A pedal feel simulator

Abstract

This utility model specifically relates to a pedal feel simulator. The pedal feel simulator includes: a brake pedal, a simulator body, a damping mechanism, and a reservoir. A piston linked to the brake pedal is installed within the simulator body. The damping mechanism divides the simulator body and the piston into a first working chamber and a second working chamber, and restricts the flow direction of the connecting channel between the first and second working chambers. A return spring is installed between the damping mechanism and the piston. The first working chamber is connected to the reservoir via an inlet pipe, and the second working chamber is connected to the reservoir via an outlet pipe, forming a circulating oil circuit. When the brake pedal is depressed, the piston compresses the return spring, and the damping mechanism operates, allowing liquid to flow from the first working chamber through the outlet pipe of the second working chamber into the reservoir, thus creating a damping sensation during pedaling. This pedal feel simulator, by incorporating a damping mechanism, reduces the spring-like sensation of pedal force and improves the quality of pedal force.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle braking technology, specifically relating to a pedal feel simulator. Background Technology

[0002] With the rapid development of electronic control technology and the continuous emergence of new vehicle structural forms, people have put forward higher requirements for vehicle driving safety and operational reliability. The vehicle braking system is one of the most important systems among the eight major vehicle systems, and plays a vital role in ensuring driving safety.

[0003] Currently, braking systems are also constantly evolving towards drive-by-wire. Existing pedal feel simulation devices rely solely on springs for pedal force feedback, resulting in poor quality and impacting the driving experience. Utility Model Content

[0004] The purpose of this invention is to provide a pedal feel simulator that, by setting a damping mechanism, not only relies on the spring for pedal force feedback, but also allows the spring force and the liquid damping force to work together, thereby improving the quality feel of existing pedals.

[0005] To solve the above-mentioned technical problems, this utility model provides a pedal feel simulator, comprising:

[0006] The system comprises a brake pedal, a simulator body, a damping mechanism, and a reservoir. The simulator body contains a piston that is linked to the brake pedal. The damping mechanism divides the simulator body and the piston into a first working chamber and a second working chamber, and restricts the flow direction of the connecting channel between the two chambers. A return spring is installed between the damping mechanism and the piston. The first working chamber is connected to the reservoir via an inlet pipe, and the second working chamber is connected to the reservoir via an outlet pipe, forming a circulating oil circuit. When the brake pedal is depressed, the piston compresses the return spring, activating the damping mechanism to allow fluid to flow from the first working chamber through the outlet pipe of the second working chamber into the reservoir, thus creating a damping sensation during the braking process. By incorporating the damping mechanism, when the driver depresses the brake pedal, fluid flows from the first working chamber through the outlet pipe of the second working chamber into the reservoir, creating a damping sensation during braking. When the driver releases the pedal, the fluid flows back from the reservoir through the second working chamber to the first working chamber, effectively reducing the sticking sensation during pedal return, improving the driver's subjective experience, and thus enhancing the overall system quality.

[0007] Furthermore, the damping mechanism includes: a damper; an overflow valve is provided on the damper; when the brake pedal is depressed, the pressure in the first working chamber is greater than the pressure in the second working chamber, and the overflow valve opens, allowing liquid to flow from the first working chamber through the oil outlet pipe of the second working chamber into the reservoir. When the driver depresses the brake pedal, the brake pedal drives the piston to move from its initial position towards the damper against the reaction force of the return spring. The oil in the first working chamber generates hydraulic pressure under the compression of the piston. The pressure in the first working chamber is greater than the pressure in the second working chamber. Under the action of the pressure difference, the overflow valve on the damper opens, and the oil flows through the oil outlet pipe of the second working chamber into the reservoir; the opening degree of the overflow valve limits the oil flow resistance, creating a damping sensation during the pedal depressing process.

[0008] Furthermore, the damper is equipped with a compensation valve; when the brake pedal is released, the pressure in the second working chamber is greater than the pressure in the first working chamber, and the compensation valve opens, allowing the fluid to flow back from the reservoir through the second working chamber to the first working chamber. When the driver releases the foot, the brake pedal and piston move away from the damper under the action of the return spring; the piston retracts, increasing the volume of the first working chamber and creating a negative pressure within it. At this time, the pressure in the second working chamber is greater than the pressure in the first working chamber, and the compensation valve opens under the pressure difference, allowing the fluid to flow back from the reservoir through the second working chamber to the first working chamber, effectively reducing the sticking sensation when the pedal returns to its original position.

[0009] Furthermore, both the overflow valve and the compensation valve are one-way valves, thereby enabling one-way flow of the oil.

[0010] Furthermore, the relief valve includes: a first screw threadedly connected to the damper, a first valve plate passing through the first screw, and a first spring disposed between the first screw and the first valve plate; the first spring is adapted to press the first valve plate against the side of the damper. This relief valve is a purely mechanical structure with high reliability, requiring no additional solenoid valve or related controller for control.

[0011] Furthermore, the damper has a first oil outlet hole; the first oil outlet hole is symmetrically arranged along the center of the first valve plate, so that the first valve plate is more stable when it is lifted by the oil and will not tilt.

[0012] Furthermore, the compensation valve includes: a second screw threadedly connected to the damper, a second valve plate passing through the second screw, and a second spring disposed between the second screw and the second valve plate; the second spring is adapted to press the second valve plate against the side of the damper. This compensation valve is a purely mechanical structure with high reliability, requiring no additional solenoid valve or related controller for control.

[0013] Furthermore, the damper has a second oil outlet; the second oil outlet is symmetrically arranged along the center of the second valve plate, so that the second valve plate is more stable when it is lifted by the oil and will not tilt.

[0014] Furthermore, a pedal push rod is hinged to the bottom of the brake pedal; the side of the pedal push rod away from the brake pedal is inserted into the piston; the linkage between the brake pedal and the piston is realized through the pedal push rod, and the structure is relatively simple and easy to implement.

[0015] The beneficial effects of this utility model are:

[0016] 1. By setting an overflow valve, a damping force is generated when the driver presses the pedal, which reduces the spring feel of the pedal force, improves the quality of the pedal force, and improves the driver's subjective experience.

[0017] 2. By setting up a compensation valve, the sticking sensation of the pedal returning to its original position is effectively reduced when the driver releases the pedal;

[0018] 3. The pedal feel simulator of this utility model is a purely mechanical structure with high reliability and no need for an external controller.

[0019] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention.

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the pedal feel simulator of this utility model;

[0023] Figure 2 yes Figure 1 A magnified view of a portion of position A in the middle.

[0024] In the picture:

[0025] Brake pedal 1, simulator body 2, piston 21, first working chamber 22, second working chamber 23, return spring 24, damping mechanism 3, damper 31, first oil outlet 311, second oil outlet 312, overflow valve 32, first screw 321, first valve plate 322, first spring 323, compensation valve 33, second screw 331, second valve plate 332, second spring 333, reservoir 4, pedal push rod 5. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] Example 1

[0028] Figure 1 This is a schematic diagram of the pedal feel simulator of this utility model;

[0029] like Figure 1 As shown, this embodiment provides a pedal feel simulator, including: a brake pedal 1, a simulator body 2, a damping mechanism 3, and a reservoir 4; a piston 21 linked to the brake pedal 1 is provided inside the simulator body 2; the damping mechanism 3 divides the simulator body 2 and the piston 21 into a first working chamber 22 and a second working chamber 23, and restricts the flow direction of the connection channel between the first working chamber 22 and the second working chamber 23; a return spring 24 is provided between the damping mechanism 3 and the piston 21; the first working chamber 22 is connected to the reservoir 4 through an oil inlet pipe, and the second working chamber 23 is connected to the reservoir 4 through an oil outlet pipe to form a circulating oil circuit; when the brake pedal 1 is pressed, the piston 21 squeezes the return spring 24, and the damping mechanism 3 works, so that liquid enters the reservoir 4 from the first working chamber 22 through the oil outlet pipe of the second working chamber 23, thereby forming a damping sensation during the pressing process. By setting up a damping mechanism 3, when the driver presses the brake pedal 1, the liquid flows from the first working chamber 22 through the oil outlet pipe of the second working chamber 23 into the reservoir 4, forming a damping sensation during the pressing process; when the driver releases the foot, the liquid flows back from the reservoir 4 through the second working chamber 23 to the first working chamber 22, effectively reducing the sticking sensation when the pedal returns to its original position, improving the driver's subjective experience, and thus enhancing the overall quality of the system.

[0030] Optionally, the damping mechanism 3 includes: a damper 31; an overflow valve 32 is provided on the damper 31; when the brake pedal 1 is pressed, the pressure in the first working chamber 22 is greater than the pressure in the second working chamber 23, and the overflow valve 32 opens, allowing liquid to flow from the first working chamber 22 through the oil outlet pipe of the second working chamber 23 into the reservoir 4. When the driver presses the brake pedal 1, the brake pedal 1 drives the piston 21 to move from the initial position towards the damper 31 against the reaction force of the return spring 24. The oil in the first working chamber 22 generates hydraulic pressure under the compression of the piston 21. The pressure in the first working chamber 22 is greater than the pressure in the second working chamber 23. Under the action of the pressure difference, the overflow valve 32 on the damper 31 opens, and the oil flows through the oil outlet pipe of the second working chamber 23 into the reservoir 4; the opening degree limitation of the overflow valve 32 increases the resistance to oil flow, forming the damping sensation during the pedal pressing process.

[0031] Optionally, a compensation valve 33 is provided on the damper 31. When the brake pedal 1 is released, the pressure in the second working chamber 23 is greater than the pressure in the first working chamber 22, and the compensation valve 33 opens, allowing the fluid to flow back from the reservoir 4 through the second working chamber 23 to the first working chamber 22. When the driver releases the foot, the brake pedal 1 and piston 21 move away from the damper 31 under the action of the return spring 24; the retraction of piston 21 increases the volume of the first working chamber 22, creating a negative pressure in the first working chamber 22. At this time, the pressure in the second working chamber 23 is greater than the pressure in the first working chamber 22, and the compensation valve 33 opens under the action of the pressure difference, allowing the fluid to flow back from the reservoir 4 through the second working chamber 23 to the first working chamber 22, effectively reducing the sticking sensation when the pedal returns to its original position.

[0032] Both the overflow valve 32 and the compensation valve 33 are one-way valves, thereby enabling one-way flow of the oil.

[0033] Optionally, the relief valve 32 includes: a first screw 321 threadedly connected to the damper 31, a first valve plate 322 passing through the first screw 321, and a first spring 323 disposed between the first screw 321 and the first valve plate 322; the first spring 323 is adapted to press the first valve plate 322 against the side of the damper 31. The damper 31 has a first oil outlet 311; the first oil outlet 311 is symmetrically arranged along the center of the first valve plate 322.

[0034] Specifically, when the driver presses the brake pedal 1, the pressure in the first working chamber 22 is greater than the pressure in the second working chamber 23. Under the action of the pressure difference, the oil flows through the first oil outlet 311 and lifts the first valve plate 322. The greater the pressure difference, the greater the height the first valve plate 322 is lifted, and the greater the opening of the relief valve 32. After the pressure difference disappears, the first spring 323 presses the first valve plate 322 against the side of the damper 31, and the relief valve 32 closes. The relief valve 32 is a purely mechanical structure with high reliability and does not require additional solenoid valves or related controllers for control.

[0035] Figure 2 yes Figure 1 A magnified view of a portion of position A in the middle.

[0036] like Figure 2 As shown, the compensation valve 33 includes: a second screw 331 threadedly connected to the damper 31, a second valve plate 332 passing through the second screw 331, and a second spring 333 disposed between the second screw 331 and the second valve plate 332; the second spring 333 is adapted to press the second valve plate 332 against the side of the damper 31. The damper 31 has a second oil outlet 312; the second oil outlet 312 is symmetrically arranged along the center of the second valve plate 332.

[0037] Specifically, when the driver releases the foot, the pressure in the second working chamber 23 is greater than the pressure in the first working chamber 22. Under the action of the pressure difference, the oil flows through the second oil outlet 312 and pushes up the second valve plate 332. The greater the pressure difference, the greater the height the second valve plate 332 is pushed up, and the greater the opening of the compensation valve 33. After the pressure difference disappears, the second spring 333 presses the second valve plate 332 against the side of the damper 31, and the compensation valve 33 closes. The compensation valve 33 is a purely mechanical structure with high reliability and does not require additional solenoid valves or related controllers for control.

[0038] In this embodiment, a pedal push rod 5 is hinged to the bottom of the brake pedal 1; the side of the pedal push rod 5 away from the brake pedal 1 is inserted into the piston 21. The linkage between the brake pedal 1 and the piston 21 is achieved through the pedal push rod 5, which has a relatively simple structure and is easy to implement.

[0039] In this embodiment, both the overflow valve 32 and the compensation valve 33 are mechanical mechanisms, which are more stable in performance than the solenoid valves used in existing pedal simulators and can avoid the occurrence of solenoid valve electrical control failure, thereby improving the reliability of the simulator.

[0040] In summary, the pedal feel simulator of this invention, when the driver depresses the brake pedal 1, the brake pedal 1 drives the piston 21 to move from its initial position towards the damper 31 against the reaction force of the return spring 24. The oil in the first working chamber 22 generates hydraulic pressure under the compression of the piston 21. The pressure in the first working chamber 22 is greater than the pressure in the second working chamber 23. Under the action of the pressure difference, the overflow valve 32 on the damper 31 opens, and the oil enters the reservoir 4 through the oil outlet pipe of the second working chamber 23. Due to the limited opening of the overflow valve 32, the oil flow resistance increases, forming the damping sensation during pedal depressing, thus reducing... The reduced springy feel of the pedal improves the pedal feel quality. When the driver releases the pedal, the brake pedal 1 and piston 21 move away from the damper 31 under the action of the return spring 24. The retraction of piston 21 increases the volume of the first working chamber 22, creating a negative pressure inside the first working chamber 22. At this time, the pressure in the second working chamber 23 is greater than the pressure in the first working chamber 22. The compensation valve 33 opens under the action of the pressure difference, and the oil flows back from the reservoir 4 through the second working chamber 23 to the first working chamber 22, effectively reducing the sticking feeling of the pedal returning to its original position. This pedal feel simulator is a purely mechanical structure with high reliability and does not require an external controller.

[0041] All the devices (parts whose specific structures are not specified) selected in this application are general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0042] In the description of the embodiments of this utility model, 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 utility model based on the specific circumstances.

[0043] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A pedal feel simulator characterized by, include: Brake pedal (1), simulator body (2), damping mechanism (3) and reservoir (4); The simulator body (2) is equipped with a piston (21) that is linked to the brake pedal (1); The damping mechanism (3) divides the simulator body (2) and the piston (21) into a first working chamber (22) and a second working chamber (23), and restricts the flow direction of the connection channel between the first working chamber (22) and the second working chamber (23); A return spring (24) is provided between the damping mechanism (3) and the piston (21); The first working chamber (22) is connected to the reservoir (4) through the oil inlet pipe, and the second working chamber (23) is connected to the reservoir (4) through the oil outlet pipe to form a circulating oil circuit; When the brake pedal (1) is pressed, the piston (21) squeezes the return spring (24), and the damping mechanism (3) works so that the liquid enters the reservoir (4) from the oil outlet pipe of the first working chamber (22) through the second working chamber (23), thereby creating a damping sensation during the pressing process.

2. The pedal feel simulator as described in claim 1, characterized in that, The damping mechanism (3) includes: a damper (31); An overflow valve (32) is provided on the damper (31); When the brake pedal (1) is pressed, the pressure in the first working chamber (22) is greater than the pressure in the second working chamber (23), and the overflow valve (32) is opened so that the liquid enters the reservoir (4) from the first working chamber (22) through the oil outlet pipe of the second working chamber (23).

3. The pedal feel simulator as described in claim 2, characterized in that, The damper (31) is equipped with a compensation valve (33); When the brake pedal (1) is released, the pressure in the second working chamber (23) is greater than the pressure in the first working chamber (22), and the compensation valve (33) opens so that the liquid flows back from the reservoir (4) through the second working chamber (23) to the first working chamber (22).

4. The pedal feel simulator as described in claim 3, characterized in that, Both the overflow valve (32) and the compensation valve (33) are one-way valves.

5. The pedal feel simulator as described in claim 2, characterized in that, The overflow valve (32) includes: a first screw (321) threadedly connected to the damper (31), a first valve plate (322) passing through the first screw (321), and a first spring (323) disposed between the first screw (321) and the first valve plate (322); The first spring (323) is adapted to press the first valve plate (322) against the side of the damper (31).

6. The pedal feel simulator as described in claim 5, characterized in that, The damper (31) has a first oil outlet (311); The first oil outlet (311) is symmetrically arranged along the center of the first valve plate (322).

7. The pedal feel simulator as described in claim 3, characterized in that, The compensation valve (33) includes: a second screw (331) threadedly connected to the damper (31), a second valve plate (332) passing through the second screw (331), and a second spring (333) disposed between the second screw (331) and the second valve plate (332); The second spring (333) is adapted to press the second valve plate (332) against the side of the damper (31).

8. The pedal feel simulator as described in claim 7, characterized in that, The damper (31) has a second oil outlet (312); The second oil outlet (312) is symmetrically arranged along the center of the second valve plate (332).

9. The pedal feel simulator as described in claim 1, characterized in that, A pedal push rod (5) is hinged to the bottom of the brake pedal (1); The pedal push rod (5) is inserted into the piston (21) on the side away from the brake pedal (1).

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