timing system 18 is arranged in the timing installation space 143.

[0029] Specifically, the first cover body portion 141 has a first sealing area 1411 facing the cylinder head cover 15, and the second cover body portion 142 has a second sealing area 1421 facing the cylinder head cover 15. When the cylinder head 14 is connected to the cylinder head cover 15, the first sealing area 1411 abuts against the mounting surface of the cylinder head cover 15, and the second sealing area 1421 abuts against the mounting surface of the cylinder head cover 15.

[0030] In the prior art, a side cover needs to be provided on one side of the cylinder head to seal the space where the timing system is located in the axial direction of the camshaft. In this way, the cylinder head cover needs to be connected to the end faces of the cylinder head and the side cover respectively. Since the cylinder head and the side cover are independent parts, they are connected by bolts. Even after being fastened by bolts, there is still a certain installation gap between the cylinder head and the side cover, resulting in a discontinuous end face between the cylinder head and the side cover for connecting the cylinder head cover. At this time, when the cylinder head cover is connected to the cylinder head, the sealing effect of the engine may be poor.

[0031] In the technical solution of the present application, the first cover body portion 141 and the second cover body portion 142 are integrally formed, so that the first sealing area 1411 and the second sealing area 1421 form a continuous cylinder head sealing area 144. When the cylinder head 14 is connected to the cylinder head cover 15, the cylinder head 14 abuts against the mounting surface of the cylinder head cover 15 through the cylinder head sealing area 144, so that the connection between the cylinder head 14 and the cylinder head cover 15 is tighter and the sealing effect is better.

[0032] like Figure 4 and Figure 5 As shown, as an implementation, the intake and exhaust mechanism 16 includes an intake mechanism 161 and an exhaust mechanism 162, wherein the intake mechanism 161 is used to control the fuel mixture to enter the combustion chamber, and the exhaust mechanism 162 is used to discharge the exhaust gas after combustion from the combustion chamber. The camshaft 17 includes an intake camshaft 171, and the intake camshaft 171 acts on the intake mechanism 161 to control the working timing of the intake mechanism 161. The second cover body 142 has a notch 1422 opening toward the top of the cylinder head 14, and when viewed from the first set direction, the notch 1422 overlaps with the intake camshaft 171.

[0033] Specifically, the first cover body 141 has a shaft seat 1412 for mounting the camshaft 17. During the processing of the cylinder head 14, since the first cover body 141 and the second cover body 142 are integrally formed, the second cover body 142 disposed on one side of the first cover body 141 along the first set direction will interfere with the processing of the shaft seat 1412. Therefore, by providing a notch 1422 on the second cover body 142, a tool for processing the shaft seat 1412 can pass through the notch 1422 along the first set direction and move to the position of the shaft seat 1412 to achieve processing of the shaft seat 1412, thereby avoiding interference between the tool and the second cover body 142 and improving the processing efficiency of the cylinder head 14.

[0034] Optionally, a through hole may be provided on the second cover portion 142 and penetrates the second cover portion 142 along the first set direction, so that the tool can pass through the channel along the first set direction and reach the position of the shaft seat 1412 .

[0035] like Figure 3 and Figure 4As shown, as an implementation, the camshaft 17 includes an exhaust camshaft 172, and the exhaust camshaft 172 acts on the exhaust mechanism 162 to control the working timing of the exhaust mechanism 162. The engine 100 also includes a solenoid valve 19 provided on the cylinder head 14, and the solenoid valve 19 is connected to the timing system 18, wherein the timing system 18 includes a first timing gear and a second timing gear, the first timing gear is connected to the intake mechanism 161 through the intake camshaft 171, and the second timing gear is connected to the exhaust mechanism 162 through the exhaust camshaft 172. The solenoid valve 19 is provided on the first cover body 141 and connected to the second timing gear. The solenoid valve 19 acts on the second timing gear to adjust the working timing of the exhaust mechanism 162, and adjust the phase of the exhaust camshaft 172, so that the time of valve opening and closing changes with the change of the speed of the engine 100, so as to improve the charging efficiency and increase the power of the engine 100.

[0036] like Figure 5 As shown, the second cover body 142 is provided with a mounting groove 1423 for mounting the solenoid valve 19, and the mounting groove 1423 penetrates the second cover body 142 along the first set direction. When viewed from the first set direction, the mounting groove 1423 overlaps at least part of the exhaust camshaft 172. In addition to being used to assemble the solenoid valve 19, the mounting groove 1423 is also reused as a tool avoidance tool. The tool used to process the shaft seat 1412 can pass through the mounting groove 1423 along the first set direction and move to the position of the shaft seat 1412 to achieve the processing of the shaft seat 1412, avoid interference between the tool and the second cover body 142, and improve the processing efficiency of the cylinder head 14.

[0037] like Figure 6 As shown, as an implementation, the engine 100 also includes an ignition mechanism (not shown) for igniting the fuel mixture, and the cylinder head 14 includes an ignition channel 145 for setting the ignition mechanism, and the extension direction of the ignition channel 145 is defined as a second set direction. The second cover body 142 basically extends along the second set direction. Specifically, a side wall of the second cover body 142 away from the first cover body 141 extends along the second set direction, so that the timing installation space 143 formed between the second cover body 142 and the first cover body 141 has a larger width in the first set direction, avoiding interference between the second cover body 142 and the timing system 18, and the timing installation space 143 with a larger width is more convenient for the assembly of the timing system 18, reducing the difficulty of assembling the timing system 18.

[0038] Furthermore, the cylinder head 14 further includes a shock absorbing structure 146, which is disposed between the first cover body 141 and the second cover body 142, specifically in the timing installation space 143. Both ends of the shock absorbing structure 146 are fixedly connected to the first cover body 141 and the second cover body 142, respectively, to reduce the relative vibration between the first cover body 141 and the second cover body 142.

[0039] Exemplarily, the shock-absorbing structure 146 is a bolt, which passes through the second cover body portion 142 along a first set direction and extends from the second cover body portion 142 toward the first cover body portion 141 until one end of the bolt is fixedly connected to the first cover body portion 141, wherein the fixed connection method includes at least one of the following connection methods: threaded connection, interference connection, and clamping.

[0040] The other end of the shock-absorbing structure 146 contacts the second cover body 142 along the first set direction and applies a pre-tightening force to the second cover body 142 in the direction of the first cover body 141, so as to avoid relative vibrations of different frequencies between the first cover body 141 and the second cover body 142 when the timing system 18 is working, thereby ensuring the overall structural strength of the cylinder head 14.

[0041] like Figure 7 As shown, specifically, the cylinder head 14 includes a buffer 147 disposed between the shock absorbing structure 146 and the second cover body 142, wherein the buffer 147 may be a buffer rubber pad or a metal washer. When the second cover body 142 is connected to the first cover body 141 through the shock absorbing structure 146, the end of the shock absorbing structure 146 away from the first cover body 141 abuts against the buffer 147 along the first set direction, and the vibration generated by the second cover body 142 is further absorbed by the buffer 147, so that the overall structure of the engine 100 is more stable.

[0042] like Figure 5 As shown, the end surface of the second cover body 142 facing away from the first cover body 141 has a limiting protrusion 1424 which is basically consistent with the outer contour shape of the buffer 147. When the buffer 147 is arranged on the second cover body 142, the limiting protrusion 1424 limits the buffer 147 in the circumferential direction of the buffer 147.

[0043] The second cover body 142 is also provided with a number of engine mounting parts 1425, and the engine 100 is fixed on the frame and fixed to the frame through the engine mounting parts 1425. In order to meet the stability of the engine 100 when it is fixed, the engine mounting part 1425 needs to meet certain rigidity requirements. In the related art, the cylinder head uses a detachable side cover to close the space for installing the timing system. The side cover cannot meet the rigidity requirements, resulting in the inability to set the corresponding engine mounting part on the side cover. In the example of the present application, since the second cover body 142 and the first cover body 141 are formed by integral casting, the second cover body 142 and the first cover body 141 can withstand a greater load, and the second cover body 142 has sufficient rigidity to connect the frame, thereby improving the stability of the engine 100 in the direction of the second cover body 142.

[0044] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to this application.

Claims

1. An engine, comprising: Cylinder head; A camshaft, the camshaft being arranged on the cylinder head, and an extending direction of a rotation center of the camshaft being defined as a first set direction; A timing system, at least part of which is disposed on the cylinder head and drivingly connected to the camshaft; a cylinder head cover, the cylinder head cover being disposed on the cylinder head; Characterized in that the cylinder head comprises: A first cover body portion and a second cover body portion are distributed along the first set direction, the second cover body portion is integrally formed with the first cover body portion, and a timing installation space for arranging the timing system is formed between the second cover body portion and the first cover body portion, and the camshaft is rotatably connected to the first cover body portion.

2. The engine according to claim 1, characterized in that The engine also includes a cylinder head cover arranged on the cylinder head, the cylinder head cover has a mounting surface mounted to the cylinder head, the first cover body has a first sealing area facing the cylinder head cover, the second cover body has a second sealing area facing the cylinder head cover, the second sealing area and the first sealing area form a continuous cylinder head sealing area, and the cylinder head abuts against the mounting surface through the cylinder head sealing area.

3. The engine according to claim 1, characterized in that The camshaft includes an intake camshaft, and the second cover body is provided with a notch opening toward the top of the cylinder head. When viewed from the first set direction, the notch overlaps with the intake camshaft.

4. The engine according to claim 1, characterized in that The engine also includes a solenoid valve, which is arranged on the second cover body and connected to the timing system; the second cover body is provided with a mounting groove for installing the solenoid valve, and the mounting groove penetrates the second cover body along the first set direction. The camshaft includes an exhaust camshaft, and when observed from the first set direction, the mounting groove and the exhaust camshaft at least partially overlap.

5. The engine according to claim 1, characterized in that The cylinder head has an ignition passage penetrating the cylinder head along a second set direction, and a side wall of the second cover body portion facing away from the first cover body portion substantially extends along the second set direction.

6. The engine according to claim 1, characterized in that The cylinder head comprises a shock absorbing structure, the shock absorbing structure passes through the timing installation space along the first set direction, and two ends of the shock absorbing structure are respectively fixedly connected to the first cover body and the second cover body.

7. The engine according to claim 6, characterized in that The cylinder head includes a buffer member disposed between the shock absorbing structure and the second cover body portion. When the shock absorbing structure is respectively connected to the first cover body portion and the second cover body portion, an end of the shock absorbing structure away from the first cover body portion abuts against the buffer member along the first set direction.

8. The engine according to claim 7, characterized in that The second cover body has limiting protrusions distributed around the outer edge of the buffer component.

9. The engine according to claim 1, characterized in that The engine is mounted on the vehicle frame, and the second cover portion is provided with an engine mounting portion, and at least a portion of the engine is connected to the vehicle frame through the engine mounting portion.

10. A motorcycle, characterized in that: Comprising an engine as claimed in any one of claims 1 to 9.

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