Pedal force simulation control method and pedal simulation control system

Abstract

The present application relates to the technical field of brake system, and discloses a pedal force simulation control method and a pedal simulation control system, wherein the pedal force simulation system using the method is divided into two stroke sections when working, the electromagnetic valve is in the communication state in the first stroke section, at this time, the pedal piston slides relative to the cylinder body and only bears the friction force between the pedal piston and the cylinder body, and the force of the oil liquid acting on the pedal piston when the oil liquid in the piston cavity flows back to the liquid storage pot. When the electromagnetic valve is in the disconnected state, the oil liquid in the piston cavity enters the pedal simulator, at this time, the pedal simulator works. When the driver sets the first stroke amount as A, the pedal piston moves a=A relative to the cylinder body, the electromagnetic valve is switched to the disconnected state, and then the second stroke is entered. When a<A, the electromagnetic valve is in the communication state, and then the first stroke is located. The method and the system can realize real-time adjustment of the relationship between the pedal stroke and the pedal force, do not need to disassemble and replace parts, and are simple in operability.

Description

Technical Field

[0001] This invention relates to the field of braking system technology, and more particularly to a pedal force simulation control method and a pedal simulation control system. Background Technology

[0002] As automotive chassis become increasingly electrified, the demand for intelligent control of chassis braking is rising. The brake actuator at the pedal end is shifting from traditional vacuum boosters to electronic brakes. To achieve adjustable pedal feel, most current electronic brakes employ a decoupling method, meaning the input at the pedal actuator end and the actual pressure build-up are independent, and their relationship can be adjusted via software. The pedal actuator end is essentially a pedal force simulation system, which simulates the driver's feeling when pressing the pedal, establishing the relationship between pedal travel and pedal force.

[0003] Most pedal force simulation systems on the market can only realize the relationship between pedal travel and pedal force. If you want to adjust the relationship between force and travel, you can only do so by disassembling and replacing internal mechanical parts, which is quite complicated. The same pedal force simulation system cannot achieve real-time adjustment of travel and force. Summary of the Invention

[0004] The purpose of this invention is to provide a pedal force simulation control method and a pedal simulation control system to solve the problem that current pedal force simulation systems can only achieve a fixed relationship between pedal travel and pedal force. If the relationship between force and travel needs to be adjusted, it can only be achieved by disassembling and replacing internal mechanical parts, which is relatively complicated to operate. The same pedal force simulation system cannot achieve real-time adjustment of travel and force.

[0005] On one hand, the present invention provides a pedal force simulation control method. The pedal force simulation system includes a reservoir, a pedal simulator, a solenoid valve, and a main cylinder mechanism. The main cylinder mechanism includes a cylinder body and a pedal piston slidably disposed in a piston chamber of the cylinder body. The cylinder body is provided with a first oil inlet, which is located on a side wall near the bottom of the piston chamber. The first oil inlet is connected to the reservoir through the solenoid valve. The cylinder body is connected to the pedal simulator, and the pedal simulator is configured to provide a pedal simulated force to the pedal piston.

[0006] The pedal force simulation control method includes:

[0007] S10: Monitor the actual displacement a of the pedal piston relative to the cylinder;

[0008] S20: If the actual displacement a of the pedal piston relative to the cylinder is less than the set displacement A of the pedal piston relative to the cylinder, execute S30; if a is equal to A, execute S40.

[0009] S30: The solenoid valve is in the connected state and S10 continues to be executed;

[0010] S40: The solenoid valve switches from the connected state to the disconnected state and continues to execute S10.

[0011] As a preferred technical solution for the pedal force simulation control method, the cylinder body is further provided with a second oil inlet. The second oil inlet is located at the end of the first oil inlet away from the bottom of the piston chamber and is spaced apart from the first oil inlet. When the pedal piston is in the initial position, the distance between the pedal piston and the second oil inlet is A1.

[0012] Step S20 also includes: A is greater than A1.

[0013] As a preferred technical solution for the pedal force simulation control method, step S20 further includes: if a is greater than A, then execute S50: adjust the opening degree of the solenoid valve according to the force that drives the pedal piston to slide.

[0014] As a preferred technical solution for the pedal force simulation control method, the master cylinder mechanism further includes a stroke sensor;

[0015] In step S10, the stroke sensor monitors the actual displacement a of the pedal piston relative to the cylinder.

[0016] As a preferred technical solution for the pedal force simulation control method, the master cylinder mechanism further includes a pressure sensor;

[0017] In step S50: the pressure sensor monitors the force that drives the pedal piston to slide.

[0018] On the other hand, the present invention provides a pedal simulation control system, employing any of the pedal force simulation control methods described above. The pedal force simulation system includes a reservoir, a pedal simulator, a solenoid valve, and a main cylinder mechanism. The reservoir stores oil. The main cylinder mechanism includes a cylinder body and a pedal piston. The cylinder body has an open piston chamber. The pedal piston is inserted into the piston chamber through the open chamber and is sealed to the inner wall of the cylinder body. The cylinder body has a first oil inlet, a second oil inlet, and an oil outlet. The first oil inlet is located on the side wall near the bottom of the piston chamber and is connected to the reservoir via the solenoid valve. The second oil inlet is located at the end of the first oil inlet away from the bottom of the piston chamber and is spaced apart from the first oil inlet. The oil outlet is connected to both the piston chamber and the inlet of the pedal simulator. The pedal simulator is configured to provide pedal simulation force to the pedal piston.

[0019] As a preferred technical solution for the pedal simulation control system, the master cylinder mechanism further includes two sealing rings, which are disposed on the inner wall of the piston chamber and located on both sides of the second oil inlet along the axial direction of the piston chamber.

[0020] As a preferred technical solution for the pedal simulation control system, the master cylinder mechanism further includes a first elastic element, which is disposed in the piston chamber. One end of the first elastic element abuts against the pedal piston, and the other end abuts against the cylinder body.

[0021] As a preferred technical solution for the pedal simulation control system, the pedal simulator includes a simulated cylinder, a simulated piston, and an elastic component. The simulated cylinder is provided with a cavity, and the simulated piston is disposed in the cavity and slides along the axis of the cavity. The simulated piston divides the cavity into a first cavity and a second cavity that are sealed to each other. The oil inlet of the pedal simulator communicates with the first cavity. The elastic component is disposed in the second cavity, with one end abutting against the simulated piston and the other end abutting against the simulated cylinder. The elastic component is elastic along the axial direction of the cavity.

[0022] As a preferred technical solution for the pedal simulation control system, the elastic component includes a second elastic element, a third elastic element, and a support frame. One end of the second elastic element abuts against the simulated piston, the other end of the second elastic element abuts against one end of the support frame, the other end of the support frame abuts against one end of the third elastic element, and the other end of the third elastic element abuts against the simulated cylinder. The second elastic element and the third elastic element are elastic along the axial direction of the cavity, and the elastic coefficients of the second elastic element and the third elastic element are different.

[0023] The beneficial effects of this invention are as follows:

[0024] The present invention provides a pedal force simulation control method and a pedal simulation control system. The pedal force simulation system includes a liquid storage pot, a pedal simulator, a solenoid valve, and a master cylinder mechanism. The master cylinder mechanism includes a cylinder block and a pedal piston slidably disposed within the cylinder block. The cylinder block is provided with a first oil inlet, which is disposed on the side wall near the bottom of the piston cavity. The first oil inlet is connected to the liquid storage pot through the solenoid valve. The cylinder block is connected to the pedal simulator, and the pedal simulator is configured to provide a pedal simulation force to the pedal piston. The pedal force simulation control method includes: S10: Monitoring the actual displacement a of the pedal piston relative to the cylinder block; S20: If the actual displacement a of the pedal piston relative to the cylinder block is less than the set displacement A of the pedal piston relative to the cylinder block, execute S30; if a is equal to A, execute S40; S30: The solenoid valve is in a connected state and continue to execute S10; S40: The solenoid valve is switched from the connected state to the disconnected state and continue to execute S10. When the pedal force simulation system using this method is working, the pedal piston is divided into two stroke segments. The first stroke segment is when the solenoid valve is in a connected state. At this time, during the sliding process of the pedal piston relative to the cylinder block, it is only affected by the friction between the pedal piston and the cylinder block, and the force exerted by the oil in the piston cavity on the pedal piston when the oil flows back to the liquid storage pot. When the solenoid valve is in the disconnected state, the oil in the piston cavity cannot flow back to the liquid storage pot and then enters the pedal simulator. At this time, the pedal piston adds the force exerted by the pedal simulator on the pedal piston through the oil. When the driver sets the first stroke amount as A and the driver drives the pedal piston to move a = A relative to the cylinder block, the solenoid valve is switched from the connected state to the disconnected state, and then the pedal piston enters the second stroke. When the actual stroke a of the pedal piston relative to the cylinder block is less than A, the solenoid valve remains in the connected state, and then the pedal piston slides within the first stroke. This method and system can achieve real-time adjustment of the relationship between the pedal stroke and the pedal force, without the need to disassemble and replace internal mechanical components, and the operability is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a flowchart of the pedal force simulation control method in an embodiment of the present invention;

[0026] Figure 2 is a schematic structural diagram of the pedal simulation control system in an embodiment of the present invention (the solenoid valve is in a connected state);

[0027] Figure 3 is a schematic structural diagram of the pedal simulation control system in an embodiment of the present invention (the solenoid valve is in a disconnected state);

[0028] Figure 4 is a curve graph of the pedal stroke and the pedal force in an embodiment of the present invention.

[0029] In the figure:

[0030] 1. Liquid storage pot;

[0031] 2. Pedal simulator; 21. Simulated cylinder; 22. Simulated piston; 23. Elastic component; 231. Second elastic element; 232. Third elastic element; 233. Support frame;

[0032] 31. Cylinder block; 311. Piston chamber; 312. First oil inlet; 313. Second oil inlet; 314. Oil outlet; 32. Pedal piston; 33. Sealing ring; 34. First elastic element; 35. Pressure sensor; 36. Stroke sensor;

[0033] 4. Solenoid valve. Detailed Implementation

[0034] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0038] As Figures 1-3 shown, this embodiment provides a pedal force simulation control method. The pedal force simulation system includes a liquid storage pot 1, a pedal simulator 2, a solenoid valve 4, and a master cylinder mechanism. The master cylinder mechanism includes a cylinder block 31 and a pedal piston 32 slidably disposed within the cylinder block 31. The cylinder block 31 is provided with a first oil inlet 312, and the first oil inlet 312 is disposed on the side wall near the bottom of the piston chamber 311. The first oil inlet 312 is connected to the liquid storage pot 1 through the solenoid valve 4. The cylinder block 31 and the pedal simulator 2 are connected, and the pedal simulator 2 is configured to provide a pedal simulation force to the pedal piston 32. The pedal force simulation control method includes: S10: Monitoring the actual displacement a of the pedal piston 32 relative to the cylinder block 31; S20: If the actual displacement a of the pedal piston 32 relative to the cylinder block 31 is less than the set displacement A of the pedal piston 32 relative to the cylinder block 31, execute S30; if a is equal to A, execute S40; S30: The solenoid valve 4 is in a connected state and continue to execute S10; S40: The solenoid valve 4 is switched from the connected state to the disconnected state and continue to execute S10. When the pedal force simulation system using this method is working, the pedal piston 32 is divided into two stroke segments. The first stroke segment is when the solenoid valve 4 is in a connected state. At this time, during the sliding process of the pedal piston 32 relative to the cylinder block 31, it is only affected by the friction between the pedal piston 32 and the cylinder block 31, and the force exerted by the oil in the piston chamber 311 on the pedal piston 32 when the oil in the piston chamber 311 flows back to the liquid storage pot 1. When the solenoid valve 4 is in a disconnected state, the oil in the piston chamber 311 cannot flow back into the liquid storage pot 1 and then enters the pedal simulator 2. At this time, the pedal piston 32 adds the force exerted by the pedal simulator 2 on the pedal piston 32 through the oil. When the driver sets the first stroke amount as A, when the driver drives the pedal piston 32 to move a = A relative to the cylinder block 31, the solenoid valve 4 is switched from the connected state to the disconnected state, and then the pedal piston 32 enters the second stroke. When the actual stroke a of the pedal piston 32 relative to the cylinder block 31 is less than A, the solenoid valve 4 remains in a connected state, and then the pedal piston 32 slides within the first stroke. This method and system can achieve real-time adjustment of the relationship between the pedal stroke and the pedal force, without the need to disassemble and replace internal mechanical components, and the operability is simple. Specifically, the master cylinder mechanism further includes a stroke sensor 36; in step S10, the stroke sensor 36 monitors the actual displacement a of the pedal piston 32 relative to the cylinder block 31.

[0039] Optionally, the cylinder block 31 is also provided with a second oil inlet 313. The second oil inlet 313 is located at the end of the first oil inlet 312 away from the bottom of the piston chamber 311 and is spaced apart from the first oil inlet 312. When the pedal piston 32 is in the initial position, the distance between the pedal piston 32 and the second oil inlet 313 is A1. Step S20 also includes: A is greater than A1. In this embodiment, the initial position of the pedal piston 32 is when it is at its maximum position away from the bottom of the piston chamber 311. At this time, the pedal piston 32 is located on the side of the second oil inlet 313 away from the first oil inlet 312. Since the second oil inlet 313 is always connected to the reservoir 1, the pedal piston 32 and the cylinder 31 enclose the piston chamber 311 into a sealed cavity. When the second oil inlet 313 is connected to the piston chamber 311, regardless of whether the solenoid valve 4 is open or closed, the oil in the piston chamber 311 can flow back to the reservoir 1. When the pedal piston 32 blocks the second oil inlet 313, the oil in the piston chamber 311 can only flow back to the reservoir 1 through the first oil inlet 312. Therefore, A1 is the minimum first stroke of the pedal piston 32. When the driver adjusts the value of A, it can only be greater than A1.

[0040] Optionally, step S20 further includes: if a is greater than A, then execute S50: adjust the opening of the solenoid valve 4 according to the sliding force of the driving pedal piston 32. In this embodiment, when the pedal piston 32 is in the second stroke, the driver can adjust the opening of the solenoid valve 4 by sensing the force of the pressure plate piston, thereby adjusting the relationship between the stroke of the pedal piston 32 and the pedal force in the second stroke. Specifically, the master cylinder mechanism also includes a pressure sensor 35; in step S50: the pressure sensor 35 monitors the sliding force of the driving pedal piston 32.

[0041] This embodiment also provides a pedal simulation control system, which adopts the pedal force simulation control method in the above scheme. The pedal force simulation system includes a reservoir 1, a pedal simulator 2, a solenoid valve 4, and a main cylinder mechanism. The reservoir 1 stores oil. The main cylinder mechanism includes a cylinder body 31 and a pedal piston 32. The cylinder body 31 has an open piston chamber 311. The pedal piston 32 is inserted into the piston chamber 311 through the open and is sealed to the inner wall of the cylinder body 31. The cylinder body 31 has a first oil inlet 312, a second oil inlet 313, and an oil outlet 314. The first oil inlet 312 is located on the side wall near the bottom of the piston chamber 311 and is connected to the reservoir 1 through the solenoid valve 4. The second oil inlet 313 is located at the end of the first oil inlet 312 away from the bottom of the piston chamber 311 and is spaced apart from the first oil inlet 312. The oil outlet 314 is connected to the oil inlets of the piston chamber 311 and the pedal simulator 2, respectively. The pedal simulator 2 is configured to provide pedal simulation force to the pedal piston 32. In this embodiment, the pedal piston 32 includes a piston body, a transmission rod, and a pedal. The piston body is slidably disposed in the piston cavity 311. One end of the transmission rod is fixedly connected to the piston body, and the other end is fixedly connected to the pedal. When the driver presses the pedal, the piston body can slide in the piston cavity 311.

[0042] Specifically, in this embodiment, the solenoid valve 4 is a normally open solenoid valve. In other embodiments, the solenoid valve 4 can also be a normally closed solenoid valve. Before executing step S10, step S00 is executed first: when the pedal piston 32 is detected to be under force, the solenoid valve 4 is switched from the disconnected state to the connected state.

[0043] Optionally, the master cylinder mechanism further includes two sealing rings 33, which are disposed on the inner wall of the piston cavity 311 and located on both sides of the second oil inlet 313 along the axial direction of the piston cavity 311. In this embodiment, when the piston body is opposite to the second oil inlet 313, the two sealing rings 33 abut against the piston body and the inner wall of the piston cavity 311 respectively, thereby preventing the oil in the piston cavity 311 from flowing back into the reservoir 1 through the second oil inlet 313.

[0044] Optionally, the master cylinder mechanism further includes a first elastic element 34, which is disposed in the piston chamber 311. One end of the first elastic element 34 abuts against the pedal piston 32, and the other end abuts against the cylinder body 31. In this embodiment, when the pedal piston 32 is not subjected to the force of the driver, the first elastic element 34 can drive the pedal piston 32 to quickly return to its initial position. Simultaneously, the pedal piston 32 receives the elastic force of the first elastic element 34 during both the first and second stroke segments. Specifically, the first elastic element 34 is a coil spring.

[0045] Optionally, the pedal simulator 2 includes a simulated cylinder 21, a simulated piston 22, and an elastic component 23. The simulated cylinder 21 has a cavity, and the simulated piston 22 is disposed in the cavity and slides along the axis of the cavity. The simulated piston 22 divides the cavity into a first cavity and a second cavity that are sealed to each other. The oil inlet of the pedal simulator 2 communicates with the first cavity. The elastic component 23 is disposed in the second cavity. One end of the elastic component 23 abuts against the simulated piston 22, and the other end abuts against the simulated cylinder 21. The elastic component 23 is elastic along the axial direction of the cavity. In this embodiment, the oil enters the first cavity under the action of the pedal piston 32, thereby driving the simulated piston 22 to move away from the oil inlet of the pedal simulator 2. At this time, the elastic component 23 is compressed, and the compressive force of the elastic component 23 reacts to the pedal piston 32 through the oil.

[0046] Optionally, the elastic component 23 includes a second elastic element 231, a third elastic element 232, and a support frame 233. One end of the second elastic element 231 abuts against the simulated piston 22, and the other end of the second elastic element 231 abuts against one end of the support frame 233. The other end of the support frame 233 abuts against one end of the third elastic element 232, and the other end of the third elastic element 232 abuts against the simulated cylinder 21. The second elastic element 231 and the third elastic element 232 are elastic along the axial direction of the cavity, and their elastic coefficients are different. In this embodiment, because the elastic coefficients of the second elastic element 231 and the third elastic element 232 are different, when the simulated piston 22 drives the second elastic element 231 and the third elastic element 232 to compress, the one with the smaller elastic coefficient compresses first, and the other compresses later.

[0047] like Figure 4 As shown in the figure, when A is A1, A2, and A3 respectively, the corresponding pedal travel and pedal force are as follows. TYPE1 is the curve corresponding to A1, TYPE2 is the curve corresponding to A2, and TYPE3 is the curve corresponding to A3.

[0048] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A pedal force simulation control method, characterized in that, The pedal force simulation system includes a reservoir (1), a pedal simulator (2), a solenoid valve (4), and a main cylinder mechanism. The main cylinder mechanism includes a cylinder body (31) and a pedal piston (32) slidably disposed in a piston chamber (311) of the cylinder body (31). The cylinder body (31) is provided with a first oil inlet (312), which is located on the side wall near the bottom of the piston chamber (311). The first oil inlet (312) is connected to the reservoir (1) through the solenoid valve (4). The cylinder body (31) is connected to the pedal simulator (2). The pedal simulator (2) is configured to provide pedal simulation force to the pedal piston (32). The pedal force simulation control method includes: S10: Monitor the actual displacement a of the pedal piston (32) relative to the cylinder (31); S20: If the actual displacement a of the pedal piston (32) relative to the cylinder (31) is less than the set displacement A of the pedal piston (32) relative to the cylinder (31), execute S30; if a is equal to A, execute S40. S30: The solenoid valve (4) is in the connected state and continues to execute S10; S40: The solenoid valve (4) switches from the connected state to the disconnected state and continues to execute S10; The cylinder body (31) is also provided with a second oil inlet (313). The second oil inlet (313) is located at the end of the first oil inlet (312) away from the bottom of the piston chamber (311) and is spaced apart from the first oil inlet (312). When the pedal piston (32) is in the initial position, the distance between the pedal piston (32) and the second oil inlet (313) is A1. Step S20 also includes: A is greater than A1.

2. The pedal force simulation control method according to claim 1, characterized in that, Step S20 further includes: if a is greater than A, then execute S50: adjust the opening degree of the solenoid valve (4) according to the force that drives the pedal piston (32) to slide.

3. The pedal force simulation control method according to claim 1, characterized in that, The master cylinder mechanism also includes a stroke sensor (36). In step S10, the stroke sensor (36) monitors the actual displacement a of the pedal piston (32) relative to the cylinder (31).

4. The pedal force simulation control method according to claim 2, characterized in that, The master cylinder mechanism also includes a pressure sensor (35); In step S50: the pressure sensor (35) monitors the force that drives the pedal piston (32) to slide.

5. A pedal simulation control system, characterized in that, The pedal force simulation control method according to any one of claims 1-4 includes a pedal force simulation system comprising a reservoir (1), a pedal simulator (2), a solenoid valve (4), and a main cylinder mechanism. The reservoir (1) stores oil. The main cylinder mechanism includes a cylinder body (31) and a pedal piston (32). The cylinder body (31) is provided with an open piston chamber (311). The pedal piston (32) is inserted into the piston chamber (311) through the open and is sealed to the inner wall of the cylinder body (31). The cylinder body (31) is provided with a first oil inlet (312), a second oil inlet (313), and an oil outlet (314). 14), the first oil inlet (312) is located on the side wall near the bottom of the piston chamber (311), the first oil inlet (312) is connected to the reservoir (1) through the solenoid valve (4), the second oil inlet (313) is located at the end of the first oil inlet (312) away from the bottom of the piston chamber (311) and is spaced apart from the first oil inlet (312), the oil outlet (314) is connected to the oil inlet of the piston chamber (311) and the pedal simulator (2) respectively, and the pedal simulator (2) is configured to provide pedal simulation force to the pedal piston (32).

6. The pedal simulation control system according to claim 5, characterized in that, The master cylinder mechanism also includes two sealing rings (33), which are disposed on the inner wall of the piston chamber (311) and located on both sides of the second oil inlet (313) along the axial direction of the piston chamber (311).

7. The pedal simulation control system according to claim 5, characterized in that, The master cylinder mechanism also includes a first elastic element (34), which is disposed in the piston chamber (311). One end of the first elastic element (34) abuts against the pedal piston (32), and the other end abuts against the cylinder body (31).

8. The pedal simulation control system according to claim 5, characterized in that, The pedal simulator (2) includes a simulated cylinder (21), a simulated piston (22), and an elastic component (23). The simulated cylinder (21) is provided with a cavity. The simulated piston (22) is disposed in the cavity and slides along the axis of the cavity. The simulated piston (22) divides the cavity into a first cavity and a second cavity that are sealed to each other. The oil inlet of the pedal simulator (2) is connected to the first cavity. The elastic component (23) is disposed in the second cavity. One end of the elastic component (23) abuts against the simulated piston (22), and the other end abuts against the simulated cylinder (21). The elastic component (23) is elastic along the axial direction of the cavity.

9. The pedal simulation control system according to claim 8, characterized in that, The elastic component (23) includes a second elastic element (231), a third elastic element (232), and a support frame (233). One end of the second elastic element (231) abuts against the simulated piston (22), and the other end of the second elastic element (231) abuts against one end of the support frame (233). The other end of the support frame (233) abuts against one end of the third elastic element (232), and the other end of the third elastic element (232) abuts against the simulated cylinder (21). The second elastic element (231) and the third elastic element (232) are elastic along the axial direction of the cavity, and the elastic coefficients of the second elastic element (231) and the third elastic element (232) are different.

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