Slope cam shaft system with wide side area

Abstract

The invention discloses a side area wide bevel cam shaft system which comprises a cam shaft system body and a hydraulic system driving the cam shaft system body to operate, the cam shaft system body comprises a cam shaft, side area wide bevel cams, a main cylinder barrel and an auxiliary cylinder barrel, and the cam shaft is evenly and fixedly provided with a plurality of side area wide bevel cams; and one end of the cam shaft is slidably mounted in the main cylinder barrel, the other end of the cam shaft is slidably mounted in the auxiliary cylinder barrel, and due to the overall arrangement, the structure is compact, and response is rapid. Dynamic adjustment of valve timing is achieved through unique cam design and axial movement of the cam shaft. According to the scheme, a mechanical structure and a hydraulic system controlled by a motor are combined, so that the performance and efficiency of the engine are optimized. The hydraulic system controlled by the motor accurately controls oil pressure so as to achieve accurate adjustment of the position of the cam shaft.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, and particularly to a side area wide inclined surface camshaft system. Background Art

[0002] The traditional variable valve timing technology, also known as VVT (Variable Valve Timing) technology, is a technology used in automotive piston engines.

[0003] The variable valve timing technology refers to adjusting the phase of the engine cam to change the valve opening time. It utilizes electronic, hydraulic, and mechanical technologies to achieve control over the opening timing of the intake and exhaust valves, and realizes a variable and intelligent "overlap phase". This technology enables the engine to freely adjust the valve opening time according to different operating conditions, thereby enhancing the power performance and making the combustion more efficient.

[0004] The variable valve timing system mainly consists of a VVT oil system, a phase adjuster, an oil control valve, and various sensors, etc. Among them, the phase adjuster is the actuator of the system, responsible for adjusting the valve opening time; while the oil control valve is the controller of the system, which drives the phase adjuster by controlling the flow of oil according to the operating conditions of the engine.

[0005] The traditional variable valve timing technology adjusts the valve opening and closing timing by changing the initial phase of the camshaft to adapt to different engine operating conditions.

[0006] However, the traditional variable valve timing technology is relatively complex in structure and has low reliability.

[0007] Therefore, it is very necessary to invent a side area wide inclined surface camshaft system device. Summary of the Invention

[0008] The purpose of the present invention is to provide a side area wide inclined surface camshaft system to solve the problems of relatively complex structure and low reliability of the traditional variable valve timing technology.

[0009] To achieve the above purpose, the present invention provides the following technical solution: A side area wide inclined surface camshaft system: including a camshaft system and a hydraulic system for driving the camshaft system to operate, wherein: the camshaft system includes a camshaft, a side area wide inclined surface cam, a main cylinder barrel, and a sub-cylinder barrel. A plurality of side area wide inclined surface cams are evenly and fixedly installed on the camshaft. One end of the camshaft is slidably installed inside the main cylinder barrel, and the other end of the camshaft is slidably installed inside the sub-cylinder barrel;

[0010] The hydraulic system includes a hydraulic oil tank, a hydraulic pump, a motor, and a two-position five-way solenoid valve. The input shaft of the hydraulic pump is fixedly connected to the output end of the motor. The input port of the hydraulic pump is fixedly connected to the inside of the hydraulic oil tank through a pipeline. The input port of the hydraulic pump is fixedly connected to the P port of the two-position five-way solenoid valve through a pipeline. Both the R port and the S port of the two-position five-way solenoid valve are fixedly connected to the inside of the hydraulic oil tank through pipelines;

[0011] One end of the camshaft is coaxially and fixedly installed with a main piston piece. The main piston piece is installed in the main cylinder barrel, and the circumferential surface of the main piston piece is in sealed sliding contact with the inner surface of the main cylinder barrel;

[0012] The other end of the camshaft is coaxially and fixedly installed with a sub-piston piece. The sub-piston piece is installed in the sub-cylinder barrel, and the circumferential surface of the sub-piston piece is in sealed sliding contact with the inner surface of the sub-cylinder barrel;

[0013] The outer circumferential surface of the main cylinder barrel is provided with teeth. One end of the main cylinder barrel away from the camshaft is fixedly connected to the A port of the two-position five-way solenoid valve through a main hydraulic pipe. The connection end between the main hydraulic pipe and the main cylinder barrel is in sealed rotational connection;

[0014] A number of main limiting protrusions are evenly arranged on the circumferential surface of the main piston piece;

[0015] A number of main limiting grooves corresponding to the main limiting protrusions are evenly formed on the inner surface of the main cylinder barrel. The main limiting protrusions are sealed and slidably installed in the corresponding main limiting grooves;

[0016] One end of the sub-cylinder barrel away from the camshaft is fixedly connected to the B port of the two-position five-way solenoid valve through a sub-hydraulic pipe. The connection end between the sub-hydraulic pipe and the sub-cylinder barrel is in sealed rotational connection;

[0017] There is an angular difference between the two vertices of the side area wide inclined surface cam.

[0018] A number of I-shaped ring grooves corresponding to the camshaft gland are evenly formed on the circumferential surface of the camshaft.

[0019] An I-shaped shaft sleeve is coaxially sleeved in each of the I-shaped ring grooves. The I-shaped shaft sleeve is slidably and rotatably connected to the camshaft.

[0020] The inside of the main cylinder barrel is provided with a main piston cavity. One end of the main cylinder barrel away from the camshaft is provided with a ring groove. The diameter of the ring groove is larger than the diameter of the main piston cavity. A sealing cover is fixedly installed in the ring groove. One end of the main cylinder barrel close to the camshaft is provided with a shaft hole. One end of the camshaft with the main piston piece passes through the shaft hole and is sealed and slid into the main piston cavity. The main piston piece is slidably installed in the main piston cavity. The main piston cavity is rotationally connected to the main hydraulic pipe through the sealing cover.

[0021] A through hole for connecting with the main hydraulic pipe is provided at the center of the sealing cover. The through hole is internally communicated with the main piston chamber, and one end of the through hole is rotatably connected to the main hydraulic pipe.

[0022] A plurality of auxiliary limiting protrusions are uniformly arranged on the peripheral surface of the auxiliary piston sheet. The auxiliary limiting protrusions are slidably installed in the auxiliary cylinder barrel.

[0023] A plurality of auxiliary limiting grooves corresponding to the auxiliary limiting protrusions are uniformly formed on the inner surface of the auxiliary cylinder barrel. The auxiliary limiting protrusions are hermetically and slidably installed in the corresponding auxiliary limiting grooves.

[0024] One end of the auxiliary cylinder barrel connected to the camshaft is provided with a necking. One end of the camshaft with the auxiliary piston sheet passes through the necking and is hermetically and slidably inserted into the auxiliary cylinder barrel.

[0025] A bearing is fixedly installed coaxially on the outer surface of the auxiliary cylinder barrel.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] The structure is compact. Compared with the complex electronic control system, the structure of this solution is more compact. The compact design helps to reduce the space occupation and improve the utilization rate of the engine compartment.

[0028] Quick response. For the hydraulic system controlled by the motor, the hydraulic system controlled by the motor can quickly respond to realize the quick adjustment of the camshaft position. Quick response is particularly important for high-performance vehicles and helps to improve the driving experience.

[0029] The side area wide inclined surface camshaft system realizes the dynamic adjustment of valve timing through the unique cam design and the axial movement of the camshaft. This solution combines the mechanical structure and the hydraulic system controlled by the motor to optimize the engine performance and efficiency.

[0030] The side area wide inclined surface cam. The cam is designed with a relatively wide side area and an inclined surface, allowing the phase of the cam to change when the tappet is at different positions. This design allows the adjustment of valve timing without changing the rotation speed of the camshaft.

[0031] The hydraulic system controlled by the motor uses a hydraulic oil pump driven by the motor to realize the left and right movement of the camshaft. The oil pressure is precisely controlled to realize the precise adjustment of the camshaft position. Brief Description of the Drawings

[0032] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0033] Figure 2 It is a schematic diagram of the side area wide inclined surface cam structure of the present invention.

[0034] Figure 3 It is a schematic exploded view of the master cylinder barrel and the sealing cover of the present invention.

[0035] Figure 4 It is a schematic exploded view of the master piston piece, the master cylinder barrel and the sealing cover of the present invention.

[0036] Figure 5 It is a schematic exploded view of the auxiliary cylinder barrel and the bearing of the present invention.

[0037] Figure 6 It is a schematic exploded view of the auxiliary piston piece and the auxiliary cylinder barrel of the present invention.

[0038] Figure 7 It is a schematic enlarged view of a partial structure at position A of the present invention.

[0039] Figure 8 It is a schematic enlarged view of a partial structure at position B of the present invention.

[0040] In the figure:

[0041] Camshaft 1, side area wide inclined surface cam 2, master piston piece 3, master limit projection 31, auxiliary piston piece 4, auxiliary limit projection 41, master cylinder barrel 5, master piston cavity 51, ring groove 52, master limit groove 53, shaft hole 54, sealing cover 6, main hydraulic pipe 61, auxiliary cylinder barrel 7, auxiliary hydraulic pipe 71, necking 72, auxiliary limit groove 73, bearing 8, hydraulic oil tank 9, hydraulic pump 10, motor 11, two-position five-way solenoid valve 12, I-shaped ring groove 13, I-shaped shaft sleeve 14. Specific embodiments

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] Embodiment:

[0044] As shown in the appended Figure 1-8 figure

[0045] A side area wide inclined surface camshaft system provided by the present invention includes a camshaft system and a hydraulic system for driving the camshaft system to operate. Among them: the camshaft system includes a camshaft 1, a side area wide inclined surface cam 2, a master cylinder barrel 5 and an auxiliary cylinder barrel 7. A plurality of side area wide inclined surface cams 2 are uniformly and fixedly installed on the camshaft 1. One end of the camshaft 1 is slidably installed inside the master cylinder barrel 5, and the other end of the camshaft 1 is slidably installed inside the auxiliary cylinder barrel 7, so that the camshaft 1 can perform axial movement under the drive of the hydraulic system;

[0046] It should be noted that the two vertices of the wide side area inclined plane cam 2 are 45 degrees apart. The cam is designed with a relatively wide side area and an inclined surface, allowing the phase of the cam to change when the push rod is in different positions. This design allows the valve timing to be adjusted without changing the rotational speed of the camshaft, and at the same time can avoid the cam always contacting the valve structure through a single point, thereby reducing wear and increasing the service life;

[0047] The surfaces of the camshaft 1 and the wide side area inclined plane cam 2 are treated with wear resistance, such as chrome plating, to improve the hardness and wear resistance of the camshaft 1 and the wide side area inclined plane cam 2;

[0048] The hydraulic system includes a hydraulic oil tank 9, a hydraulic pump 10, a motor 11, and a two-position five-way solenoid valve 12. The input shaft of the hydraulic pump 10 is fixedly connected to the output end of the motor 11. The input port of the hydraulic pump 10 is fixedly connected to the inside of the hydraulic oil tank 9 through a pipeline. The input port of the hydraulic pump 10 is fixedly connected to the P port of the two-position five-way solenoid valve 12 through a pipeline. Both the R port and the S port of the two-position five-way solenoid valve 12 are fixedly connected to the inside of the hydraulic oil tank 9 through pipelines; A motor-driven hydraulic oil pump is used to move the camshaft left and right. The oil pressure is precisely controlled to achieve precise adjustment of the camshaft position;

[0049] One end of the camshaft 1 is coaxially and fixedly installed with a main piston piece 3. The main piston piece 3 is installed in the main cylinder 5. The peripheral surface of the main piston piece 3 is in sealed sliding contact with the inner surface of the main cylinder 5, so that under the action of hydraulic oil, the main piston piece 3 is driven to move inside the main cylinder 5, thereby moving the camshaft 1 towards the side of the auxiliary cylinder 7;

[0050] The other end of the camshaft 1 is coaxially and fixedly installed with an auxiliary piston piece 4. The auxiliary piston piece 4 is installed in the auxiliary cylinder 7. The peripheral surface of the auxiliary piston piece 4 is in sealed sliding contact with the inner surface of the auxiliary cylinder 7, so that under the action of hydraulic oil, the auxiliary piston piece 4 is driven to move inside the auxiliary cylinder 7, thereby moving the camshaft 1 towards the side of the main cylinder 5;

[0051] Tooth teeth are provided on the outer peripheral surface of the main cylinder 5 for connection with the engine in cooperation with the chain. One end of the main cylinder 5 away from the camshaft 1 is fixedly connected to the A port of the two-position five-way solenoid valve 12 through the main hydraulic pipe 61, so that hydraulic oil can enter the inside of the main cylinder 5 through the A port of the two-position five-way solenoid valve 12, driving the camshaft 1 towards the side of the auxiliary cylinder 7, and causing the hydraulic oil inside the auxiliary cylinder 7 to flow into the hydraulic oil tank 9 through the B port of the two-position five-way solenoid valve 12. The connection end between the main hydraulic pipe 61 and the main cylinder 5 is in sealed rotational connection to avoid entanglement of the main hydraulic pipe 61 and ensure normal oil supply;

[0052] The circumferential surface of the main piston piece 3 is evenly provided with a number of main limiting protrusions 31; the inner surface of the main cylinder barrel 5 is evenly provided with a number of main limiting grooves 53 corresponding to the main limiting protrusions 31, and the main limiting protrusions 31 are hermetically and slidably installed in the corresponding main limiting grooves 53; through the arrangement of the main limiting protrusions 31 and the main limiting grooves 53, the camshaft 1 can rotate together with the main cylinder barrel 5;

[0053] One end of the auxiliary cylinder barrel 7 away from the camshaft 1 is fixedly communicated with the B port of the two-position five-way solenoid valve 12 through the auxiliary hydraulic pipe 71, so that hydraulic oil can enter the interior of the auxiliary cylinder barrel 7 through the B port of the two-position five-way solenoid valve 12, drive the camshaft 1 to move towards the main cylinder barrel 5, and make the hydraulic oil inside the main cylinder barrel 5 flow into the hydraulic oil tank 9 through the A port of the two-position five-way solenoid valve 12. The connection end between the auxiliary hydraulic pipe 71 and the auxiliary cylinder barrel 7 is hermetically and rotatably connected to prevent the auxiliary hydraulic pipe 71 from being wound and ensure normal oil supply.

[0054] In this embodiment, a number of I-shaped ring grooves 13 corresponding to the camshaft gland are evenly provided on the circumferential surface of the camshaft 1; an I-shaped shaft sleeve 14 is coaxially sleeved in each I-shaped ring groove 13, and the I-shaped shaft sleeve 14 is slidably and rotatably connected to the camshaft 1; so as to be connected through the I-shaped shaft sleeve 14 and the camshaft gland to ensure the stability of the camshaft 1 after installation, and at the same time, it will not affect the rotation of the camshaft 1 and the movement of the camshaft 1.

[0055] In this embodiment, a main piston cavity 51 is provided inside the main cylinder barrel 5. One end of the main cylinder barrel 5 away from the camshaft 1 is provided with a ring groove 52, and the diameter of the ring groove 52 is larger than that of the main piston cavity 51. A sealing cover 6 is fixedly installed in the ring groove 52 to seal the main piston cavity 51. One end of the main cylinder barrel 5 close to the camshaft 1 is provided with a shaft hole 54. One end of the camshaft 1 with the main piston piece 3 is hermetically and slidably inserted into the main piston cavity 51 through the shaft hole 54. A lubricating medium such as lubricating oil or lubricating paste is applied between the shaft hole 54 and the camshaft 1 to enable the main cylinder barrel 5 and the camshaft 1 to move. The main piston piece 3 is slidably installed in the main piston cavity 51, and the main piston cavity 51 is rotationally communicated with the main hydraulic pipe 61 through the sealing cover 6.

[0056] In this embodiment, a through hole for connecting with the main hydraulic pipe 61 is provided at the center of the sealing cover 6, and the through hole is internally communicated with the main piston cavity 51. One end of the through hole is rotationally connected to the main hydraulic pipe 61, so that during the rotation of the main cylinder barrel 5, the main hydraulic pipe 61 will not rotate accordingly, thereby preventing the main hydraulic pipe 61 from being wound and ensuring normal oil supply.

[0057] In this embodiment, a plurality of auxiliary limiting protrusions 41 are uniformly arranged on the peripheral surface of the auxiliary piston piece 4, and the auxiliary limiting protrusions 41 are slidably installed in the auxiliary cylinder 7; a plurality of auxiliary limiting grooves 73 corresponding to the auxiliary limiting protrusions 41 are uniformly formed on the inner surface of the auxiliary cylinder 7, and the auxiliary limiting protrusions 41 are hermetically and slidably installed in the corresponding auxiliary limiting grooves 73. Through the arrangement of the auxiliary limiting protrusions 41 and the auxiliary limiting grooves 73, the auxiliary cylinder 7 can rotate together with the camshaft 1.

[0058] In this embodiment, a necking 72 is provided at one end of the auxiliary cylinder 7 connected to the camshaft 1. Through the arrangement of the necking 72, the camshaft 1 and the auxiliary cylinder 7 can move relative to each other, and the auxiliary piston piece 4 can be limited to prevent the auxiliary piston piece 4 from accidentally disengaging from the auxiliary cylinder 7. One end of the camshaft 1 with the auxiliary piston piece 4 hermetically and slidably extends into the auxiliary cylinder 7 through the necking 72, and a lubricating medium such as lubricating oil or lubricating paste is applied between the necking 72 and the camshaft 1.

[0059] In this embodiment, a bearing 8 is coaxially sleeved and fixedly installed on the outer surface of the auxiliary cylinder 7 to ensure the stability between the camshaft 1 and the engine valve cover and the smoothness during the rotation process through the bearing 8.

[0060] Specifically, when the push rod contacts the inclined surface of the cam, due to the design of the inclined surface, the push rod will have different phase outputs at different positions. This design allows the valve timing to be adjusted without changing the rotational speed of the camshaft.

[0061] Dynamic adjustment: The oil pressure is controlled by a hydraulic system controlled by an electric motor, so that the camshaft moves left and right axially to further adjust the phase of the cam. This movement provides an additional adjustment range to adapt to different engine operating conditions.

[0062] Real-time operating condition response: According to the real-time operating conditions of the engine, the position of the camshaft is adjusted to achieve the best valve timing.

[0063] This dynamic adjustment helps to improve the performance and efficiency of the engine.

[0064] Technical advantages of this case:

[0065] Reducing cam wear: This design has a large contact area, allowing the cam to contact the valve structure at different positions, which helps to extend the service life of the cam. Compared with the prior art, this solution changes the cam phase by axially moving the camshaft, reducing the additional pressure and wear on the cam caused by the rotating shaft.

[0066] Advantages of axial movement: Combining mechanical and motor control.

[0067] Precise control: Utilize a motor-controlled hydraulic system to achieve precise adjustment of the camshaft position. This precise control helps improve the performance and response speed of the engine.

[0068] Compact structure: Compared with complex electronic control systems, the design of this solution is more compact. The compact design helps reduce space occupancy and improve the utilization rate of the engine compartment.

[0069] Quick response: The motor-controlled hydraulic system can respond quickly to achieve rapid adjustment of the camshaft position. Quick response is particularly important for high-performance vehicles and helps enhance the driving experience.

[0070] All types of components used in this application document are standard parts. The specific connection methods of each part all adopt conventional means such as threads, bolts, and nesting that are mature in the prior art. Each structure uses conventional materials in the prior art, and no specific description will be made here.

[0071] In summary: This side area wide inclined surface camshaft system is compact in structure and has a rapid response through the overall setting. The side area wide inclined surface camshaft system realizes dynamic adjustment of valve timing through a unique cam design and axial movement of the camshaft. This solution combines a mechanical structure and a motor-controlled hydraulic system to optimize engine performance and efficiency. The motor-controlled hydraulic system uses a motor-driven hydraulic oil pump to achieve left and right movement of the camshaft. Precise control of the oil pressure is used to achieve precise adjustment of the camshaft position.

[0072] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A camshaft system with wide side surface, characterized in that: The invention comprises a camshaft system and a hydraulic system for driving the camshaft system to operate, wherein: the camshaft system comprises a camshaft (1), a cam with a wide side surface area (2), a main cylinder barrel (5) and a secondary cylinder barrel (7); a plurality of cams with a wide side surface area (2) are evenly and fixedly mounted on the camshaft (1); one end of the camshaft (1) is slidably mounted inside the main cylinder barrel (5), and the other end of the camshaft (1) is slidably mounted inside the secondary cylinder barrel (7); The hydraulic system comprises a hydraulic oil tank (9), a hydraulic pump (10), a motor (11) and a two-position five-way solenoid valve (12); the input shaft of the hydraulic pump (10) is fixedly connected to the output end of the motor (11); the input port of the hydraulic pump (10) is fixedly connected to the interior of the hydraulic oil tank (9) through a pipeline; the input port of the hydraulic pump (10) is fixedly connected to the P port of the two-position five-way solenoid valve (12) through a pipeline; and the R port and the S port of the two-position five-way solenoid valve (12) are both fixedly connected to the interior of the hydraulic oil tank (9) through a pipeline; A main piston plate (3) is coaxially fixedly mounted on one end of the camshaft (1), the main piston plate (3) is mounted in a main cylinder barrel (5), and the peripheral surface of the main piston plate (3) is in sealing sliding contact with the inner surface of the main cylinder barrel (5); A secondary piston plate (4) is coaxially fixedly mounted on the other end of the camshaft (1), the secondary piston plate (4) being mounted in a secondary cylinder barrel (7), the peripheral surface of the secondary piston plate (4) being in sealing sliding contact with the inner surface of the secondary cylinder barrel (7); The outer peripheral surface of the master cylinder (5) is provided with teeth, and one end of the master cylinder (5) away from the camshaft (1) is fixedly connected to the A port of the two-position five-way solenoid valve (12) through the main hydraulic pipe (61), and the main hydraulic pipe (61) and the connecting end of the master cylinder (5) are sealed and rotatably connected; The circumferential surface of the main piston plate (3) is evenly provided with a plurality of main limiting protrusions (31); The inner surface of the main cylinder (5) is evenly provided with a plurality of main limiting grooves (53) corresponding to the main limiting protrusions (31), and the main limiting protrusions (31) are sealingly slidably installed in the corresponding main limiting grooves (53); One end of the auxiliary cylinder (7) away from the camshaft (1) is fixedly connected to the B port of the two-position five-way solenoid valve (12) through the auxiliary hydraulic pipe (71), and the auxiliary hydraulic pipe (71) and the connecting end of the auxiliary cylinder (7) are sealed and rotatably connected; An angle difference is provided between two vertices of the lateral wide inclined surface cam (2).

2. A camshaft system with wide side surface area as claimed in claim 1, characterized in that: The circumferential surface of the camshaft (1) is evenly provided with a plurality of I-shaped ring grooves (13) corresponding to the camshaft pressure cover.

3. A camshaft system with wide side surface area as claimed in claim 2, characterized in that: Each coaxial sleeve in each I-shaped ring groove (13) is provided with an I-shaped shaft sleeve (14), and the I-shaped shaft sleeve (14) is slidably and rotatably connected to the camshaft (1).

4. A camshaft system with wide side surface area as claimed in claim 1, characterized in that: A main piston chamber (51) is arranged inside the main cylinder (5); an annular groove (52) is provided at one end of the main cylinder (5) away from the camshaft (1); a sealing cover (6) is fixedly installed in the annular groove (52); an axial hole (54) is provided at one end of the main cylinder (5) close to the camshaft (1); one end of the camshaft (1) with the main piston plate (3) extends into the main piston chamber (51) in a sealed sliding manner through the axial hole (54); the main piston plate (3) is slidably installed in the main piston chamber (51); and the main piston chamber (51) is rotatably connected to the main hydraulic pipe (61) through the sealing cover (6).

5. A camshaft system with wide side surface area as claimed in claim 4, characterized in that: A through hole for connecting with the main hydraulic pipe (61) is provided at the center of the sealing cover (6), the through hole is communicated with the interior of the main piston chamber (51), and the through hole is rotatably connected to one end of the main hydraulic pipe (61).

6. A camshaft system with wide side surface area as claimed in claim 1, characterized in that: A plurality of auxiliary limiting protrusions (41) are evenly arranged on the circumferential surface of the auxiliary piston plate (4), and the auxiliary limiting protrusions (41) are slidably installed in the auxiliary cylinder barrel (7).

7. A camshaft system with wide side surface area as claimed in claim 6, characterized in that: The inner surface of the auxiliary cylinder (7) is evenly provided with a plurality of auxiliary limiting grooves (73) corresponding to the auxiliary limiting protrusions (41), and the auxiliary limiting protrusions (41) are sealingly slidably installed in the corresponding auxiliary limiting grooves (73).

8. A camshaft system with wide side surface area as claimed in claim 7, characterized in that: One end of the auxiliary cylinder barrel (7) connected to the camshaft (1) is provided with a closing opening (72), and one end of the camshaft (1) with the auxiliary piston plate (4) extends into the auxiliary cylinder barrel (7) through the closing opening (72) in a sealed and sliding manner.

9. A camshaft system with wide side surface area as claimed in claim 8, characterized in that: A bearing (8) is coaxially sleeved and fixedly mounted on the outer surface of the auxiliary cylinder (7).

Images