Pedal force simulation device

Abstract

The application relates to the technical field of brake systems, and particularly discloses a pedal force simulation device, a cylinder body, a pipe body and a pedal piston of the pedal force simulation device are arranged to form a sealed cavity, oil in a liquid storage pot enters the sealed cavity through first and second oil inlets, the stroke of the pedal piston can be divided into two sections, in the first section, the pedal piston overcomes the friction between the piston and the piston hole and the reaction force of the oil on the pedal piston; in the second section, the pedal piston seals the second oil inlet, and the oil in the sealed cavity flows from an oil outlet to an oil inlet of a pedal simulator. By controlling the relative positions of the pipe body and the cylinder body and the position of the second oil inlet relative to the pedal piston, the length of the first stroke is adjusted, the device solves the problem that if the relationship between the force and the stroke is adjusted, only internal mechanical parts can be disassembled and replaced to realize the adjustment, the operability is relatively complex, and the same pedal force simulation device cannot realize real-time adjustment of the stroke and the force.

Description

Technical Field

[0001] This invention relates to the field of braking system technology, and more particularly to a pedal force simulation device. 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 and the actual pressure build-up are independent, and their relationship can be adjusted via software. The pedal actuator itself is a pedal force simulation device that simulates the driver's feeling when pressing the pedal, establishing the relationship between pedal travel and pedal force.

[0003] Most pedal force simulation devices 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 to operate. The same pedal force simulation device 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 device to solve the problem that in related technologies, pedal force simulation devices can only realize the 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 device cannot achieve real-time adjustment of travel and force.

[0005] This invention provides a pedal force simulation device, which includes a reservoir, a pedal simulator, and a main cylinder mechanism. The reservoir stores oil. The main cylinder mechanism includes a cylinder body, a tube body, and a pedal piston. The cylinder body has an open piston chamber. The tube body is inserted into the piston chamber through the open chamber and is sealed to the inner wall of the cylinder body. The tube body and the cylinder body have two states: one sliding relative to each other along the axial direction of the piston chamber, and the other relatively fixed. The tube body has a piston hole along the axial direction of the piston chamber. The pedal piston is inserted into the piston hole and is sealed to the hole wall and is slidingly engaged. The cylinder body has a first oil inlet and an oil outlet. The tube body has a second oil inlet. The first oil inlet is connected to the second oil inlet and the reservoir. The oil outlet is connected to the piston hole and the oil inlet of the pedal simulator. The pedal simulator is configured to provide a pedal simulated force to the pedal piston.

[0006] As a preferred technical solution for the pedal force simulation device, the inner wall of the piston chamber is provided with an internal thread, the outer wall of the tube is provided with an external thread, and the inner wall of the piston chamber and the outer wall of the tube are threadedly engaged.

[0007] As a preferred technical solution for the pedal force simulation device, it also includes a drive mechanism that drives the tube to rotate around the axis of the piston chamber.

[0008] As a preferred technical solution for the pedal force simulation device, the driving mechanism includes a driver, a driving wheel, and a driven wheel. The output shaft of the driver passes through the driving wheel and is fixedly connected to it. The outer wall of the tube body is provided with a slide rail protruding along the axial direction of the piston chamber. The inner wall of the shaft hole of the driven wheel is provided with a groove recessed along its axis. The driven wheel is sleeved on the tube body, and the slide rail and the groove are slidably engaged. The driving wheel and the driven wheel are connected in a driving transmission.

[0009] As a preferred technical solution for the pedal force simulation device, the main cylinder mechanism further includes two first sealing rings, both of which are located between the tube body and the cylinder body, and are respectively located on both sides of the first oil inlet hole along the piston cavity axis.

[0010] As a preferred technical solution for the pedal force simulation device, the master cylinder mechanism further includes two second sealing rings, both of which are disposed on the inner wall of the piston hole, and the two second sealing rings are spaced apart on both sides of the second oil inlet hole along the axial direction of the piston cavity.

[0011] As a preferred technical solution for the pedal force simulation device, the main cylinder mechanism further includes a first elastic element, which is disposed in the piston hole, with one end of the first elastic element abutting against the piston and the other end abutting against the cylinder body.

[0012] As a preferred technical solution for the pedal force simulation device, the master cylinder mechanism further includes a pressure sensor and a stroke sensor. The pressure sensor is installed in the pipeline between the oil outlet and the oil inlet of the pedal simulator, and the stroke sensor is used to monitor the displacement of the pedal piston.

[0013] As a preferred technical solution for the pedal force simulation device, the pedal simulator includes a simulation cylinder, a simulation piston, and an elastic component. The simulation cylinder is provided with a cavity, and the simulation piston is disposed in the cavity and slides along the axis of the cavity. The simulation 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. One end of the elastic component abuts against the simulation piston, and the other end abuts against the simulation cylinder. The elastic component is elastic along the axial direction of the cavity.

[0014] As a preferred technical solution for the pedal force simulation device, 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.

[0015] The beneficial effects of this invention are as follows: This invention provides a pedal force simulation device, which includes a reservoir, a pedal simulator, and a main cylinder mechanism. The reservoir stores oil. The main cylinder mechanism includes a cylinder body, a tube body, and a pedal piston. The cylinder body has an open piston chamber. The tube body is inserted into the piston chamber through the open and is sealed to the inner wall of the cylinder body. The tube body and the cylinder body have two states: relative sliding along the axial direction of the piston chamber and relative fixed. The tube body has a piston hole along the axial direction of the piston chamber. The pedal piston is inserted into the piston hole and is sealed to the hole wall and is in a sliding fit. The cylinder body has a first oil inlet and an oil outlet. The tube body has a second oil inlet. The first oil inlet is connected to the second oil inlet and the reservoir. The oil outlet is connected to the piston hole and the oil inlet of the pedal simulator. The pedal simulator is configured to provide pedal simulation force to the pedal piston. The cylinder, pipe, and pedal piston of the pedal force simulation device form a sealed cavity. Oil from the reservoir enters the sealed cavity through the first and second inlets. As the pedal piston moves from the open end to the bottom of the piston cavity, its stroke can be divided into two segments. In the first segment, the second inlet connects to the sealed cavity. During this process, as the pedal piston moves from the open end to the bottom of the piston cavity, the oil in the sealed cavity flows back into the reservoir. In this first segment, the pedal piston overcomes the friction between the piston and the piston hole, as well as the force exerted by the oil on the pedal piston during the oil's return to the reservoir. When the pedal piston continues to move towards the bottom of the piston cavity, and eventually closes the second inlet, the oil in the sealed cavity cannot flow back into the reservoir and instead flows from the outlet to the pedal simulator's inlet. At this point, the pedal simulator, under oil pressure, exerts a reverse force on the pedal piston. By controlling the relative position of the pipe and cylinder along the axial direction of the piston cavity, the position of the second inlet relative to the pedal piston can be controlled, thereby adjusting the length of the first stroke. This device solves the problem that adjusting the relationship between force and stroke can only be achieved by disassembling and replacing internal mechanical parts, which is relatively complicated to operate, and the same pedal force simulation device cannot achieve real-time adjustment of stroke and force. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the pedal force simulation device in an embodiment of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the pedal force simulation device in an embodiment of the present invention. Figure 2 ; Figure 3 This is a graph showing the push rod stroke and master cylinder pressure in an embodiment of the present invention; Figure 4 This is a graph showing the push rod stroke and push rod force in an embodiment of the present invention.

[0017] In the picture: 1. Liquid storage container; 2. Pedal simulator; 21. Simulated cylinder; 22. Simulated piston; 23. Elastic component; 231. Second elastic element; 232. Third elastic element; 233. Support frame; 31. Cylinder block; 311. Piston chamber; 312. First oil inlet; 313. Oil outlet; 32. Pipe body; 321. Piston bore; 322. Second oil inlet; 33. Pedal piston; 34. First sealing ring; 35. Second sealing ring; 36. First elastic element; 37. Pressure sensor; 38. Stroke sensor; 4. Drive mechanism; 41. Driver; 42. Driving wheel; 43. Driven wheel. Detailed Implementation

[0018] 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.

[0019] 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.

[0020] 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 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 communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] like Figure 1 and 2As shown, this embodiment provides a pedal force simulation device, which includes a reservoir 1, a pedal simulator 2, and a main cylinder mechanism. The reservoir 1 stores oil. The main cylinder mechanism includes a cylinder body 31, a tube body 32, and a pedal piston 33. The cylinder body 31 is provided with a piston chamber 311 with an opening. The tube body 32 is inserted into the piston chamber 311 through the opening and is sealed to the inner wall of the cylinder body 31. The tube body 32 and the cylinder body 31 have two states: one where they slide relative to each other along the axial direction of the piston chamber 311, and the other where they are relatively fixed. The cavity 311 is axially provided with a piston hole 321. The pedal piston 33 is inserted into the piston hole 321 and is sealed and slidably engaged with the hole wall of the piston hole 321. The cylinder body 31 is provided with a first oil inlet 312 and an oil outlet 313. The pipe body 32 is provided with a second oil inlet 322. The first oil inlet 312 is connected to the second oil inlet 322 and the liquid reservoir 1 respectively. The oil outlet 313 is connected to the piston hole 321 and the oil inlet of the pedal simulator 2 respectively. The pedal simulator 2 is configured to provide pedal simulation force to the pedal piston 33. The cylinder 31, pipe 32, and pedal piston 33 of the pedal force simulation device form a sealed cavity. Oil in the reservoir 1 enters the sealed cavity through the first oil inlet 312 and the second oil inlet 322. As the pedal piston 33 moves from the open end to the bottom of the piston cavity 311, its stroke can be divided into two segments. The first segment involves the second oil inlet 322 communicating with the sealed cavity. During this process, as the pedal piston 33 moves from the open end to the bottom of the piston cavity 311, the oil in the sealed cavity flows back to the reservoir 1. In the first stage, the pedal piston 33 overcomes the friction between the piston and the piston hole 321, as well as the force exerted by the oil on the pedal piston 33 during the oil return to the reservoir 1. When the pedal piston 33 continues to move towards the bottom of the piston chamber 311, and then closes the second oil inlet 322, the oil in the sealed chamber cannot return to the reservoir 1, and instead flows from the oil outlet 313 to the oil inlet of the pedal simulator 2. At this time, the pedal simulator 2 exerts a reverse force on the pedal piston 33 under the action of oil pressure. By controlling the relative position of the pipe body 32 and the cylinder body 31 along the axial direction of the piston chamber 311, the position of the second oil inlet 322 relative to the pedal piston 33 can be controlled, thereby adjusting the length of the first stage stroke. Therefore, this device solves the problem that if the relationship between force and stroke needs to be adjusted, it can only be achieved by disassembling and replacing internal mechanical parts, which is relatively complex to operate, and the same pedal force simulation device cannot achieve real-time adjustment of stroke and force.

[0023] Optionally, the inner wall of the piston chamber 311 is provided with an internal thread, and the outer wall of the tube body 32 is provided with an external thread, with the inner wall of the piston chamber 311 and the outer wall of the tube body 32 threadedly engaged. In this embodiment, the inner wall of the piston chamber 311 and the outer wall of the tube body 32 are threadedly engaged, and by rotating the tube body 32, the relative position of the cylinder body 31 and the tube body 32 can be adjusted. Specifically, the first oil inlet 312 or the second oil inlet 322 is an oblong hole arranged along the direction of the external thread, so that when the tube body 32 rotates, the first oil inlet 312 and the second oil inlet 322 are always in a connected state.

[0024] Optionally, the pedal force simulation device further includes a drive mechanism 4, which drives the tube body 32 to rotate around the axis of the piston chamber 311. In this embodiment, the drive mechanism 4 can be electrically driven, hydraulically driven, or manually driven, etc.

[0025] Specifically, the drive mechanism 4 includes a driver 41, a driving wheel 42, and a driven wheel 43. The output shaft of the driver 41 passes through and is fixedly connected to the driving wheel 42. A slide rail protrudes from the outer wall of the tube 32 along the axial direction of the piston chamber 311. A groove is recessed from the inner wall of the shaft hole of the driven wheel 43 along its axial direction. The driven wheel 43 is sleeved on the tube 32, and the slide rail and the groove are slidably engaged. The driving wheel 42 and the driven wheel 43 are connected by a drive mechanism. In this embodiment, both the driving wheel 42 and the driven wheel 43 are gears, and they mesh with each other. In other embodiments, the driving wheel 42 and the driven wheel 43 can also be driven by a belt or a chain, etc.

[0026] Specifically, multiple slide rails are provided, which are spaced apart circumferentially along the tube body 32. Multiple slide grooves are provided, which are spaced apart circumferentially along the shaft hole of the driven wheel 43. The multiple slide rails and multiple slide grooves are provided in a one-to-one correspondence.

[0027] Alternatively, the driving wheel 42 and the driven wheel 43 can be replaced with a worm gear transmission. Specifically, the driver 41 drives the worm to rotate, the worm is sleeved on the tube body 32, and the worm slides along the axial direction of the tube body 32 and is relatively fixed to the tube body 32 along the circumferential direction.

[0028] Optionally, the main cylinder mechanism further includes two first sealing rings 34, both located between the tube body 32 and the cylinder body 31, and respectively located on both sides of the first oil inlet hole along the axial direction of the piston chamber 311. In this embodiment, the two first sealing rings 34 can ensure the sealing between the cylinder body 31 and the tube body 32, and prevent the oil in the piston chamber 311 from flowing back to the reservoir 1 through the gap between the cylinder body 31 and the tube body 32. At the same time, they can also prevent the oil in the reservoir 1 from flowing out from the open position through the gap between the cylinder body 31 and the tube body 32.

[0029] Optionally, the master cylinder mechanism further includes two second sealing rings 35, both of which are disposed on the inner wall of the piston bore 321, and are spaced apart along the axial direction of the piston cavity 311 on both sides of the second oil inlet hole. In this embodiment, the two second sealing rings 35 can ensure the sealing between the pedal piston 33 and the tube body 32.

[0030] Optionally, the master cylinder mechanism further includes a first elastic element 36, which is disposed in the piston hole 321. One end of the first elastic element 36 abuts against the piston, and the other end abuts against the cylinder body 31. In this embodiment, the pedal piston 33 is also subjected to the elastic force of the first elastic element 36 when sliding in the first and second stages. When the pedal piston 33 is not subjected to external force, the first elastic element 36 drives the pedal piston 33 to move from the bottom of the piston cavity 311 towards the opening of the piston cavity 311.

[0031] Optionally, the master cylinder mechanism also includes a pressure sensor 37 and a stroke sensor 38. The pressure sensor 37 is installed in the pipeline between the oil outlet 313 and the oil inlet of the pedal simulator 2, and the stroke sensor 38 is used to monitor the displacement of the pedal piston 33. In this embodiment, the pressure sensor 37 and the stroke sensor 38 can be used to intuitively quantify the relationship between the first and second strokes and the force on the pedal piston 33, thereby facilitating the driver's adjustment.

[0032] 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 33, 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 on the pedal piston 33 through the oil.

[0033] 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.

[0034] Working principle like Figure 3 The drive assembly drives the pipe body 32 to rotate, and the pipe body 32 moves within the piston chamber 311 along the axial direction of the piston chamber 311. This allows adjustment of the position of the second oil inlet 322 relative to the pedal piston 33, which in turn allows adjustment of the value of the first stroke S. Figure 1 and Figure 2 The difference in idle travel can be seen when the device is in different axial positions.

[0035] like Figure 3 As shown, the principle of adjusting the relationship between pedal force and pedal travel in this invention is based on the fact that the pedal force and push rod force, as well as the pedal travel and push rod travel, are directly proportional. The following description of the adjustment principle of the relationship between push rod force and push rod travel reflects the adjustability of the pedal force and pedal travel relationship: like Figure 4 As shown, by controlling the position of the tube 32 through the drive assembly, and setting the first stroke of the pedal piston 33 to S, the relationship between the push rod force and the push rod stroke generated after continuous pedal pressing during normal operation is as follows: Figure 4 As shown in the TYPE1 curve.

[0036] Based on the pedal feel requirements, the position of the tube 32 is controlled by the drive assembly, so that the first stroke of the pedal piston 33 is S1 ( Figure 4 (Illustrative image) In this case, the relationship between the push rod force and the push rod stroke is as follows: Figure 4 As shown in the TYPE2 curve.

[0037] Therefore, this device can generate different input push rod strokes and input push rod force relationships, thereby obtaining different pedal feel.

[0038] 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 device, characterized in that, The system includes a reservoir (1), a pedal simulator (2), and a main cylinder mechanism. The reservoir (1) stores oil. The main cylinder mechanism includes a cylinder body (31), a pipe body (32), and a pedal piston (33). The cylinder body (31) has an open piston chamber (311). The pipe body (32) is inserted into the piston chamber (311) through the open and is sealed to the inner wall of the cylinder body (31). The pipe body (32) and the cylinder body (31) have two states: sliding relative to each other along the axial direction of the piston chamber (311) and being relatively fixed. The pipe body (32) has a piston hole (32) along the axial direction of the piston chamber (311). 1) The pedal piston (33) is inserted into the piston hole (321) and is sealed and slidably engaged with the hole wall of the piston hole (321). The cylinder body (31) is provided with a first oil inlet (312) and an oil outlet (313). The pipe body (32) is provided with a second oil inlet (322). The first oil inlet (312) is connected to the second oil inlet (322) and the liquid reservoir (1) respectively. The oil outlet (313) is connected to the piston hole (321) and the oil inlet of the pedal simulator (2) respectively. The pedal simulator (2) is configured to provide pedal simulation force to the pedal piston (33). The inner wall of the piston cavity (311) is provided with an internal thread, and the outer wall of the tube body (32) is provided with an external thread. The inner wall of the piston cavity (311) and the outer wall of the tube body (32) are threadedly engaged.

2. The pedal force simulation device according to claim 1, characterized in that, It also includes a drive mechanism (4) that drives the tube body (32) to rotate about the axis of the piston chamber (311).

3. The pedal force simulation device according to claim 2, characterized in that, The drive mechanism (4) includes a driver (41), a drive wheel (42), and a driven wheel (43). The output shaft of the driver (41) passes through the drive wheel (42) and is fixedly connected to the drive wheel (42). The outer wall of the tube body (32) is provided with a slide rail protruding along the axial direction of the piston chamber (311). The inner wall of the shaft hole of the driven wheel (43) is provided with a groove along its axial direction. The driven wheel (43) is sleeved on the tube body (32), and the slide rail and the groove are slidably engaged. The drive wheel (42) and the driven wheel (43) are connected in a transmission manner.

4. The pedal force simulation device according to any one of claims 1-3, characterized in that, The main cylinder mechanism also includes two first sealing rings (34), both of which are located between the tube body (32) and the cylinder body (31). The two first sealing rings (34) are located on both sides of the first oil inlet (312) along the axial direction of the piston chamber (311).

5. The pedal force simulation device according to any one of claims 1-3, characterized in that, The master cylinder mechanism also includes two second sealing rings (35), both of which are disposed on the inner wall of the piston hole (321), and the two second sealing rings (35) are spaced apart on both sides of the second oil inlet (322) along the axial direction of the piston cavity (311).

6. The pedal force simulation device according to any one of claims 1-3, characterized in that, The master cylinder mechanism also includes a first elastic element (36), which is disposed in the piston hole (321). One end of the first elastic element (36) abuts against the pedal piston (33), and the other end abuts against the cylinder body (31).

7. The pedal force simulation device according to any one of claims 1-3, characterized in that, The master cylinder mechanism also includes a pressure sensor (37) and a stroke sensor (38). The pressure sensor (37) is located in the pipeline between the oil outlet (313) and the oil inlet of the pedal simulator (2). The stroke sensor (38) is used to monitor the displacement of the pedal piston (33).

8. The pedal force simulation device according to any one of claims 1-3, 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 force simulation device 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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