Air pedal simulator and vehicle braking system

Abstract

The utility model discloses an air pedal simulator and a vehicle braking system. The simulator comprises an air compressor and a cylinder body, the air compressor is arranged outside the cylinder body; the cylinder body is of a hollow cavity structure; a piston is arranged in the cavity structure; the piston divides the cavity structure into a first cavity and a second cavity; the first cavity is communicated with an air inlet of the cylinder body; an air outlet of the air compressor is communicated with an air inlet of the cylinder body; gas entering the air compressor through the air inlet of the air compressor enters the first cavity through the air outlet of the air compressor; a pedal rod is arranged on the side, close to the second cavity, of the piston. The pedal rod is fixedly connected with the piston; the pedal rod is subjected to treading force to drive the piston to extrude the gas in the first cavity. According to the air pedal simulator, the structure of the air pedal simulator is simplified, the stepping experience of a driver is improved, and environmental pollution is reduced.

Description

Technical Field

[0001] This utility model relates to the field of vehicle braking, and in particular to an air pedal simulator and a vehicle braking system. Background Technology

[0002] With the rapid development of new energy vehicles, automotive automation has received widespread attention from researchers. Drive-by-wire chassis are crucial for the development of automotive automation, as traditional braking technology is increasingly unable to adapt to this trend. The emergence of brake-by-wire technology has decoupled human power from braking force; the force exerted by the driver on the brake pedal is only used to move the brake pedal lever. Providing the driver with a good braking feel has become one of the research focuses.

[0003] Existing technologies mostly use combined spring simulators. This type of pedal simulator has fixed characteristics, making it difficult to achieve a suitable pedal feel, easily generating noise, and causing environmental pollution after hydraulic oil leaks in the pipeline. The force of the spring is linear, and the combined spring can only approximate the nonlinearity of the force curve, and cannot completely eliminate the inflection points on the force curve.

[0004] In addition, some solutions use the magnetic force of permanent magnets to simulate the pedal force. This solution is not practical, as it is difficult to meet the pedal force requirements with magnetic force alone. Moreover, once the permanent magnet is selected, the pedal force is fixed and cannot be adjusted. Utility Model Content

[0005] To address the technical problems in the background art, this utility model provides an air pedal simulator, the simulator comprising an air compressor and a cylinder; the air compressor is disposed outside the cylinder;

[0006] The cylinder body is a hollow cavity structure; a piston is installed inside the cavity structure; the piston divides the cavity structure into a first cavity and a second cavity; the first cavity is connected to the air inlet of the cylinder body; the air outlet of the air compressor is connected to the air inlet of the cylinder body; the gas that enters the air compressor through the air inlet of the air compressor enters the first cavity through the air outlet of the air compressor.

[0007] A pedal rod is provided on the side of the piston near the second cavity; the pedal rod is fixedly connected to the piston; the pedal rod is driven by a stepping force to compress the gas in the first cavity.

[0008] Furthermore, the cavity structure includes a first panel and a second panel arranged opposite to each other along a preset direction; the piston is disposed between the first panel and the second panel; the first cavity is formed between the first panel and the piston; and the second cavity is formed between the piston and the second panel.

[0009] Furthermore, a C-shaped first elastic element is disposed within the first cavity; the first elastic element includes a first elastic unit and a second elastic unit; the second elastic unit is disposed between the first elastic unit and the piston; the first elastic unit includes an elastic panel and a protrusion disposed on one side of the elastic panel; the elastic panel is disposed between the protrusion and the second elastic unit; the elastic panel is fixedly connected to the second elastic unit; the side of the protrusion away from the elastic panel is fixedly connected to the first panel; the gas in the first cavity is compressed by the piston to generate pressure; the first elastic element deforms under the pressure exerted by the gas in the first cavity.

[0010] Furthermore, a second elastic element is provided inside the second cavity; the second elastic element is disposed on the side of the second panel near the piston; the second elastic element is fixedly connected to the second panel.

[0011] Furthermore, the simulator also includes a controller and a pressure relief device; a connector is provided on the outer surface of the cylinder; the connector is in communication with the first cavity; the pressure relief device is detachably connected to the cylinder through the connector; the controller is located outside the cylinder; the pressure relief device is electrically connected to the controller.

[0012] Furthermore, the second panel is provided with a through hole; the pedal rod passes through the through hole and is fixedly connected to the piston.

[0013] Furthermore, the simulator also includes a position sensor; the position sensor is disposed on the pedal lever.

[0014] Furthermore, a sealing component is also provided inside the cylinder; the sealing component is sleeved on the surface of the piston; the sealing component includes multiple sealing units; the multiple sealing units are symmetrically distributed along the central axis of the cylinder.

[0015] Furthermore, the air compressor is electrically connected to the controller; the simulator also includes an air filter; the air filter is disposed outside the cylinder; the air outlet of the air filter is connected to the air inlet of the air compressor; the gas entering the air filter through the air inlet of the air filter enters the air compressor through the air outlet of the air filter.

[0016] This utility model also provides a vehicle braking system, which includes the air pedal simulator as described above.

[0017] The beneficial effects of this utility model are:

[0018] This utility model discloses an air pedal simulator and vehicle braking system, including an air compressor and a cylinder. The air compressor is located outside the cylinder. The cylinder has a hollow cavity structure. A piston is installed inside the cavity structure. The piston divides the cavity structure into a first cavity and a second cavity. The first cavity is connected to the air inlet of the cylinder. The air outlet of the air compressor is connected to the air inlet of the cylinder. Gas entering the air compressor through its inlet enters the first cavity through its outlet. A pedal rod is installed on the side of the piston near the second cavity. The pedal rod is fixedly connected to the piston. The pedal rod, when subjected to a pedal force, drives the piston to compress the gas in the first cavity. This utility model uses gas as the power source for the simulator. Gas from the air compressor enters the cylinder, building up pressure. When the pedal moves, it drives the piston to move. As the piston compresses the cylinder, the internal air pressure increases, thus creating different braking forces. This simplifies the structure of the air pedal simulator, reduces environmental pollution, improves the driver's pedaling experience, facilitates rapid response, and enhances the safety performance of the air pedal simulator. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of an air pedal simulator provided by this utility model;

[0021] Figure 2 This is a schematic diagram of an air pedal simulator provided by this utility model;

[0022] Figure 3 The diagram below is a schematic diagram of the first elastic element of an air pedal simulator provided by this utility model during the deformation process;

[0023] Figure 4 The figure in the middle is a schematic diagram of the pedal force curve of an air pedal simulator provided by this utility model;

[0024] Figure 5 This is a schematic diagram of an air pedal simulator provided by this utility model;

[0025] Figure 6 This is a schematic diagram of the first elastic element of an air pedal simulator provided by this utility model;

[0026] In the figure, the corresponding reference numerals are: 1-air compressor, 2-cylinder, 3-piston, 4-first chamber, 5-second chamber, 6-pedal lever, 7-first panel, 8-second panel, 9-first elastic element, 10-first elastic unit, 11-second elastic unit, 12-second elastic element, 13-controller, 14-pressure relief device, 15-position sensor, 16-sealing component, 17-sealing unit, 18-air filter, 19-air pedal simulator. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," 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. They 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. Since the embodiments disclosed in this utility model can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0029] like Figure 1-6 As shown, this utility model provides an air pedal simulator and a vehicle braking system. The simulator includes an air compressor 1 and a cylinder 2. The air compressor 1 is disposed outside the cylinder 2.

[0030] The cylinder 2 is a hollow cavity structure; a piston 3 is installed inside the cavity structure; the piston 3 divides the cavity structure into a first cavity 4 and a second cavity 5; the first cavity 4 is connected to the air inlet of the cylinder 2; the air outlet of the air compressor 1 is connected to the air inlet of the cylinder 2; the gas that enters the air compressor 1 through the air inlet of the air compressor 1 enters the first cavity 4 through the air outlet of the air compressor 1.

[0031] A pedal rod 6 is provided on the side of the piston 3 near the second chamber 5; the pedal rod 6 is fixedly connected to the piston 3; the pedal rod 6 is driven by the stepping force to compress the gas in the first chamber 4.

[0032] In some embodiments, the piston 3 divides the cavity structure into a first cavity 4 and a second cavity 5. The first cavity 4 is a sealed cavity containing gas to build up pressure. The second cavity 5 is connected to the outside of the cylinder 2. During braking, the piston 3 moves and compresses the gas in the first cavity 4, generating braking force. The second cavity 5 can provide pedal feedback. When pressure needs to be built up, the controller 13 sets a pressure value 'a'. At this time, the pedal lever 6 is in the initial position. If the gas pressure in the first cavity 4 is less than the set value 'a', the controller 13 sends a signal to the air compressor 1. The air compressor 1 then starts working, and air enters the air compressor 1 from the air inlet, is compressed, and then enters the cylinder 2 to build up pressure. During operation, the driver presses the pedal lever 6, which moves downward and pushes the piston 3. The piston 3 moves within the cylinder 2, compressing the gas in the first cavity 4 and generating pressure. The design of piston 3 improves the performance and reliability of the braking system, enhances the driver's pedaling experience, and facilitates pressure management. Simultaneously, the braking system can better control braking force, improving braking effectiveness and safety. Utilizing gas as a power source eliminates the need for a spring within the cylinder, reducing costs and simplifying the structure of the air pedal simulator. Furthermore, compressed air is easy to store and transmit, allowing for rapid response. Compared to hydraulic systems, this reduces costs, improves braking system safety, and minimizes the potential for environmental pollution.

[0033] In this utility model, the cavity structure includes a first panel 7 and a second panel 8 arranged opposite to each other along a preset direction; the piston 3 is disposed between the first panel 7 and the second panel 8; the first cavity 4 is formed between the first panel 7 and the piston 3; and the second cavity 5 is formed between the piston 3 and the second panel 8.

[0034] In some embodiments, such as Figure 2-3 As shown, the preset direction can be the direction perpendicular to the direction when the pedal lever 6 is in the initial position. By setting the piston 3 between the first panel 7 and the second panel 8, the cavity structure is divided into the first cavity 4 and the second cavity 5, which not only provides the driver with a better pedal experience, making the braking process smoother and more controllable, but also makes it easier for the braking system to better control the braking force, thus improving the braking effect and safety.

[0035] In other embodiments, the preset direction can be set according to the actual situation.

[0036] In this invention, a C-shaped first elastic element 9 is provided inside the first cavity 4; the first elastic element 9 includes a first elastic unit 10 and a second elastic unit 11; the second elastic unit 11 is disposed between the first elastic unit 10 and the piston; the first elastic unit 10 includes an elastic panel and a protrusion disposed on one side of the elastic panel; the elastic panel is disposed between the protrusion and the second elastic unit 11; the elastic panel and the second elastic unit 11 are fixedly connected; the side of the protrusion away from the elastic panel is fixedly connected to the first panel 7; the side of the protrusion away from the elastic panel is fixedly connected to the first panel 7; the gas in the first cavity 4 is compressed by the piston 3 to generate pressure; the first elastic element 9 is deformed by the pressure exerted by the gas in the first cavity 4.

[0037] In some embodiments, such as Figure 2-3 As shown, the first elastic element 9 can be a rubber block, and a C-shaped rubber block is placed at the bottom of the cylinder body 2, next to the first panel 7. During installation, the C-shaped rubber block is pressed into the cylinder body 2 using a cylindrical tool. At this time, the C-shaped rubber block deforms, generating friction, and achieves an interference fit with the first panel 7, thus fixing the C-shaped rubber block to the first panel 7. Furthermore, the C-shaped rubber block can be decomposed into two units, such as... Figure 5-6 As shown, the first elastic unit 10 and the second elastic unit 11 are respectively. The first elastic unit includes a protrusion and an elastic panel. The protrusion has an irregular structure, which can be triangular or C-shaped. The second elastic unit can be rectangular, and one side of the irregular shape of the first elastic unit 10 is fixedly connected to the first panel 7. During operation, the pedal lever 6 has three working strokes: compressed air stage, rubber deformation stage, and rubber compression stage. When in the compressed air stage, the force of the pedal comes from the pressure generated by the compression of gas in the first cavity 4. At this time, the pedal force and pedal displacement have a non-linear relationship. When in the rubber deformation stage, the force of the pedal comes from the force generated by the compression of gas in the first cavity 4 and the deformation of the C-shaped rubber block. When in the rubber compression stage, the force of the pedal comes from the force generated by the compression of gas in the first cavity 4 and the compression of the C-shaped rubber block. Figure 4 The figure shown is an ideal curve of the pedal lever force. The ideal gas law is as follows:

[0038]

[0039] Where F is the pedal force; p is the pressure of the gas in the cylinder; s is the cross-sectional area of ​​the piston; nRT is the gas state parameter, which is a constant; and V is the volume of the gas in the cylinder.

[0040] When the simulator is in the compressed air stage, such as Figure 4 In segment AB, at this point, pedal lever 6 has just begun to move. The gas in the first chamber 4 is compressed, the gas volume V in the first chamber 4 decreases, and the gas pressure p in the first chamber 4 increases. At this time, the pedal force F is directly proportional to the pedal displacement, and the pedal force curve is part of a direct proportional function curve. The slope of the pedal force curve at this time is k1. When the simulator is in the rubber deformation stage, such as... Figure 4 In section BC, the gas pressure increases to a certain value, and the C-shaped rubber block begins to deform. During the deformation process, the pedal force further increases, and the slope of the pedal force curve is k2. Since the deformation of the C-shaped rubber block is a gradual process, the pedal force curve gradually becomes steeper in this stage, but there is no obvious inflection point. When the simulator is in the rubber compression stage, such as... Figure 4 In the middle CD segment, the C-shaped rubber block is fully deformed. Further compression requires even greater force, and the pedal force continues to increase until the C-shaped rubber block is fully compressed. At this point, the slope of the pedal force curve is k3, and k3 > k2. Since the compression of the C-shaped rubber block is also a gradual process, the pedal force curve continues to steepen, but still without a clear inflection point. Therefore, placing a C-shaped first elastic element in the cylinder provides a gradually increasing force to the pedal force during the deformation process, resulting in a smoother pedal force curve. Simultaneously, the slope of the pedal force curve also gradually increases, preventing a clear inflection point throughout the process. This significantly improves the pedal force curve, provides a better pedaling experience for the driver, and enhances the reliability and safety of the braking system.

[0041] In other embodiments, the first elastic element 9 may be configured according to actual conditions.

[0042] In this invention, a second elastic element 12 is provided inside the second cavity 5; the second elastic element 12 is disposed on the side of the second panel 8 near the piston 3; the second elastic element 12 is fixedly connected to the second panel 8.

[0043] In some embodiments, such as Figure 1-3As shown, the second elastic element 12 is a return buffer rubber block, which is installed next to the second panel 8. During installation, the return buffer rubber block is press-fitted to the second panel 8, thus achieving a fixed connection between the return buffer rubber block and the second panel 8. During operation, when the driver releases the pedal lever 6, due to the elasticity of the C-shaped rubber block and the pressure of the gas in the first cavity 4, the pedal lever 6 begins to move back to its initial position. The return buffer rubber block absorbs the impact of the pedal lever 6 returning, reducing vibration and noise, allowing the pedal lever 6 to return smoothly to its initial position. The second elastic element helps the pedal lever return smoothly to its initial position during brake release and absorbs the impact of the pedal lever's return, improving the response speed and reliability of the braking system, enhancing driving comfort, reducing wear on the pedal lever and other related components, reducing noise, and extending the service life of the air pedal simulator and braking system.

[0044] In other embodiments, the second elastic element 12 may be configured according to actual conditions.

[0045] In this invention, the simulator further includes a controller 13 and a pressure relief device 14; a connector is provided on the outer surface of the cylinder 2; the connector is connected to the first cavity 4; the pressure relief device 14 is detachably connected to the cylinder 2 through the connector; the controller 13 is located outside the cylinder 2; and the pressure relief device 14 is electrically connected to the controller 13.

[0046] In some embodiments, such as Figure 1-3 As shown, the pressure relief device 14 can be a safety valve. The safety valve and the connecting part can be detachably connected by threading or riveting. When using a threaded connection, the connecting part can be a threaded hole. The threaded part of the safety valve is screwed into the corresponding threaded hole on the cylinder 2 until it is tightened, thus achieving a detachable connection. When disassembly is required, the safety valve can be easily disassembled by rotating it with a wrench or other tools. When using a riveting connection, the safety valve is placed in the designated position on the cylinder 2, and then a riveting tool is used to press the rivet into the connecting part between the safety valve and the cylinder 2, thus achieving a detachable connection. When disassembly is required, the rivet is removed first, and then the safety valve is removed. At the same time, the safety valve is electrically connected to the controller 13. The controller 13 is set with a pressure safety threshold for the gas in the first chamber 4. When the pressure value of the gas in the first chamber 4 is greater than the pressure safety threshold, the controller 13 will control the safety valve to open and release the excess gas. When the pressure value of the gas in the first chamber 4 returns to the safe range, the safety valve closes. The pressure relief device can prevent the air pedal simulator from being damaged by overpressure, improve the reliability and stability of the air pedal simulator, enhance the safety performance of the air pedal simulator, extend the service life of the air pedal simulator, and at the same time, the detachable design makes the pressure relief device easy to maintain, improving the flexibility of the air pedal simulator.

[0047] In other embodiments, the pressure relief device 14 can be configured according to actual conditions.

[0048] In this invention, the second panel 8 is provided with a through hole; the pedal rod 6 passes through the through hole and is fixedly connected to the piston 3.

[0049] In some embodiments, the size and shape of the through hole match the pedal rod 6, which passes through the through hole into the cylinder 2 and is fixedly connected to the piston 3. The through hole allows for a more compact structure of the air pedal simulator, improving its reliability and response speed.

[0050] In this invention, the simulator further includes a position sensor 15; the position sensor 15 is disposed on the pedal lever 6.

[0051] In some embodiments, such as Figure 1-3 As shown, the position sensor 15 can be a pedal lever position sensor, which is electrically connected to the controller 13. The pedal lever position sensor monitors the position of the pedal lever 6 in real time, i.e., the degree to which the driver depresses the pedal lever 6. The pedal lever position sensor converts the position information of the pedal lever 6 into an electrical signal and sends it to the controller 13. The controller 13 receives the signal from the pedal lever position sensor and calculates the braking force required by the driver based on the position information of the pedal lever 6. The controller 13 then controls the actuators of the braking system to apply the corresponding braking force to the wheels based on the calculated braking force. By setting up a position sensor to provide real-time position feedback, the controller can accurately control the braking force, improve the response speed of the braking system, improve driving comfort, and enhance the safety of the braking system.

[0052] In other embodiments, the position sensor 15 may be configured according to actual conditions.

[0053] In this invention, a sealing component 16 is also provided inside the cylinder 2; the sealing component 16 is sleeved on the surface of the piston 3; the sealing component 16 includes a predetermined number of sealing units 17; the plurality of sealing units 17 are symmetrically distributed along the central axis of the cylinder 2.

[0054] In some embodiments, such as Figure 1-3As shown, the sealing component 16 can be a sealing ring, with a preset quantity of two. The sealing unit 17 is a sealing ring disposed on the surface of the piston 3, with one sealing ring at each end of the piston 3. By setting the sealing rings, gas leakage from the gap between the piston 3 and the cylinder wall is prevented, thereby maintaining the pressure inside the cylinder and reducing the direct contact and wear between the piston 3 and the cylinder wall. Therefore, the design of the sealing component 16 can maintain the stability of the gas pressure inside the cylinder, improve the reliability of the air pedal simulator, extend the service life of the air pedal simulator, and improve driving safety.

[0055] In other embodiments, the sealing component 16 may be configured according to the actual situation.

[0056] In this invention, the air compressor 1 is electrically connected to the controller 13; the simulator also includes an air filter 18; the air filter 18 is disposed outside the cylinder 2; the outlet of the air filter 18 is connected to the inlet of the air compressor 1; the gas entering the air filter 18 through the inlet of the air filter 18 enters the air compressor 1 through the outlet of the air filter 18.

[0057] In some embodiments, such as Figure 5 As shown, air enters the air filter 18 through its inlet, where it is filtered to remove dust, particulate matter, and other impurities. The cleaned air then enters the air compressor 1 through its outlet and is compressed to a certain pressure. During operation, when the pressure in the braking system is lower than a preset value, the controller 13 sends a signal to start the air compressor 1. The air compressor 1 then compresses the filtered air to the required system pressure, and the compressed air enters the cylinder 2 through its outlet. When the pressure in the braking system is higher than or equal to the preset value, the controller 13 stops the air compressor 1. The air filter improves air quality, reduces wear and contamination of internal components of the air compressor, reduces noise during operation, and prevents overpressure damage to the air pedal simulator by controlling its start and stop. This extends the lifespan of the air pedal simulator, improves the braking performance of the braking system, and enhances driving safety.

[0058] The working principle of the air pedal simulator and vehicle braking system of this utility model is as follows:

[0059] After the vehicle starts, the braking system initializes, and the controller 13 begins to monitor the pressure within the system. The controller 13 determines whether the pressure within the system is lower than the preset value based on the received pressure data. If the pressure within the system is lower than the preset value, the controller 13 controls the air compressor 1 to start. At this time, the air filter 18 filters the air entering the air compressor 1, removing dust, particulate matter, and other impurities from the air. The air compressor 1 starts working, compressing the filtered clean air to the pressure required by the system. The gas enters the first chamber 4 from the air compressor 1. When the pressure within the system reaches or exceeds the preset target value, the controller 13 sends a signal to the air compressor 1 to stop its operation. When the driver depresses pedal 6, pedal 6 pushes piston 3, which moves within cylinder 2, compressing the gas in the first chamber 4. Position sensor 15 monitors the position of pedal 6 and sends a signal to controller 13. Controller 13 calculates the braking force based on the data from position sensor 15. Based on the calculated braking force, controller 13 controls the actuators of the braking system to apply corresponding braking force to the wheels. The braking system gradually increases or decreases the braking force according to the instructions of controller 13, achieving precise control. When the driver releases the brake pedal, pedal 6 begins to move back to its initial position under the elastic force of the C-shaped first elastic element 9 and the pressure of the gas. The second elastic element 12 absorbs the impact when pedal 6 returns, helping pedal 6 to smoothly return to its initial position. Controller 13 continuously monitors the gas pressure within cylinder 2. If the pressure within cylinder 2 drops below a preset value, controller 13 restarts air compressor 1 to replenish the pressure; if the pressure is sufficient, the current state is maintained.

[0060] In one exemplary embodiment, the present invention also provides a vehicle braking system, including but not limited to the braking system of a motor vehicle. The braking system includes an air pedal simulator 19. By using an air pedal simulator with gas as a power source, automated pressure management and precise braking force control are achieved, providing a good pedaling experience, improving the reliability of the braking system, and extending the service life of the air pedal simulator and the braking system.

[0061] The beneficial effects of this utility model are:

[0062] This utility model discloses an air pedal simulator and a vehicle braking system, comprising an air compressor and a cylinder; the air compressor is disposed outside the cylinder; the cylinder is a hollow cavity structure; a piston is disposed within the cavity structure; the piston divides the cavity structure into a first cavity and a second cavity; the first cavity is connected to the air inlet of the cylinder; the air outlet of the air compressor is connected to the air inlet of the cylinder; gas entering the air compressor through the air inlet enters the first cavity through the air outlet of the air compressor; a pedal rod is disposed on the side of the piston near the second cavity; the pedal rod is fixedly connected to the piston; the pedal rod, when subjected to a pedaling force, drives the piston to compress the gas in the first cavity. This invention utilizes gas as a power source, resulting in a smoother pedal force curve with no obvious inflection points, improving the driver's pedaling experience, enhancing the controllability and safety of the braking system, and achieving rapid response. The use of a C-shaped first elastic element makes the braking process smoother, allowing the driver to more precisely control the braking force, further improving controllability and safety. Simultaneously, the deformation of the C-shaped first elastic element absorbs some vibration, making the braking process quieter and more comfortable. The use of a second elastic element helps the pedal lever quickly return to its original position during brake release, improving the braking system's response speed. This rapid return allows the driver to quickly depress the brake pedal again when needed, enhancing braking performance. The overall efficiency of the braking system is improved, vibration and noise are reduced, driving comfort and experience are enhanced, and the service life of the air pedal simulator is extended. The air filter removes impurities from the air, reducing wear inside the air compressor, extending the service life of the air pedal simulator and braking system, and reducing the possibility of failure. The controller automatically controls the start and stop of the air compressor, ensuring that the pressure in the system is always maintained within the preset range, avoiding overpressure or underpressure, and improving the reliability of the braking system. The position sensor monitors the position of the pedal lever in real time and sends the data to the controller, enabling the controller to accurately calculate the braking force according to the driver's actual braking intention, thereby improving the braking effect.

[0063] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. An air pedal simulator, characterized in that, The simulator includes an air compressor (1) and a cylinder (2); the air compressor (1) is located outside the cylinder (2); The cylinder (2) is a hollow cavity structure; a piston (3) is provided inside the cavity structure; the piston (3) divides the cavity structure into a first cavity (4) and a second cavity (5); the first cavity (4) is connected to the air inlet of the cylinder (2); the air outlet of the air compressor (1) is connected to the air inlet of the cylinder (2); the gas that enters the air compressor (1) through the air inlet of the air compressor (1) enters the first cavity (4) through the air outlet of the air compressor (1); A pedal rod (6) is provided on the side of the piston (3) near the second cavity (5); the pedal rod (6) is fixedly connected to the piston (3); the pedal rod (6) is driven by the stepping force to compress the gas in the first cavity (4) by the piston (3).

2. The simulator according to claim 1, characterized in that, The cavity structure includes a first panel (7) and a second panel (8) arranged opposite to each other along a preset direction; the piston (3) is disposed between the first panel (7) and the second panel (8); the first cavity (4) is formed between the first panel (7) and the piston (3); the second cavity (5) is formed between the piston (3) and the second panel (8).

3. The simulator according to claim 2, characterized in that, A C-shaped first elastic element (9) is provided inside the first cavity (4); the first elastic element (9) includes a first elastic unit (10) and a second elastic unit (11); the second elastic unit (11) is disposed between the first elastic unit (10) and the piston (3); the first elastic unit (10) includes an elastic panel and a protrusion disposed on one side of the elastic panel; the elastic panel is disposed between the protrusion and the second elastic unit (11); the elastic panel is fixedly connected to the second elastic unit (11); the side of the protrusion away from the elastic panel is fixedly connected to the first panel (7); the gas in the first cavity (4) is compressed by the piston (3) to generate pressure; the first elastic element (9) is deformed by the pressure exerted by the gas in the first cavity (4).

4. The simulator according to claim 3, characterized in that, The second cavity (5) is provided with a second elastic element (12); the second elastic element (12) is provided on the side of the second panel (8) near the piston (3); the second elastic element (12) is fixedly connected to the second panel (8).

5. The simulator according to claim 2, characterized in that, The simulator also includes a controller (13) and a pressure relief device (14); a connector is provided on the outer surface of the cylinder (2); the connector is connected to the first cavity (4); the pressure relief device (14) is detachably connected to the cylinder (2) through the connector; the controller (13) is located outside the cylinder (2); the pressure relief device (14) is electrically connected to the controller (13).

6. The simulator according to claim 5, characterized in that, The second panel (8) is provided with a through hole; the pedal rod (6) passes through the through hole and is fixedly connected to the piston (3).

7. The simulator according to claim 6, characterized in that, The simulator also includes a position sensor (15); the position sensor (15) is mounted on the pedal lever (6).

8. The simulator according to claim 1, characterized in that, The cylinder (2) is also provided with a sealing component (16); the sealing component (16) is sleeved on the surface of the piston (3); the sealing component (16) includes a plurality of sealing units (17); the plurality of sealing units (17) are symmetrically distributed along the central axis of the cylinder (2).

9. The simulator according to claim 5, characterized in that, The air compressor (1) is electrically connected to the controller (13); the simulator also includes an air filter (18); the air filter (18) is located outside the cylinder (2); the outlet of the air filter (18) is connected to the inlet of the air compressor (1); the gas entering the air filter (18) through the inlet of the air filter (18) enters the air compressor (1) through the outlet of the air filter (18).

10. A vehicle braking system, characterized in that, The vehicle braking system includes an air pedal simulator as described in any one of claims 1-9.

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