Pedal feeling simulator, system, method, device, vehicle, medium and product

Abstract

The invention discloses a pedal feeling simulator, a brake system, a brake pedal feeling adjusting method, an electronic device, a vehicle, a computer readable storage medium and a computer program product, the pedal feeling simulator comprises a main cavity, an elastic piece is arranged in the main cavity, and the compression deformation quantity of the elastic piece is adjustable. Thus, according to the pedal feeling simulator, the compression deformation quantity of the elastic piece in the pedal feeling simulator can be adjusted, the simulated brake hydraulic pressure provided by the pedal feeling simulator for the brake pedal is correspondingly adjusted, and therefore adjustment of the brake pedal feeling is achieved, and mechanical structures such as a motor, a ball screw and a cam can be prevented from being additionally arranged in the pedal feeling simulator; the weight of the pedal feeling simulator and the cost of the brake system are reduced, and the brake pedal feeling adjusting function is achieved with low hardware cost and a simple system structure.

Description

Technical Field

[0001] The present application relates to the field of braking technology, and in particular to a pedal feel simulator, a braking system, a method for adjusting brake pedal feel, an electronic device, a vehicle, a computer-readable storage medium, and a computer program product. Background Art

[0002] Due to differences in body shape and driving habits among drivers, vehicles need to provide different brake pedal feel for each user to ensure a comfortable driving experience. However, most pedal feel simulators in the prior art typically use mechanical structures such as motors, ball screws, and cams to adjust brake pedal feel, resulting in complex structures, heavy weight, and high cost. Summary of the Invention

[0003] The present application provides a braking system, a method for adjusting brake pedal feel, an electronic device, a vehicle, a computer-readable storage medium, and a computer program product.

[0004] The pedal feel simulator provided in the embodiment of the present application is used in a braking system. The pedal feel simulator includes a main cavity. An elastic member is provided in the main cavity. The compression deformation of the elastic member is adjustable.

[0005] In this way, in the embodiment of the present application, the brake pedal feel can be adjusted by adjusting the compression deformation of the elastic part in the pedal feel simulator and correspondingly adjusting the simulated brake hydraulic pressure provided by the pedal feel simulator to the brake pedal, thereby achieving the adjustment of the brake pedal feel, and avoiding the addition of mechanical structures such as motors, ball screws, cams, etc. in the pedal feel simulator, thereby reducing the weight of the pedal feel simulator and the cost of the braking system, and enabling the brake pedal feel adjustment function to be achieved with lower hardware costs and a simpler system structure.

[0006] In certain embodiments of the present application, the pedal feel simulator includes a first end and a second end, wherein the first end and the second end are adapted to be connected to an oil circuit of the brake system;

[0007] A first piston and a second piston are provided in the main cavity. The first piston is close to the first end, and the second piston is close to the second end. The elastic member is located between the first piston and the second piston.

[0008] Thus, in the embodiment of the present application, a pedal feel simulator can be realized based on the first piston, the second piston, and the elastic member in the main cavity.

[0009] In certain embodiments of the present application, the pedal feel simulator includes a first end and a second end, wherein the first end and the second end are adapted to be connected to an oil circuit of the brake system;

[0010] A first piston and a second piston are provided in the main cavity, the first piston is close to the first end, and the second piston is provided in the middle of the main cavity;

[0011] A sub-cavity is formed between the first piston and the second piston, the second end is communicated with the sub-cavity, and the elastic member is located on a side of the second piston away from the first piston.

[0012] Thus, in the embodiment of the present application, a pedal feel simulator can be realized based on the first piston, the second piston, and the elastic member in the main cavity.

[0013] In certain embodiments of the present application, the stroke of the first piston relative to the second piston is positively correlated with the amount of compression deformation.

[0014] In certain embodiments of the present application, the pedal feel simulator further includes a limiting component for preventing the elastic member from deforming, and the limiting component includes at least one limiting block.

[0015] Thus, in the embodiment of the present application, the excessive deformation of the elastic member can be avoided by the limiting assembly and the limiting block, thereby ensuring the stable operation of the pedal feel simulator.

[0016] An embodiment of the present application provides a braking system, which includes the above-mentioned pedal feel simulator.

[0017] In this way, in the embodiment of the present application, the brake pedal feel can be adjusted by adjusting the compression deformation of the elastic part in the pedal feel simulator and correspondingly adjusting the simulated brake hydraulic pressure provided by the pedal feel simulator to the brake pedal, thereby achieving the adjustment of the brake pedal feel, and avoiding the addition of mechanical structures such as motors, ball screws, cams, etc. in the pedal feel simulator, thereby reducing the weight of the pedal feel simulator and the cost of the braking system, and enabling the brake pedal feel adjustment function to be achieved with lower hardware costs and a simpler system structure.

[0018] In certain embodiments of the present application, the system further comprises a fluid reservoir, a piston cylinder, a master cylinder, and a brake pedal;

[0019] The fluid reservoir is connected to the master cylinder and the pedal feel simulator via a first circuit, the fluid reservoir is connected to the piston cylinder, the piston cylinder is connected to the master cylinder via a second circuit, and the brake pedal and the pedal feel simulator are both connected to the master cylinder.

[0020] In this way, in the embodiment of the present application, the braking system can be implemented through the fluid reservoir, the piston cylinder, the master cylinder, the brake pedal, the first circuit and the second circuit.

[0021] In certain embodiments of the present application, the system further includes a controller, wherein the controller is configured to:

[0022] Obtaining an adjustment instruction for the brake pedal feel, and controlling the opening and closing states of the first circuit and the second circuit according to the adjustment instruction to control the flow of brake fluid between the fluid reservoir, the piston cylinder, the master cylinder, and the pedal feel simulator, so that the pedal feel simulator has a first state and a second state;

[0023] Wherein, when the pedal feel simulator is in the first state, the compressive deformation amount of the elastic member is greater than the compressive deformation amount of the elastic member in the second state.

[0024] In this way, in the embodiment of the present application, the simulated brake hydraulic pressure applied to the brake pedal by the pedal feel simulator can be adjusted by changing the opening and closing states of the first circuit and the second circuit, thereby achieving the adjustment of the brake pedal feel, and avoiding the addition of mechanical structures such as motors, ball screws, cams, etc. in the pedal feel simulator, thereby reducing the weight of the pedal feel simulator and the cost of the braking system, and enabling the brake pedal feel adjustment function to be achieved with lower hardware costs and a simpler system structure.

[0025] In certain embodiments of the present application, the controller is configured to:

[0026] When the adjustment instruction is used to enhance the brake pedal feel, the fluid reservoir is controlled to deliver brake fluid to the piston cylinder, the first circuit is controlled to be in a first open and closed state, and the second circuit is controlled to be conductive, so that the brake fluid in the piston cylinder flows to the master cylinder, and the brake fluid in the master cylinder flows to the pedal feel simulator, so that the pedal feel simulator is in the first state.

[0027] In this way, in the embodiment of the present application, according to the adjustment instruction, the fluid reservoir can be controlled to deliver brake fluid to the brake fluid piston cylinder, and the first circuit can be controlled to be in the first open and closed state, and the second circuit can be controlled to be conductive, so that the brake fluid in the piston cylinder flows into the first piston chamber, and then the hydraulic pressure in the first chamber of the first piston chamber increases, and the brake fluid in the first piston chamber flows into the pedal feel simulator, and the pedal feel simulator increases the simulated brake hydraulic pressure, thereby achieving an enhanced brake pedal feel.

[0028] In certain embodiments of the present application, the master cylinder includes a primary piston and a secondary piston, the brake pedal is connected to the primary piston, one side of the secondary piston is elastically connected to the primary piston to form a first piston chamber, and one side of the secondary piston is elastically connected to the inner surface of the master cylinder to form a second piston chamber. When the first circuit is in a first open-closed state and the second circuit is connected, the brake fluid in the piston cylinder flows into the first piston chamber, and the brake fluid in the first piston chamber flows into the pedal feel simulator.

[0029] In certain embodiments of the present application, the controller is configured to:

[0030] When the adjustment instruction is used to enhance the brake pedal feel and the intra-cavity hydraulic pressure of the second piston chamber is less than the target hydraulic pressure corresponding to the adjustment instruction, the fluid reservoir is controlled to deliver brake fluid to the piston cylinder, and the first circuit is controlled to be in a first open and closed state, and the second circuit is controlled to be conductive, so that the intra-cavity hydraulic pressure increases, the brake fluid in the piston cylinder flows to the master cylinder, and the brake fluid in the master cylinder flows to the pedal feel simulator, so that the pedal feel simulator is in the first state.

[0031] Thus, in an embodiment of the present application, when the adjustment instruction is used to enhance the brake pedal feel and the intra-cavity hydraulic pressure of the second piston chamber is less than the target hydraulic pressure corresponding to the adjustment instruction, the piston cylinder can be driven to deliver brake fluid to the master cylinder to increase the intra-cavity hydraulic pressure.

[0032] In certain embodiments of the present application, the controller is configured to:

[0033] When the adjustment instruction is used to enhance the brake pedal feel and the intra-cavity hydraulic pressure matches the target hydraulic pressure, the first circuit is controlled to be in a second open / close state.

[0034] Thus, in the embodiment of the present application, when the adjustable instruction is used to enhance the brake pedal feel and the intra-cavity hydraulic pressure matches the target hydraulic pressure, the first circuit is controlled to be in the second open / closed state, thereby maintaining the simulated brake hydraulic pressure.

[0035] In certain embodiments of the present application, the first circuit includes a first valve body and a second valve body. The first valve body is used to control the brake fluid flow state of the fluid reservoir relative to the pedal feel simulator and the master cylinder, and the second valve body is used to control the brake fluid flow state of the pedal feel simulator relative to the master cylinder and the fluid reservoir. When the first circuit is in the first open and closed state, the first valve body is closed and the second valve body is connected. When the first circuit is in the second open and closed state, the first valve body is closed and the second valve body is closed.

[0036] In certain embodiments of the present application, the controller is configured to:

[0037] When the adjustment instruction is used to weaken the brake pedal feel, the first circuit is controlled to be in the third open-close state, and the second circuit is controlled to be closed, so that the brake fluid in the pedal feel simulator flows into the master cylinder, and the brake fluid in the master cylinder flows into the fluid reservoir, so that the pedal feel simulator is in the second state.

[0038] In this way, in an embodiment of the present application, when the adjustment instruction is used to weaken the brake pedal feel, the first circuit can be controlled to be in the third open-close state, and the second circuit can be controlled to be closed, so that the brake fluid in the pedal feel simulator flows into the master cylinder, and the brake fluid in the master cylinder flows into the fluid reservoir to put the pedal feel simulator in the second state, thereby achieving a weakening of the brake pedal feel.

[0039] In certain embodiments of the present application, the master cylinder includes a primary piston and a secondary piston, the brake pedal is connected to the primary piston, one side of the secondary piston is elastically connected to the primary piston to form a first piston chamber, and one side of the secondary piston is elastically connected to the inner surface of the master cylinder to form a second piston chamber. When the first circuit is in the third opening and closing state and the second circuit is controlled to be closed, the brake fluid in the pedal feel simulator flows into the first piston chamber, and the brake fluid in the second piston chamber flows into the fluid reservoir.

[0040] In certain embodiments of the present application, the controller is configured to:

[0041] When the adjustment instruction is used to weaken the brake pedal feel and the hydraulic pressure in the cavity is greater than the target hydraulic pressure corresponding to the adjustment instruction, the first circuit is controlled to be in the third open-close state, and the second circuit is controlled to be closed, so that the brake fluid in the pedal feel simulator flows into the master cylinder, and the brake fluid in the master cylinder flows into the fluid reservoir, so that the pedal feel simulator is in the second state.

[0042] In this way, in an embodiment of the present application, when the adjustment instruction is used to weaken the brake pedal feel and the hydraulic pressure in the cavity is greater than the target hydraulic pressure corresponding to the adjustment instruction, the first circuit can be controlled to be in the third open and close state, and the second circuit can be controlled to be closed, so that the brake fluid in the pedal feel simulator flows into the master cylinder, and the brake fluid in the master cylinder flows into the fluid reservoir, so that the pedal feel simulator is in the second state.

[0043] In certain embodiments of the present application, the controller is configured to:

[0044] When the adjustment instruction is used to weaken the brake pedal feel and the hydraulic pressure in the cavity is greater than the target hydraulic pressure, the first circuit is controlled to switch between the third open and close state and the fourth open and close state, and the second circuit is controlled to be closed, so that the brake fluid in the first piston cavity flows into the fluid reservoir, so as to reduce the hydraulic pressure in the cavity until it is the same as the target hydraulic pressure and put the pedal feel simulator in the second state.

[0045] In this way, in an embodiment of the present application, when the adjustment instruction is used to weaken the brake pedal feel and the hydraulic pressure in the cavity is greater than the target hydraulic pressure, the first circuit can be controlled to switch between the third open and closed state and the fourth open and closed state, and the second circuit can be controlled to close, so that the brake fluid in the first piston cavity flows into the reservoir, so as to reduce the hydraulic pressure in the cavity until it is the same as the target hydraulic pressure and put the pedal feel simulator in the second state.

[0046] In certain embodiments of the present application, the first circuit includes a first valve body and a second valve body. The first valve body is used to control the brake fluid flow state of the fluid reservoir relative to the pedal feel simulator and the master cylinder, and the second valve body is used to control the brake fluid flow state of the pedal feel simulator relative to the master cylinder and the fluid reservoir. When the first circuit is in the third opening and closing state, the first valve body is closed and the second valve body is connected. When the first circuit is in the fourth opening and closing state, the first valve body is connected and the second valve body is closed.

[0047] In certain embodiments of the present application, the controller is configured to:

[0048] When the change rate parameter of the brake pedal is greater than or equal to a preset rate threshold, the first circuit is controlled to be turned on and the second circuit is controlled to be turned off, so that the brake fluid in the pedal feel simulator flows into the fluid reservoir, so that the pedal feel simulator is in the second state.

[0049] In this way, in an embodiment of the present application, when the change rate parameter of the brake pedal is greater than or equal to a preset rate threshold, the first circuit can be controlled to be turned on and the second circuit can be controlled to be turned off, so that the brake fluid in the pedal feel simulator flows into the reservoir, and the pedal feel simulator is placed in the second state, thereby achieving a rapid weakening of the brake pedal feel.

[0050] In certain embodiments of the present application, the controller is configured as follows:

[0051] When the opening of the brake pedal is less than or equal to a preset opening, the opening and closing states of the first circuit and the second circuit are controlled according to the adjustment instruction to control the flow of brake fluid between the fluid reservoir, the piston cylinder, the master cylinder and the pedal feel simulator, so that the pedal feel simulator is in the first state or the second state.

[0052] In this way, in an embodiment of the present application, when the opening of the brake pedal is less than or equal to the preset opening, the opening and closing states of the first valve body and the second valve body can be controlled according to the adjustment instruction, so that the adjustment of the brake pedal feel can be carried out safely.

[0053] An embodiment of the present application provides a method for adjusting brake pedal feel, which is applied to the above-mentioned braking system. The method includes:

[0054] The brake system is controlled so that the pedal feel simulator has a first state and a second state, wherein the compressive deformation amount of the elastic member in the first state is greater than the compressive deformation amount of the elastic member in the second state.

[0055] In certain embodiments of the present application, an adjustment instruction for the brake pedal feel is obtained, and the flow of brake fluid in the brake system is controlled according to the adjustment instruction, so that the pedal feel simulator has a first state and a second state.

[0056] An embodiment of the present application provides an electronic device including a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the above-mentioned method for adjusting the brake pedal feel is implemented.

[0057] An embodiment of the present application provides a vehicle including the above-mentioned braking system, or including the above-mentioned electronic device.

[0058] An embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by one or more processors, the above-mentioned method for adjusting the brake pedal feel is implemented.

[0059] An embodiment of the present application provides a computer program product, including a computer program / instruction, which implements the above-mentioned method for adjusting the brake pedal feel when executed by a processor.

[0060] The braking system, brake pedal feel adjustment method, electronic device, vehicle, computer-readable storage medium and computer program product provided in the embodiments of the present application can adjust the simulated brake hydraulic pressure applied to the brake pedal by the pedal feel simulator by changing the opening and closing states of the first valve body and the second valve body, thereby achieving adjustment of the brake pedal feel, and can avoid adding mechanical structures such as motors, ball screws, cams, etc. to the pedal feel simulator, thereby reducing the weight of the pedal feel simulator and the cost of the braking system, so that the brake pedal feel adjustment function can be achieved with lower hardware cost and a simpler system structure.

[0061] The brake pedal feel adjustment method, electronic device, vehicle, computer-readable storage medium and computer program product provided in the embodiments of the present application can adjust the brake pedal feel by adjusting the compression deformation of the elastic part in the pedal feel simulator and correspondingly adjusting the simulated brake hydraulic pressure provided by the pedal feel simulator to the brake pedal, thereby achieving the adjustment of the brake pedal feel, and avoiding the addition of mechanical structures such as motors, ball screws, cams, etc. in the pedal feel simulator, thereby reducing the weight of the pedal feel simulator and the cost of the braking system, so that the brake pedal feel adjustment function can be achieved with lower hardware cost and simpler system structure.

[0062] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0064] Figure 1 A schematic diagram of a pedal feel simulator in certain embodiments of the present application;

[0065] Figure 2 A schematic diagram of a pedal feel simulator in certain embodiments of the present application;

[0066] Figure 3 A schematic diagram of a braking system in some embodiments of the present application;

[0067] Figure 4 This is a flow chart of a method for adjusting brake pedal feel in certain embodiments of the present application;

[0068] Figure 5 This is a schematic diagram of an application scenario in some embodiments of the present application;

[0069] Figure 6 This is a schematic diagram of an application scenario in some embodiments of the present application;

[0070] Figure 7 This is a schematic diagram of an application scenario in some embodiments of the present application;

[0071] Figure 8 This is a schematic diagram of an application scenario in certain embodiments of the present application. DETAILED DESCRIPTION

[0072] The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent 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 embodiments of the present application, and should not be understood as limiting the embodiments of the present application.

[0073] Drivers vary in gender, body shape, seat adjustment habits, and other factors. Consequently, each driver has unique requirements for brake pedal feel (also known as brake pedal feel). To ensure a satisfying driving experience, vehicles must provide a diverse brake pedal feel for each user. This includes providing a specific brake pedal feel for different driving surfaces (e.g., paved roads, off-road conditions) and driving modes (e.g., sport mode, economy mode). This allows drivers to perceive the current road surface conditions and drive the vehicle with confidence.

[0074] At the same time, with the development of electronic mechanical brake system (hydraulic wire brake system), the demand for continuous and adjustable brake pedal feel is becoming more and more urgent. How to design a pedal feel simulator with simple structure, light weight and low cost has become one of the current research hotspots.

[0075] In related technologies, most pedal feel simulators achieve adjustable brake pedal feel through mechanical transmission. Brake pedal feel adjustment based on mechanical transmission is often achieved through mechanical structures such as motors, ball screws, and cams. However, these mechanically-transmitted continuously adjustable brake pedal feel solutions suffer from complex structures, heavy weight, and high costs, making them difficult to commercialize and implement.

[0076] In other related technologies, a solution is proposed to adjust the stiffness of the pedal feel simulator through pressure or electromagnetic structure adjustment, thereby achieving continuously adjustable brake pedal feel. Although this solution can better achieve continuously adjustable brake pedal feel, it still has the disadvantage of complex structure. Therefore, only by optimizing the structure as much as possible and reducing new components can the continuously adjustable brake pedal feel function be better and faster implemented.

[0077] Based on the above problems you may encounter, please refer to Figure 1 An embodiment of the present application provides a pedal feel simulator 100 for a braking system. The pedal feel simulator 100 includes a main cavity 101 , in which an elastic member 102 is provided. The compression deformation of the elastic member 102 is adjustable.

[0078] In one example, the elastic member 102 is composed of a plurality of spring sheets.

[0079] In one example, the pedal feel simulator can simulate the brake pedal travel by compressing the elastic member 102 and provide a reaction force (or simulated brake fluid pressure) to the brake pedal, i.e., the brake pedal feel. Therefore, in the embodiments of the present application, the brake pedal feel can be adjusted by varying the compressive deformation of the elastic member 102.

[0080] In this way, in the embodiment of the present application, the compression deformation of the elastic part 102 in the pedal feel simulator 100 can be adjusted to correspond to the simulated brake hydraulic pressure provided by the pedal feel simulator 100 to the brake pedal, thereby achieving the adjustment of the brake pedal feel, and avoiding the addition of mechanical structures such as motors, ball screws, cams, etc. in the pedal feel simulator 100, thereby reducing the weight of the pedal feel simulator 100 and the cost of the braking system, so that the brake pedal feel adjustment function can be achieved with lower hardware cost and simpler system structure.

[0081] See also Figure 1 In certain embodiments of the present application, the pedal feel simulator 100 includes a first end and a second end, the first end and the second end are suitable for connecting to the oil circuit of the braking system, and a first piston 103 and a second piston 104 are provided in the main cavity 101, the first piston 103 is close to the first end, the second piston 104 is close to the second end, and the elastic member 102 is located between the first piston 103 and the second piston 104.

[0082] Specifically, if Figure 1 As shown, in the embodiment of the present application, during the pedal feel enhancement adjustment process, the brake fluid in the brake system can enter the pedal feel simulator 100 along the first oil path 105 so that the brake fluid near the first end (ie Figure 1 The first piston 103 at the bottom end of the pedal feel simulator moves upward to compress the elastic member 102 so that the first piston 103 near the second end (ie Figure 1 Therefore, after the pedal feel adjustment process is completed, when the user steps on the brake pedal to drive the second piston 104 to move downward, more obvious resistance can be felt. In other words, the pedal feel fed back by the second piston 104 to the brake pedal is stronger.

[0083] In contrast, during the pedal feel weakening adjustment process, the brake fluid in the pedal feel simulator 100 may flow out along the first oil path 105 so that the brake fluid near the first end (ie Figure 1 The first piston 103 at the bottom end of the pedal feel simulator 100 moves downward to release the elastic member 102, so that the first piston 103 near the second end (ie Figure 1The difficulty of the second piston 104 (at the top of the middle pedal feel simulator 100) moving downward to compress the elastic member 102 is reduced. Therefore, after the pedal feel adjustment process is completed, when the user steps on the brake pedal to drive the second piston 104 to move downward, it is difficult to feel the resistance, or in other words, the pedal feel fed back by the second piston 104 to the brake pedal is weaker.

[0084] In one example, the stroke of the first piston 103 relative to the second piston 104 is positively correlated with the amount of compression deformation.

[0085] Thus, in the embodiment of the present application, the pedal feel simulator 100 can be realized based on the first piston 103 , the second piston 104 , and the elastic member 102 in the main cavity 101 .

[0086] See also Figure 2 In certain embodiments of the present application, the pedal feel simulator 100 includes a first end and a second end, the first end and the second end are suitable for connecting to the oil circuit of the braking system, and a first piston 103 and a second piston 104 are provided in the main cavity 101, the first piston 103 is close to the first end, and the second piston 104 is arranged in the middle of the main cavity 101, wherein a sub-cavity 106 is formed between the first piston 103 and the second piston 104, the second end is connected to the sub-cavity 106, and the elastic member 102 is located on the side of the second piston 104 away from the first piston 103.

[0087] Specifically, if Figure 2 As shown, in the embodiment of the present application, during the pedal feel enhancement adjustment process, the brake fluid in the brake system can enter the pedal feel simulator 100 along the first oil path 105 near the second end (i.e. Figure 2 The left end of the pedal feel simulator 100) is placed in the sub-cavity 106 so that the second piston 104 moves downward to compress the elastic member 102 ... Figure 2 Therefore, after the pedal feel adjustment process is completed, when the user steps on the brake pedal to drive the first piston 103 to move downward, more obvious resistance can be felt, or in other words, the pedal feel fed back by the first piston 103 to the brake pedal is stronger.

[0088] In contrast, during the process of adjusting the weakening of the pedal feel, the brake fluid in the sub-cavity 106 can flow out along the first oil path 105, so that the second piston 104 moves upward to release the elastic member 102, so that the brake fluid near the first end (i.e. Figure 2The difficulty of the first piston 103 (at the top of the pedal feel simulator 100) moving downward to compress the elastic member 102 is reduced. Therefore, after the pedal feel adjustment process is completed, when the user steps on the brake pedal to drive the first piston 103 to move downward, the resistance can be hardly felt. In other words, the pedal feel fed back to the brake pedal by the first piston 103 is weaker.

[0089] In one example, the stroke of the first piston 103 relative to the second piston 104 is positively correlated with the amount of compression deformation.

[0090] Thus, in the embodiment of the present application, the pedal feel simulator 100 can be realized based on the first piston 103 , the second piston 104 , and the elastic member 102 in the main cavity 101 .

[0091] Please also refer to Figure 1 and Figure 2 In certain embodiments of the present application, the pedal feel simulator 100 further includes a limiting component for preventing the elastic member 102 from deforming, and the limiting component includes at least one limiting block.

[0092] Specifically, if Figure 1 or Figure 2 As shown in the embodiment of the present application, a first limit block 107 and a second limit block 108 are provided in the pedal feel simulator 100. It is understandable that Figure 1 In the example shown, when the first piston 103 applies force to the elastic member 102 and the main body of the first piston 103 gradually approaches the second piston 104, due to the presence of the first limit block 107 and the second limit block 108, the first piston 103 cannot be completely tightly attached to the second piston 104, so the elastic member 102 in the pedal feel simulator 100 fails to completely contract, thereby avoiding the situation where the elastic member 102 in the pedal feel simulator 100 is damaged due to excessive compression.

[0093] Similarly, in Figure 2 In the example shown, when the second piston 104 applies force to the elastic member 102 and the second piston 104 body gradually approaches the bottom end of the pedal feel simulator 100, due to the presence of the first limit block 107 and the second limit block 108, the second piston 104 cannot be completely tightly attached to the bottom end of the pedal feel simulator 100, so the elastic member 102 in the pedal feel simulator 100 fails to fully contract, thereby avoiding the situation where the elastic member 102 in the pedal feel simulator 100 is damaged due to excessive compression.

[0094] Thus, in the embodiment of the present application, the limiting assembly and the limiting block can be used to prevent excessive deformation of the elastic member 102 , thereby ensuring the stable operation of the pedal feel simulator 100 .

[0095] Corresponding to the above-mentioned pedal feel simulator 100 , an embodiment of the present application further provides a braking system, which includes the above-mentioned pedal feel simulator 100 .

[0096] Corresponding to the above-mentioned braking system, an embodiment of the present application further provides a method for adjusting brake pedal feel, which is applied to the above-mentioned braking system. The method further comprises:

[0097] The brake system is controlled so that the pedal feel simulator has a first state and a second state, wherein the compression deformation amount of the elastic member in the first state of the pedal feel simulator is greater than the compression deformation amount of the elastic member in the second state.

[0098] In this way, in the embodiment of the present application, the brake pedal feel can be adjusted by adjusting the compression deformation of the elastic part in the pedal feel simulator 100, and the simulated brake hydraulic pressure provided by the pedal feel simulator 100 to the brake pedal can be adjusted accordingly, thereby achieving the adjustment of the brake pedal feel, and avoiding the addition of mechanical structures such as motors, ball screws, cams, etc. in the pedal feel simulator 100, thereby reducing the weight of the pedal feel simulator 100 and the cost of the braking system, so that the brake pedal feel adjustment function can be achieved with lower hardware cost and simpler system structure.

[0099] Please participate Figure 3 In certain embodiments of the present application, the braking system further includes a fluid reservoir 210, a piston cylinder 220, a master cylinder 230, and a brake pedal 240. The fluid reservoir 210 is connected to the master cylinder 230 and the pedal feel simulator 100 via a first circuit 250. The fluid reservoir 210 is connected to the piston cylinder 220. The piston cylinder 220 is connected to the master cylinder 230 via a second circuit 260. The brake pedal 240 and the pedal feel simulator 100 are both connected to the master cylinder 230.

[0100] It can be understood that in the embodiment of the present application, the brake fluid between the fluid reservoir 210, the master cylinder 230, the pedal feel simulator 100, and the piston cylinder 220 can be circulated through the first circuit 250 and the second circuit 260, thereby realizing hydraulic control within the braking system.

[0101] Thus, in the embodiment of the present application, the braking system can be implemented through the fluid reservoir 210 , the piston cylinder 220 , the master cylinder 230 , the brake pedal 240 , the first circuit 250 and the second circuit 260 .

[0102] In certain embodiments of the present application, the system further includes a controller, which is configured to:

[0103] Obtaining an adjustment instruction for the brake pedal feel, and controlling the opening and closing states of the first circuit 250 and the second circuit 260 according to the adjustment instruction to control the flow of brake fluid between the fluid reservoir 210, the piston cylinder 220, the master cylinder 230, and the pedal feel simulator 100, so that the pedal feel simulator 100 has a first state and a second state;

[0104] Wherein, the compressive deformation amount of the elastic member of the pedal feel simulator 100 in the first state is greater than the compressive deformation amount of the elastic member in the second state.

[0105] See also Figure 4 , the adjustment method provided in the embodiment of the present application also includes:

[0106] 31: Get the adjustment instruction for the brake pedal feel;

[0107] 32: Control the flow of brake fluid in the braking system according to the adjustment instruction, so that the pedal feel simulator 100 has a first state and a second state, wherein the compression deformation amount of the elastic member 102 of the pedal feel simulator 100 in the first state is greater than the compression deformation amount of the elastic member 102 in the second state.

[0108] The present application also provides an electronic device comprising a memory and a processor. The brake pedal feel adjustment method of the present application can be implemented by the electronic device of the present application. Specifically, the memory stores a computer program, and the processor is configured to obtain adjustment instructions for the brake pedal feel and control the flow of brake fluid in the brake system according to the adjustment instructions, so that the pedal feel simulator 100 has a first state and a second state, wherein the compression deformation of the elastic member 102 of the pedal feel simulator 100 in the first state is greater than the compression deformation of the elastic member 102 in the second state.

[0109] Specifically, in an embodiment of the present application, the vehicle can control the opening and closing states of the first circuit 250 and the second circuit 260 in the braking system based on a controller (not shown in the figure) in the braking system, thereby adjusting the flow of brake fluid between the fluid reservoir 210, the piston cylinder 220, the master cylinder 230 and the pedal feel simulator 100, thereby changing the current state of the pedal feel simulator 100, thereby changing the simulated brake hydraulic pressure applied to the brake pedal 240, or in other words, changing the brake pedal feel fed back to the user by the pedal feel simulator 100.

[0110] In one example, when the pedal feel simulator 100 is in the first state, the compressive deformation amount of the elastic member 102 is greater than the compressive deformation amount of the elastic member 102 in the second state.

[0111] Furthermore, the greater the compressive deformation of the elastic member 102 within the pedal feel simulator 100, the higher the simulated brake fluid pressure applied to the brake pedal 240 by the pedal feel simulator 100, and the stronger the brake pedal feel fed back to the user via the brake pedal 240. Therefore, in one example, when the pedal feel simulator 100 is in the first state, the simulated brake fluid pressure applied to the brake pedal 240 is higher, while when the pedal feel simulator 100 is in the second state, the simulated brake fluid pressure applied to the brake pedal 240 is lower. Furthermore, when the pedal feel simulator 100 is in the first state, the brake pedal feel fed back to the user via the brake pedal 240 is stronger, while when the pedal feel simulator 100 is in the first state, the brake pedal feel fed back to the user via the brake pedal 240 is weaker.

[0112] In such Figure 1 In the illustrated example, after the pedal feel simulator 100 receives brake fluid from an external source (e.g., the master cylinder 230), the inflow of brake fluid compresses the elastic member, moving it closer to the second piston 104. It will be appreciated that as the pedal feel simulator 100 receives more brake fluid, the force with which the first piston 103 compresses the elastic member increases, the elastic member becomes more difficult to deform, and the first stroke of the first piston 103 relative to the second piston 104 decreases. This results in a higher simulated brake fluid pressure applied to the brake pedal 240 by the pedal feel simulator 100, resulting in a stronger brake pedal feel.

[0113] Furthermore, after the pedal feel simulator 100 delivers brake fluid to the outside (e.g., the master cylinder 230), the force applied by the first piston 103 to the elastic member due to the outflow of brake fluid decreases, causing the elastic member to relax and move away from the second piston 104. It is understood that as more brake fluid is delivered by the pedal feel simulator 100, the elastic member relaxes more, the elastic member becomes less prone to deformation, and the first stroke of the first piston 103 relative to the second piston 104 increases. This results in a lower simulated brake fluid pressure applied to the brake pedal 240 by the pedal feel simulator 100, resulting in a weaker brake pedal feel.

[0114] In addition, in Figure 1 In the example shown, the pedal feel simulator 100 can receive brake fluid from the outside through the first oil passage 108 , or can deliver brake fluid to the outside through the first oil passage 108 .

[0115] In this way, in the embodiment of the present application, the simulated brake hydraulic pressure applied to the brake pedal 240 by the pedal feel simulator 100 can be adjusted by changing the opening and closing states of the first circuit 250 and the second circuit 260, thereby achieving the adjustment of the brake pedal feel, and avoiding the addition of mechanical structures such as motors, ball screws, cams, etc. in the pedal feel simulator 100, thereby reducing the weight of the pedal feel simulator 100 and the cost of the braking system, so that the brake pedal feel adjustment function can be achieved with lower hardware costs and a simpler system structure.

[0116] Furthermore, this application eliminates the need for complex mechanical adjustment mechanisms to achieve pedal feel adjustment. Continuously adjustable pedal feel is achieved simply by adding a valve body, resulting in a simple structure, light weight, and low cost. Furthermore, this application enables continuous adjustment of pedal feel within a certain range to enhance driver comfort. Furthermore, since no major modifications are made to the pedal feel simulator 100, the number of vehicle pedal feel simulators 100 can be reduced, improving the versatility of electronic brake controllers.

[0117] Please refer again Figure 3 In certain embodiments of the present application, the master cylinder 230 includes a primary piston 231 and a secondary piston 232, the brake pedal 240 is connected to the primary piston 231, one side of the secondary piston 232 is connected to the primary piston 231 through an elastic member to form a first piston chamber, and one side of the secondary piston 232 is connected to the inner surface of the master cylinder 230 through an elastic member to form a second piston chamber.

[0118] Specifically, if Figure 3 As shown, the master cylinder 230 includes two pistons, namely the main piston 231 and the secondary piston 232. The main piston 231 and the secondary piston 232 are connected by an elastic member to form a cavity for storing brake fluid, namely the first piston cavity. The secondary piston 232 and the inner surface of the master cylinder 230 are connected by another elastic member to form another cavity for storing brake fluid, namely the second piston cavity.

[0119] It can be understood that after the outside world (such as the fluid reservoir 210) gradually delivers brake fluid to the first piston chamber, the main piston 231 and the secondary piston 232 gradually move away from each other. The greater the stroke of the main piston 231 relative to the secondary piston 232, the greater the degree of relaxation of the elastic member between the main piston 231 and the secondary piston 232, the higher the degree of compression of the elastic member between the secondary piston 232 and the inner surface of the master cylinder 230, and the higher the hydraulic pressure of the second piston chamber.

[0120] Conversely, after the first piston chamber gradually delivers brake fluid to the outside world (such as the fluid reservoir 210), the main piston 231 and the secondary piston 232 gradually approach each other. The smaller the stroke of the main piston 231 relative to the secondary piston 232, the compression degree of the elastic part between the main piston 231 and the secondary piston 232 gradually decreases and maintains a steady state. The lower the compression degree of the elastic part between the secondary piston 232 and the inner surface of the master cylinder 230, the lower the hydraulic pressure in the second piston chamber.

[0121] In certain embodiments of the present application, when the adjustment instruction is used to enhance the brake pedal feel, the fluid reservoir is controlled to deliver brake fluid to the piston cylinder, and the first circuit 250 is controlled to be in a first open and closed state, and the second circuit 260 is controlled to be conductive, so that the brake fluid in the piston cylinder flows to the master cylinder, and the brake fluid in the master cylinder flows to the pedal feel simulator 100, so that the pedal feel simulator 100 is in the first state.

[0122] In the adjustment method of the embodiment of the present application, step 32 includes:

[0123] When the adjustment instruction is used to enhance the brake pedal feel, the fluid reservoir is controlled to deliver brake fluid to the piston cylinder, and the first circuit 250 is controlled to be in the first open and closed state, and the second circuit 260 is controlled to be connected, so that the brake fluid in the piston cylinder flows to the master cylinder, and the brake fluid in the master cylinder flows to the pedal feel simulator 100, so that the pedal feel simulator 100 is in the first state.

[0124] The processor of the embodiment of the present application is also used to control the fluid reservoir to deliver brake fluid to the piston cylinder, control the first circuit 250 to be in a first open and closed state, and control the second circuit 260 to be connected, so that the brake fluid in the piston cylinder flows to the master cylinder, and the brake fluid in the master cylinder flows to the pedal feel simulator 100, so that the pedal feel simulator 100 is in the first state.

[0125] To more clearly illustrate the implementation of this application, please refer to Figure 5 , Figure 5 This is a schematic diagram of an application scenario in certain embodiments of the present application. Figure 5 The arrow symbol in the figure indicates the flow direction of the brake fluid.

[0126] like Figure 5 As shown, after the user triggers an adjustment command for enhancing brake pedal feel through hardware or software such as the central control screen, knob, or voice control function, the controller can first control fluid reservoir 210 to deliver brake fluid to piston cylinder 220. In one example, the controller can drive motor 271 to pump brake fluid from fluid reservoir 210 into piston cylinder 220.

[0127] At the same time, the first circuit 250 is controlled to be in the first open / closed state, and the second circuit 260 is controlled to be conductive, so that the brake fluid enters the master cylinder 230. Furthermore, the brake fluid in the master cylinder 230 enters the pedal feel simulator 100, and the first piston 103 in the pedal feel simulator 100 moves upward to compress the elastic member 102 in the pedal feel simulator 100. The initial compression deformation of the elastic member in the pedal feel simulator 100 increases, causing the simulated brake fluid pressure applied by the pedal feel simulator 100 to the piston in the master cylinder 230 to increase when the driver steps on the pedal, thereby achieving an enhanced brake pedal feel.

[0128] In one example, the first circuit 250 includes a first valve body 251 and a second valve body 252. The first valve body 251 is used to control the flow of brake fluid from the reservoir to the pedal feel simulator 100 and the master cylinder, while the second valve body 252 is used to control the flow of brake fluid from the pedal feel simulator 100 to the master cylinder and the reservoir.

[0129] In one example, when the first circuit 250 is in the first open / close state, the first valve body is closed and the second valve body is open.

[0130] In one example, the second circuit 260 includes a third valve body 261 and a fourth valve body 262 .

[0131] In one example, the first valve body 251 , the second valve body 252 , the third valve body 261 , and the fourth valve body 262 are all solenoid valves.

[0132] In one example, the master cylinder includes a primary piston 231 and a secondary piston 232, the brake pedal is connected to the primary piston 231, one side of the secondary piston 232 is elastically connected to the primary piston 231 to form a first piston chamber, and one side of the secondary piston 232 is elastically connected to the inner surface of the master cylinder to form a second piston chamber. When the first circuit 250 is in the first open and closed state and the second circuit 260 is connected, the brake fluid in the piston cylinder flows into the first piston chamber, and the brake fluid in the first piston chamber flows into the pedal feel simulator 100.

[0133] More specifically, when first valve body 251 is closed and second valve body 252, third valve body 261, and fourth valve body 262 are all open, brake fluid enters the first piston chamber of master cylinder 230, causing primary piston 231 and secondary piston 232 to move left and right, respectively. Furthermore, the brake fluid in the first piston chamber of master cylinder 230 enters pedal feel simulator 100, causing first piston 103 in pedal feel simulator 100 to move upward, compressing elastic member 102 in pedal feel simulator 100. This increases the initial compression deformation of the elastic member in pedal feel simulator 100, increasing the simulated brake fluid pressure applied to the master cylinder 230 piston by pedal feel simulator 100 when the driver steps on the pedal, thereby enhancing brake pedal feel.

[0134] Please refer again Figure 3 or Figure 5 In one example, the brake system includes a first valve body 251, a third valve body 261, a fourth valve body 262, a drive motor 271, a second valve body 252, a fourth valve body 272, a fifth valve body 273, a sixth valve body 274, a seventh valve body 275, an eighth valve body 276, a ninth valve body 277, a tenth valve body 278, an eleventh valve body 279, a twelfth valve body 280, a thirteenth valve body 281, and a fourteenth valve body 282. The third valve body 261, the second valve body 252, the fourth valve body 272, the fifth valve body 273, the sixth valve body 274, the seventh valve body 275, the eighth valve body 276, and the ninth valve body 277 are all normally closed valves, and the first valve body 251, the fourth valve body 262, the tenth valve body 278, the eleventh valve body 279, the twelfth valve body 280, the thirteenth valve body 281, and the fourteenth valve body 282 are normally open valves.

[0135] It can be understood that in the default state (or the coil is not energized), the normally open valve is in the open state, the inlet and outlet are connected, and the pipeline is connected, while when the coil is energized, it is in the closed state, the inlet and outlet are isolated, and the pipeline is isolated.

[0136] It can also be understood that in the default state (or the coil is not energized), the normally closed valve is in a closed state, the inlet and outlet oil ports are isolated, and the pipeline is in a connected state, while when the coil is energized, it is in an open state, the inlet and outlet are connected, and the pipeline is connected.

[0137] Furthermore, when the user triggers an adjustment instruction for enhancing the feel of the brake pedal, the controller controls the operation of the drive motor 271 so that the brake fluid in the reservoir 210 is drawn into the piston cylinder 220 by the drive motor 271, the third valve body 261 and the second valve body 252 are energized to open, and the first valve body 251, the tenth valve body 278, the eleventh valve body 279, the twelfth valve body 280, the thirteenth valve body 281 and the fourteenth valve body 282 are energized to close, and the brake fluid enters the first piston chamber of the master cylinder 230, causing the primary piston 231 and the secondary piston 232 to be squeezed toward both ends respectively.

[0138] At the same time, the brake fluid in the first piston chamber of the master cylinder 230 enters the pedal feel simulator 100 along the second valve body 252, causing the first piston 103 in the pedal feel simulator 100 to move upward to squeeze the elastic part 102 in the pedal feel simulator 100. The initial compression deformation of the elastic part 102 in the pedal feel simulator 100 increases, so that when the driver steps on the pedal, the reaction force (that is, the simulated hydraulic pressure) applied by the pedal feel simulator 100 to the piston of the master cylinder 230 and the brake pedal 240 increases, thereby enhancing the brake pedal feel.

[0139] In this way, in the embodiment of the present application, according to the adjustment instruction, the fluid reservoir 210 can be controlled to deliver brake fluid to the brake fluid piston cylinder 220, and the first circuit 250 can be controlled to be in the first open and closed state, and the second circuit 260 can be controlled to be connected, so that the brake fluid in the piston cylinder 220 flows into the first piston chamber, and then the hydraulic pressure in the first chamber of the first piston chamber increases, and the brake fluid in the first piston chamber flows into the pedal feel simulator 100, and the pedal feel simulator 100 increases the simulated brake hydraulic pressure, thereby achieving an enhanced brake pedal feel.

[0140] In some embodiments of the present application, the controller is configured to:

[0141] When the adjustment instruction is used to enhance the brake pedal feel, and the intra-cavity hydraulic pressure of the second piston chamber is less than the target hydraulic pressure corresponding to the adjustment instruction, the fluid reservoir is controlled to deliver brake fluid to the piston cylinder, and the first circuit 250 is controlled to be in the first open and closed state, and the second circuit 260 is controlled to be connected, so that the intra-cavity hydraulic pressure increases, the brake fluid in the piston cylinder flows to the master cylinder, and the brake fluid in the master cylinder flows to the pedal feel simulator 100, so that the pedal feel simulator 100 is in the first state.

[0142] In the adjustment method of the embodiment of the present application, step 32 includes:

[0143] When the adjustment instruction is used to enhance the brake pedal feel, and the intra-cavity hydraulic pressure of the second piston chamber is less than the target hydraulic pressure corresponding to the adjustment instruction, the fluid reservoir is controlled to deliver brake fluid to the piston cylinder, and the first circuit 250 is controlled to be in the first open and closed state, and the second circuit 260 is controlled to be connected, so that the intra-cavity hydraulic pressure increases, the brake fluid in the piston cylinder flows to the master cylinder, and the brake fluid in the master cylinder flows to the pedal feel simulator 100, so that the pedal feel simulator 100 is in the first state.

[0144] The processor of the embodiment of the present application is also used to control the fluid reservoir to deliver brake fluid to the piston cylinder, control the first circuit 250 to be in the first open and closed state, and control the second circuit 260 to be connected, when the adjustment instruction is used to enhance the brake pedal feel and the intra-cavity hydraulic pressure of the second piston chamber is less than the target hydraulic pressure corresponding to the adjustment instruction, so that the intra-cavity hydraulic pressure increases, the brake fluid in the piston cylinder flows to the master cylinder, and the brake fluid in the master cylinder flows to the pedal feel simulator 100, so that the pedal feel simulator 100 is in the first state.

[0145] Specifically, in this embodiment of the present application, the brake system is further provided with a pressure sensor 283 for detecting the hydraulic pressure in the second piston chamber. Furthermore, to ensure that the brake pedal feel matches the actual braking effect of the vehicle, in this embodiment of the present application, the vehicle (or controller) can determine the target hydraulic pressure in the second piston chamber, also known as the target hydraulic pressure, based on an adjustment command triggered by the user.

[0146] Then, the controller can control the fluid reservoir 210 to deliver brake fluid to the brake fluid piston cylinder 220, and control the first valve body 251 to close and the second valve body 160 to open, so that the simulated brake fluid applied to the brake pedal 240 by the pedal feel simulator 100 reaches the target simulated brake fluid corresponding to the adjustment instruction. Based on the second cavity hydraulic pressure monitored in real time by the pressure sensor 283, it can be detected whether the second cavity hydraulic pressure in the second piston cavity reaches the "target hydraulic pressure corresponding to the 'target brake pedal feel set by the user'", so as to judge whether it is necessary to increase the cavity hydraulic pressure in the first piston cavity and the cavity hydraulic pressure in the second piston cavity, or to stop increasing the cavity hydraulic pressure in the first piston cavity and the cavity hydraulic pressure in the second piston cavity.

[0147] Furthermore, when the hydraulic pressure in the second piston chamber is less than the target hydraulic pressure, the piston cylinder 220 is driven to deliver brake fluid to the first piston chamber, so that the hydraulic pressure in the first piston chamber increases, the primary piston 231 and the secondary piston 232 move away from each other, and the secondary piston 232 moves to ( Figure 3 The elastic member (located on the left side of the secondary piston 232) applies force to compress the secondary piston chamber, and the space of the secondary piston chamber becomes smaller, so that the hydraulic pressure in the secondary piston chamber increases, so that the hydraulic pressure in the secondary piston chamber approaches the target hydraulic pressure.

[0148] Thus, in the embodiment of the present application, when the adjustment instruction is used to enhance the brake pedal feel and the intra-cavity hydraulic pressure of the second piston chamber is less than the target hydraulic pressure corresponding to the adjustment instruction, the piston cylinder 220 is driven to deliver brake fluid to the master cylinder to increase the intra-cavity hydraulic pressure.

[0149] In addition, it can be understood that the braking system in the related art is usually provided with a pressure sensor 283, and the embodiment of the present application can make full use of the detection function of the pressure sensor 283 to detect the hydraulic pressure in the second cavity, which can improve the utilization rate of the detection equipment to a certain extent.

[0150] In some embodiments of the present application, the controller is configured to:

[0151] When the adjustment instruction is used to enhance the brake pedal feel and the hydraulic pressure in the cavity matches the target hydraulic pressure, the first circuit 250 is controlled to be in the second open / close state.

[0152] In the adjustment method of the embodiment of the present application, step 32 includes:

[0153] When the adjustment instruction is used to enhance the brake pedal feel and the hydraulic pressure in the cavity matches the target hydraulic pressure, the first circuit 250 is controlled to be in the second open / close state.

[0154] The processor in the embodiment of the present application is further configured to control the first circuit 250 to be in the second open / close state when the adjustment instruction is used to enhance the brake pedal feel and the hydraulic pressure in the cavity matches the target hydraulic pressure.

[0155] Specifically, in certain embodiments of the present application, when the intra-cavity hydraulic pressure in the second piston cavity is greater than or equal to the target hydraulic pressure, or the difference in the target hydraulic pressure is small, and thus the intra-cavity hydraulic pressure in the second piston cavity matches the target hydraulic pressure, the first circuit 250 can be controlled to be in a second open and closed state to maintain the hydraulic pressure in the pedal feel simulator 100 unchanged, and maintain the compression deformation of the elastic member 102 in the pedal feel simulator 100, so that the enhanced brake pedal feel (or simulated brake hydraulic pressure) can be maintained.

[0156] Thus, in the embodiment of the present application, the first circuit 250 can be controlled to be in the second open / close state when the adjustment instruction is used to enhance the brake pedal feel and the intracavity hydraulic pressure matches the target hydraulic pressure, thereby maintaining the stable operation of the brake pedal.

[0157] In one example, the first circuit 250 includes a first valve body 251 and a second valve body 252. The first valve body 251 is used to control the flow of brake fluid from the fluid reservoir to the pedal feel simulator 100 and the master cylinder, while the second valve body 252 is used to control the flow of brake fluid from the pedal feel simulator 100 to the master cylinder and the fluid reservoir 220.

[0158] In one example, when the first circuit 250 is in the first open / closed state, both the first valve body and the second valve body are closed.

[0159] In such Figure 3 In one example shown, after the user triggers an adjustment instruction for adjusting the brake pedal feel, the controller can control the second valve body 252 to open to ensure communication between the pedal feel simulator 100 and the first piston chamber and the fluid reservoir 210 .

[0160] And, in Figure 3 In the example shown, the controller can control the fluid reservoir 210 to deliver brake fluid to the brake fluid piston cylinder 220, and control the first valve body 251 to close, the second valve body 160 to open, and the second valve body 252 to open, so that the simulated brake hydraulic pressure applied to the brake pedal 240 by the pedal feel simulator 100 can achieve the enhanced simulated brake hydraulic pressure.

[0161] Next, the controller detects whether the second-cavity hydraulic pressure in the second piston cavity reaches the "target hydraulic pressure corresponding to the 'target brake pedal feel set by the user'" based on the second-cavity hydraulic pressure monitored in real time by the pressure sensor 283, so as to determine whether it is necessary to increase the intra-cavity hydraulic pressure in the first piston cavity and the intra-cavity hydraulic pressure in the second piston cavity, or to stop the hydraulic pressure increase operation to achieve pressure maintenance.

[0162] Next, when the hydraulic pressure in the second piston chamber is greater than or equal to the target hydraulic pressure, the fluid reservoir 210 is controlled to stop supplying brake fluid to the brake fluid piston cylinder 220, and the second valve body 252 is controlled to close, so as to maintain the hydraulic pressure in the pedal feel simulator 100 unchanged, and maintain the compression deformation of the elastic part 102 in the pedal feel simulator 100, so that the enhanced brake pedal feel (or simulated brake hydraulic pressure) can be maintained.

[0163] Thus, in the embodiment of the present application, when the adjustable instruction is used to enhance the brake pedal feel and the intra-cavity hydraulic pressure matches the target hydraulic pressure, the first circuit 250 is controlled to be in the second open / closed state to maintain the simulated brake hydraulic pressure.

[0164] In certain embodiments of the present application, the first circuit 250 includes a first valve body 251 and a second valve body 252. The first valve body 251 is used to control the brake fluid flow state of the fluid reservoir 210 relative to the pedal feel simulator 100 and the master cylinder 230, and the second valve body 252 is used to control the brake fluid flow state of the pedal feel simulator 100 relative to the master cylinder 230 and the fluid reservoir 210. When the first circuit 250 is in a first open and closed state, the first valve body 251 is closed and the second valve body 252 is connected. When the first circuit 250 is in a second open and closed state, the first valve body 251 is closed and the second valve body 252 is closed.

[0165] In some embodiments of the present application, the controller is configured to:

[0166] When the adjustment instruction is used to weaken the brake pedal feel, the first circuit 250 is controlled to be in the third open-close state, and the second circuit 260 is controlled to be closed, so that the brake fluid in the pedal feel simulator 100 flows into the master cylinder 230, and the brake fluid in the master cylinder 230 flows into the fluid reservoir 210, so that the pedal feel simulator 100 is in the second state.

[0167] Step 32 of the embodiment of the present application includes:

[0168] When the adjustment instruction is used to weaken the brake pedal feel, the first circuit 250 is controlled to be in the third open-close state, and the second circuit 260 is controlled to be closed, so that the brake fluid in the pedal feel simulator 100 flows into the master cylinder 230, and the brake fluid in the master cylinder 230 flows into the fluid reservoir 210, so that the pedal feel simulator 100 is in the second state.

[0169] The processor of the embodiment of the present application is also used to control the first circuit 250 to be in the third open-close state and control the second circuit 260 to be closed when the adjustment instruction is used to weaken the brake pedal feel, so that the brake fluid in the pedal feel simulator 100 flows into the master cylinder 230, and the brake fluid in the master cylinder 230 flows into the fluid reservoir 210, so that the pedal feel simulator 100 is in the second state.

[0170] Specifically, after the user triggers the second adjustment command for weakening the brake pedal feel through hardware or software such as the central control screen, knob, or voice control function, the controller can control first circuit 250 to be in the third open / close state and control second circuit 260 to be closed. Then, because the hydraulic pressure within pedal feel simulator 100 is greater than the hydraulic pressure within master cylinder 230, the brake fluid in pedal feel simulator 100 flows into master cylinder 230 due to the hydraulic pressure difference, while the brake fluid in master cylinder 230 flows into reservoir 210210.

[0171] Since the brake fluid in the pedal feel simulator 100 flows to the master cylinder 230, the hydraulic pressure in the pedal feel simulator 100 decreases, the force applied by the first piston 103 to the elastic part 102 in the pedal feel simulator 100 decreases, and the deformation difficulty of the elastic part 102 in the pedal feel simulator 100 decreases, so that the simulated brake hydraulic pressure decreases and the brake pedal feel is weakened.

[0172] In this way, in an embodiment of the present application, when the adjustment instruction is used to weaken the brake pedal feel, the first circuit 250 can be controlled to be in the third open-close state, and the second circuit 260 can be controlled to be closed, so that the brake fluid in the pedal feel simulator 100 flows into the master cylinder, and the brake fluid in the master cylinder flows into the fluid reservoir 210 to put the pedal feel simulator 100 in the second state, thereby achieving a weakening of the brake pedal feel.

[0173] In one example, the first circuit 250 includes a first valve body 251 and a second valve body 252. The first valve body 251 is used to control the brake fluid flow state of the reservoir 210 relative to the pedal feel simulator 100 and the master cylinder 230, and the second valve body 252 is used to control the brake fluid flow state of the pedal feel simulator 100 relative to the master cylinder and the reservoir 210.

[0174] Furthermore, in one example, when the first circuit 250 is in the third open / close state, the first valve body 251 is closed and the second valve body 252 is open.

[0175] In one example, the second circuit 260 includes a third valve body 261 and a fourth valve body 262 .

[0176] In one example, the master cylinder 230 includes a primary piston 231 and a secondary piston 232, the brake pedal is connected to the primary piston 231, one side of the secondary piston 232 is elastically connected to the primary piston 231 to form a first piston chamber, and one side of the secondary piston 232 is elastically connected to the inner surface of the master cylinder to form a second piston chamber. When the first circuit 250 is in the third open-close state and the second circuit 260 is controlled to be closed, the brake fluid in the pedal feel simulator 100 flows into the first piston chamber, and the brake fluid in the second piston chamber flows into the fluid reservoir.

[0177] More specifically, when the first valve body 251, the third valve body 261 and the fourth valve body 262 are closed and the second valve body 252 is turned on, the hydraulic pressure in the pedal feel simulator 100 is greater than the hydraulic pressure in the first piston chamber in the master cylinder 230, so that the brake fluid in the pedal feel simulator 100 flows into the first piston chamber of the master cylinder 230 due to the hydraulic pressure difference, causing the main piston 231 and the secondary piston 232 to be squeezed toward both ends respectively, so that the secondary piston 232 moves to the left, causing the liquid in the second piston chamber to flow into the fluid reservoir 210.

[0178] In addition, because the brake fluid in the pedal feel simulator 100 flows into the first piston chamber of the master cylinder 230, the hydraulic pressure in the pedal feel simulator 100 decreases, the force applied by the first piston 103 to the elastic part 102 in the pedal feel simulator 100 decreases, and the deformation difficulty of the elastic part 102 in the pedal feel simulator 100 decreases, so that the simulated brake hydraulic pressure decreases and the brake pedal feel is weakened.

[0179] To more clearly illustrate the implementation of this application, please refer to Figure 6 , Figure 6 This is a schematic diagram of an application scenario in certain embodiments of the present application. Figure 6 The arrow symbol in the figure indicates the flow direction of the brake fluid.

[0180] Specifically, in Figure 6 In one example shown, the brake system includes a drive motor 271, a first valve body 251, a third valve body 261, a fourth valve body 262, a second valve body 252, a fourth valve body 272, a fifth valve body 273, a sixth valve body 274, a seventh valve body 275, an eighth valve body 276, a ninth valve body 277, a tenth valve body 278, an eleventh valve body 279, a twelfth valve body 280, a thirteenth valve body 281, and a fourteenth valve body 282. The third valve body 261, the second valve body 252, the fourth valve body 272, the fifth valve body 273, the sixth valve body 274, the seventh valve body 275, the eighth valve body 276, and the ninth valve body 277 are all normally closed valves, while the first valve body 251, the fourth valve body 262, the tenth valve body 278, the eleventh valve body 279, the twelfth valve body 280, the thirteenth valve body 281, and the fourteenth valve body 282 are normally open valves.

[0181] Furthermore, when the user triggers the second adjustment command for weakening the brake pedal feel, the controller energizes and opens second valve body 252, and energizes and closes fourth valve body 262, first valve body 251, and tenth valve body 278. Because the hydraulic pressure within pedal feel simulator 100 is greater than the hydraulic pressure within master cylinder 230, brake fluid flows from pedal feel simulator 100 into the first piston chamber of master cylinder 230, squeezing primary and secondary pistons 231 and 232 toward each other. Simultaneously, as secondary piston 232 moves leftward, fluid in the second piston chamber flows into reservoir 210.

[0182] In some embodiments of the present application, the controller is configured to:

[0183] When the adjustment instruction is used to weaken the brake pedal feel and the hydraulic pressure in the cavity is greater than the target hydraulic pressure corresponding to the second adjustment instruction, the first circuit 250 is controlled to be in the third open and close state, and the second circuit 260 is controlled to be closed, so that the brake fluid in the pedal feel simulator 100 flows into the master cylinder 230, and the brake fluid in the master cylinder 230 flows into the fluid reservoir, so that the pedal feel simulator 100 is in the second state.

[0184] In the adjustment method of the embodiment of the present application, step 32 includes:

[0185] When the adjustment instruction is used to weaken the brake pedal feel and the hydraulic pressure in the cavity is greater than the target hydraulic pressure corresponding to the adjustment instruction, the first circuit 250 is controlled to be in the third open and close state, and the second circuit 260 is controlled to be closed, so that the brake fluid in the pedal feel simulator 100 flows into the master cylinder 230, and the brake fluid in the master cylinder 230 flows into the fluid reservoir, so that the pedal feel simulator 100 is in the second state.

[0186] The processor of the embodiment of the present application is also used to control the first circuit 250 to be in the third open and close state and control the second circuit 260 to be closed when the adjustment instruction is used to weaken the brake pedal feel and the hydraulic pressure in the cavity is greater than the target hydraulic pressure corresponding to the adjustment instruction, so that the brake fluid in the pedal feel simulator 100 flows into the master cylinder 230 and the brake fluid in the master cylinder 230 flows into the fluid reservoir, so that the pedal feel simulator 100 is in the second state.

[0187] To more clearly illustrate the implementation of this application, please refer to Figure 7 That is, when the hydraulic pressure in the second piston chamber of the master cylinder 230 is greater than the target hydraulic pressure, the controller can control the first circuit 250 to be in the third open-close state and control the second circuit 260 to be closed, so that the brake fluid in the pedal feel simulator 100 flows into the master cylinder and the brake fluid in the master cylinder 230 flows into the fluid reservoir, thereby reducing the deformation of the elastic member in the pedal feel simulator 100 and the hydraulic pressure in the master cylinder 230, and finally placing the pedal feel simulator 100 in the second state.

[0188] In one example, the master cylinder 230 includes a primary piston 231 and a secondary piston 232, the brake pedal is connected to the primary piston 231, one side of the secondary piston 232 is elastically connected to the primary piston 231 to form a first piston chamber, and one side of the secondary piston 232 is elastically connected to the inner surface of the master cylinder 230 to form a second piston chamber. When the first circuit 250 is in the third open-close state and the second circuit 260 is controlled to be closed, the brake fluid in the pedal feel simulator 100 flows into the first piston chamber, and the brake fluid in the second piston chamber flows into the fluid reservoir.

[0189] More specifically, the controller uses pressure sensor 283 to detect in real time whether the hydraulic pressure in the second piston chamber of master cylinder 230 is at the target hydraulic pressure. Then, when the hydraulic pressure in the second piston chamber detected by pressure sensor 283 exceeds the target hydraulic pressure, the controller controls second valve body 252 to close and first valve body 251 to open, causing the brake fluid in the first piston chamber to flow back into reservoir 210, thereby reducing the hydraulic pressures in both the first and second piston chambers.

[0190] In this way, in an embodiment of the present application, when the adjustment instruction is used to weaken the brake pedal feel and the hydraulic pressure in the cavity is greater than the target hydraulic pressure corresponding to the adjustment instruction, the first circuit 250 can be controlled to be in the third open and close state, and the second circuit 260 can be controlled to be closed, so that the brake fluid in the pedal feel simulator 100 flows into the master cylinder 230, and the brake fluid in the master cylinder 230 flows into the fluid reservoir, so that the pedal feel simulator 100 is in the second state.

[0191] In some embodiments of the present application, the controller is configured to:

[0192] When the adjustment instruction is used to weaken the brake pedal feel and the intra-cavity hydraulic pressure is greater than the target hydraulic pressure, the first circuit 250 is controlled to switch between the third open and closed state and the fourth open and closed state, and the second circuit 260 is controlled to be closed, so that the brake fluid in the first piston cavity flows into the reservoir 210 to reduce the intra-cavity hydraulic pressure until it is the same as the target hydraulic pressure and puts the pedal feel simulator 100 in the second state.

[0193] Step 32 of the embodiment of the present application includes:

[0194] When the adjustment instruction is used to weaken the brake pedal feel and the intra-cavity hydraulic pressure is greater than the target hydraulic pressure, the first circuit 250 is controlled to switch between the third open and closed state and the fourth open and closed state, and the second circuit 260 is controlled to be closed, so that the brake fluid in the first piston cavity flows into the reservoir 210 to reduce the intra-cavity hydraulic pressure until it is the same as the target hydraulic pressure and puts the pedal feel simulator 100 in the second state.

[0195] The processor of the embodiment of the present application is also used to control the first circuit 250 to switch between the third open and closed state and the fourth open and closed state when the adjustment instruction is used to weaken the brake pedal feel and the hydraulic pressure in the cavity is greater than the target hydraulic pressure, and control the second circuit 260 to close, so that the brake fluid in the first piston cavity flows into the fluid reservoir 210, so as to reduce the hydraulic pressure in the cavity until it is the same as the target hydraulic pressure and put the pedal feel simulator 100 into the second state.

[0196] To more clearly illustrate the implementation of this application, please refer to Figure 7 That is, the controller detects in real time through the pressure sensor 283 whether the hydraulic pressure in the second piston chamber of the master cylinder 230 is the target hydraulic pressure. Then, when the hydraulic pressure in the second piston chamber detected by the pressure sensor 283 is greater than the target hydraulic pressure, the first circuit 250 is controlled to be in the third open-close state, so that the brake fluid in the first piston chamber flows back to the reservoir 210, and the hydraulic pressure in the first piston chamber and the hydraulic pressure in the second piston chamber are both reduced. Then, the first circuit 250 is controlled to be in the fourth open-close state to prepare for the next round of pressure relief operation.

[0197] If, after first circuit 250 is in the fourth open / close state, the hydraulic pressure in the second piston chamber detected by pressure sensor 283 is still greater than the target hydraulic pressure, first circuit 250 is controlled to the third open / close state, causing the brake fluid in the first piston chamber to flow back into reservoir 210, further reducing both the hydraulic pressures in the first and second piston chambers. First circuit 250 is then controlled to the fourth open / close state to prepare for the next round of pressure relief operations.

[0198] It is understandable that the controller repeatedly controls the first circuit 250 to switch between the third open / close state and the fourth open / close state to cyclically perform multiple pressure relief operations until the hydraulic pressure in the second piston chamber is less than or equal to the target hydraulic pressure.

[0199] In one example, the first circuit 250 includes a first valve body 251 and a second valve body 252. The first valve body 251 is used to control the brake fluid flow state of the reservoir relative to the pedal feel simulator 100 and the master cylinder, and the second valve body 252 is used to control the brake fluid flow state of the pedal feel simulator 100 relative to the master cylinder and the reservoir. When the first circuit 250 is in the third opening and closing state, the first valve body 251 is closed and the second valve body 252 is connected. When the first circuit 250 is in the fourth opening and closing state, the first valve body 251 is connected and the second valve body 252 is closed.

[0200] For more details, please refer again to Figure 7That is, the controller detects in real time through the pressure sensor 283 whether the hydraulic pressure in the second piston chamber of the master cylinder 230 is the target hydraulic pressure. Then, when the hydraulic pressure in the second piston chamber detected by the pressure sensor 283 is greater than the target hydraulic pressure, the second valve body 252 is controlled to close and the first valve body 251 is controlled to open, so that the brake fluid in the first piston chamber flows back to the reservoir 210, and the hydraulic pressure in the first piston chamber and the hydraulic pressure in the second piston chamber are both reduced. Then, the first valve body 251 is controlled to close and the second valve body 252 is controlled to open to prepare for the next round of pressure relief operation.

[0201] Then, if the hydraulic pressure in the second piston chamber detected by pressure sensor 283 is still greater than the target hydraulic pressure after first valve body 251 is closed and second valve body 252 is opened, second valve body 252 is closed and first valve body 251 is opened, causing the brake fluid in the first piston chamber to flow back into reservoir 210, further reducing the hydraulic pressures in both the first and second piston chambers. Then, first valve body 251 is closed and second valve body 252 is opened to prepare for the next round of pressure relief.

[0202] It is understandable that the controller repeatedly controls the opening and closing of the first valve body 251 and the second valve body 252 to cyclically perform multiple pressure relief operations until the hydraulic pressure in the second piston chamber is less than or equal to the target hydraulic pressure.

[0203] In this way, in an embodiment of the present application, when the adjustment instruction is used to weaken the brake pedal feel and the hydraulic pressure in the cavity is greater than the target hydraulic pressure, the first circuit 250 can be controlled to switch between the third open and closed state and the fourth open and closed state, and the second circuit 260 can be controlled to close, so that the brake fluid in the first piston cavity flows into the fluid reservoir to reduce the hydraulic pressure in the cavity until it is the same as the target hydraulic pressure and put the pedal feel simulator 100 in the second state.

[0204] In certain embodiments of the present application, the brake system is further configured with a pressure relief circuit based on the reverse rotation of the drive motor. Specifically, the drive motor connected to the primary piston 231 drives the primary piston 231 away from the secondary piston 232, actively increasing the volume of the first piston chamber. This decreases the hydraulic pressure within the first piston chamber, which in turn decreases the hydraulic pressure within the second piston chamber. This causes the brake fluid within the first piston chamber to flow into the reservoir 210, thereby relieving pressure from the second piston chamber.

[0205] It can be understood that, compared with the method of only controlling the opening and closing states of the second valve body 252 and the first valve body 251 to allow the brake fluid in the first piston chamber to flow to the fluid reservoir 210, the method of driving the main piston 231 by the driving motor to reduce the intra-cavity hydraulic pressure of the first piston chamber and the intra-cavity hydraulic pressure of the second piston chamber, and then allowing the brake fluid in the first piston chamber to flow to the fluid reservoir 210 can achieve faster pressure relief of the second piston chamber.

[0206] In one example, when the second adjustment instruction triggered by the user can reduce the pedal feel by a larger magnitude, the controller can control the second valve body 252 to close, the first valve body 251 to open, and drive the primary piston 231 to move away from the secondary piston 232. Conversely, when the second adjustment instruction triggered by the user can reduce the pedal feel by a smaller magnitude, the controller can control only the second valve body 252 to close and the first valve body 251 to open.

[0207] In one example, a vehicle provides a gear-based pedal feel adjustment function. For example, users can trigger pedal feel adjustment commands using the central control screen motor, knob rotation, voice control, etc. to set the vehicle's pedal feel to any of first, second, third, and fourth gears.

[0208] Furthermore, when the user triggers a second adjustment command, and the second adjustment command is capable of reducing the pedal feel by two or more gears, such as reducing the pedal feel from fourth gear to second gear, the controller may control the second valve body 252 to close, the first valve body 251 to open, and drive the primary piston 231 to move away from the secondary piston 232. Conversely, when the second adjustment command triggered by the user is capable of reducing the pedal feel by one gear, the controller may control only the second valve body 252 to close and the first valve body 251 to open.

[0209] It is understandable that gear-based pedal feel adjustment is only one feasible method. In actual situations, pedal feel adjustment based on numerical values or other methods can also be used, which can be set specifically according to actual conditions.

[0210] In some embodiments of the present application, the controller is configured to:

[0211] When the change rate parameter of the brake pedal 240 is greater than or equal to the preset rate threshold, the first circuit 250 is controlled to be turned on and the second circuit 260 is controlled to be turned off, so that the brake fluid in the pedal feel simulator 100 flows into the fluid reservoir, so that the pedal feel simulator 100 is in the second state.

[0212] The adjustment method provided in the embodiments of the present application also includes:

[0213] When the change rate parameter of the brake pedal 240 is greater than or equal to the preset rate threshold, the first circuit 250 is controlled to be turned on and the second circuit 260 is controlled to be closed, so that the brake fluid in the pedal feel simulator 100 flows into the fluid reservoir, so that the pedal feel simulator 100 is in the second state.

[0214] The processor of the embodiment of the present application is also used to control the first circuit 250 to be turned on and the second circuit 260 to be turned off when the change rate parameter of the brake pedal is greater than or equal to a preset rate threshold, so that the brake fluid in the pedal feel simulator 100 flows into the fluid reservoir, so that the pedal feel simulator 100 is in the second state.

[0215] Specifically, in the embodiment of the present application, in order to ensure that the vehicle can generate a larger braking force when the user steps on the brake pedal 240 with less force in an emergency braking scenario, thereby improving the braking response speed and shortening the braking distance, the embodiment of the present application can also quickly reduce the brake pedal feel when the vehicle is detected to be braking suddenly.

[0216] To more clearly illustrate the implementation of this application, please refer to Figure 7 , Figure 7 The figure is a schematic diagram of an application scenario in certain embodiments of the present application. Specifically, when a user presses on the brake pedal 240 with considerable force, causing the rate of change parameter of the brake pedal 240 to be greater than or equal to a preset rate threshold, the braking system determines that the user intends to perform emergency braking. Therefore, the first valve body 251 and the second valve body 252 are both opened, and the second valve body 160 is closed. At this time, because the hydraulic pressure in the pedal feel simulator 100 is greater than the hydraulic pressure in the fluid reservoir 210, the brake fluid in the pedal feel simulator 100 flows back into the fluid reservoir 210, causing the brake pedal feel to rapidly weaken. Consequently, when the user presses on the brake pedal 240 with less force, the vehicle can generate greater braking force, thereby improving the braking response speed and shortening the braking distance.

[0217] To more clearly illustrate the implementation of this application, please refer to Figure 7That is, the brake system includes a drive motor 271, a first valve body 251, a third valve body 261, a fourth valve body 262, a second valve body 252, a fourth valve body 272, a fifth valve body 273, a sixth valve body 274, a seventh valve body 275, an eighth valve body 276, a ninth valve body 277, a tenth valve body 278, an eleventh valve body 279, a twelfth valve body 280, a thirteenth valve body 281, and a fourteenth valve body 282. Among them, the third valve body 261, the second valve body 252, the fourth valve body 272, the fifth valve body 273, the sixth valve body 274, the seventh valve body 275, the eighth valve body 276 and the ninth valve body 277 are all normally closed valves. When the first valve body 251, the fourth valve body 262, the tenth valve body 278, the eleventh valve body 279, the twelfth valve body 280, the thirteenth valve body 281 and the fourteenth valve body 282 are normally open valves, the controller can control the first valve body 251 and the second valve body 252 to be opened, and control the fourth valve body 262 and the tenth valve body 278 to be powered on and closed when the change rate parameter of the brake pedal 240 is greater than or equal to the preset rate threshold. At this time, since the hydraulic pressure in the pedal feel simulator 100 is greater than the hydraulic pressure in the fluid reservoir 210, the brake fluid in the pedal feel simulator 100 flows back to the fluid reservoir 210, causing the brake pedal feel to weaken rapidly.

[0218] It is understandable that, in an emergency braking scenario, the controller may stop detecting the hydraulic pressure in the second piston chamber via the pressure sensor 283 .

[0219] In this way, in an embodiment of the present application, when the change rate parameter of the brake pedal 240 is greater than or equal to the preset rate threshold, the first circuit 250 can be controlled to be turned on and the second circuit 260 can be controlled to be turned off, so that the brake fluid in the pedal feel simulator 100 flows into the fluid reservoir 210, and then the pedal feel simulator 100 is in the second state, thereby achieving a rapid weakening of the brake pedal feel.

[0220] In certain embodiments of the present application, the controller is configured as follows:

[0221] When the opening of the brake pedal 240 is less than or equal to the preset opening, the opening and closing states of the first circuit 250 and the second circuit 260 are controlled according to the adjustment instructions to control the flow of brake fluid between the fluid reservoir, the piston cylinder, the master cylinder and the pedal feel simulator 100, so that the pedal feel simulator 100 is in the first state or the second state.

[0222] In the adjustment method of the embodiment of the present application, step 32 includes:

[0223] When the opening of the brake pedal 240 is less than or equal to the preset opening, the opening and closing states of the first circuit 250 and the second circuit 260 are controlled according to the adjustment instructions to control the flow of brake fluid between the fluid reservoir, the piston cylinder, the master cylinder and the pedal feel simulator 100, so that the pedal feel simulator 100 is in the first state or the second state.

[0224] The processor of the embodiment of the present application is also used to control the opening and closing state of the first circuit 250 and the opening and closing state of the second circuit 260 according to the adjustment instruction when the opening of the brake pedal is less than or equal to the preset opening, so as to control the flow of brake fluid between the fluid reservoir, the piston cylinder, the master cylinder and the pedal feel simulator 100, so that the pedal feel simulator 100 is in the first state or the second state.

[0225] Specifically, in an embodiment of the present application, in order to ensure the safety of the vehicle and the users in the vehicle, the vehicle may respond to a pedal feel adjustment instruction triggered by the user when the opening of the brake pedal 240 is less than or equal to a preset opening.

[0226] In one example, the preset opening is 0, which means that the user has not stepped on the brake pedal 240 .

[0227] It can also be understood that if the user presses on the brake pedal 240 so that the opening of the brake pedal 240 is greater than 0 and triggers the pedal feel adjustment instruction at the same time, the vehicle can release the brake pedal 240 so that the opening of the brake pedal 240 is equal to 0, and then control the opening and closing state of the first valve body 251 and the opening and closing state of the second valve body 160 according to the pedal feel adjustment instruction triggered by the user, thereby completing the adjustment of the brake pedal feel.

[0228] In this way, in an embodiment of the present application, when the opening of the brake pedal 240 is less than or equal to the preset opening, the opening and closing state of the first valve body 251 and the opening and closing state of the second valve body 160 can be controlled according to the adjustment instruction, so that the adjustment of the brake pedal feel can be carried out safely.

[0229] In one example, to ensure the safety of the vehicle and the users in the vehicle, the vehicle may provide feedback to the user to prompt the user to release the brake pedal 240 when the user triggers an adjustment instruction but the opening of the brake pedal 240 is greater than the preset opening, so that the opening of the brake pedal 240 is less than or equal to the preset opening.

[0230] In one example, the controller may issue instructions to one or more devices in the vehicle, such as sound-emitting components (such as speakers), display components (such as a central control screen), etc., so that the device receiving the instructions can feedback preset prompt information to the user.

[0231] In one example, when the user steps on the brake pedal 240, triggering a pedal feel adjustment instruction, and the pedal feel adjustment instruction is used to enhance the brake pedal feel, the vehicle can control the opening and closing states of the first valve body 251 and the opening and closing states of the second valve body 160, so that the pedal feel simulator 100 applies a larger simulated brake hydraulic pressure to the brake pedal 240, thereby achieving an enhanced brake pedal feel.

[0232] In one example, the vehicle can determine the target pedal feel expected by the user based on the current state information and control the opening and closing states of the first valve body 251 and the opening and closing states of the second valve body 160, so that the pedal feel simulator 100 can feedback the target pedal feel, that is, the target simulated brake hydraulic pressure, to the brake pedal feel, so that the brake pedal feel can match the current state of the vehicle.

[0233] In one example, the current state information is the current driving surface type. For example, when the current driving surface type is a wading surface, the pedal feel simulator 100 applies a larger simulated brake fluid pressure to the brake pedal 240, while when the current driving surface type is a dry asphalt surface, the pedal feel simulator 100 applies a smaller simulated brake fluid pressure to the brake pedal 240.

[0234] In one example, the current state information is a current driving mode, wherein the current driving mode is one of a sports mode, an economy mode, and the like.

[0235] In one example, the current state information is the current driving environment temperature. For example, when the current driving environment temperature is low and the brake fluid viscosity is high, the pedal feel simulator 100 applies a higher simulated brake fluid pressure to the brake pedal 240. On the other hand, when the current driving environment temperature is high and the brake fluid viscosity is low, the pedal feel simulator 100 applies a lower simulated brake fluid pressure to the brake pedal 240.

[0236] In one example, the current state information includes user vital information. For example, after the vehicle captures a user's facial image or iris image, such as a feature image, using an in-vehicle camera or other component, and determines the current driver's identity based on these feature images, the current driver's preset brake pedal feel can be determined based on a preset mapping relationship between driver identity and preset brake pedal feel. This allows the controller to control the opening and closing states of the first valve body 251 and the opening and closing states of the second valve body 160, so that the pedal feel simulator 100 can provide feedback on the "preset brake pedal feel of the current driver" as a brake pedal feel.

[0237] Therefore, the implementation methods of the present application can realize automatic adjustment of pedal feel in combination with the relevant functional definitions of the entire vehicle and the vehicle environment.

[0238] In one example, the user can pre-define the default pedal feel under different driving modes. Then, when the vehicle switches to a different driving mode, the pedal feel can be adjusted to the corresponding default pedal feel accordingly, thereby achieving automatic adjustment of the pedal feel.

[0239] In one example, users can add their own pedal feel style based on their needs, preferences, habits, etc., and can associate the added pedal feel with the driving mode;

[0240] In one example, the vehicle can automatically associate the driver with the pedal feel set by the driver based on signals such as seat memory and the driver's facial features scanned by the driver, and can also associate the set pedal feel with the driving mode;

[0241] In one example, the vehicle can self-adjust the pedal feel based on the current driving environment temperature and the viscosity characteristics of the brake fluid in different environments.

[0242] In an example, see Figure 8 , Figure 8 Schematic diagram of application scenarios in certain embodiments of the present application. Specifically, in one example, pedal feel adjustment is primarily divided into adjustment when the vehicle speed is non-zero and adjustment when the vehicle speed is zero (i.e., the vehicle is stationary). Adjustment when the vehicle speed is non-zero is further divided into adjustment during normal braking, adjustment during emergency braking, and adjustment when no braking is performed. Adjustment when the vehicle speed is zero is further divided into adjustment when the brake pedal 240 is depressed and adjustment when the brake pedal 240 is fully released.

[0243] Furthermore, when the vehicle is not at zero, the controller will only perform pedal feel adjustment after braking is completed, that is, the pedal feel adjustment operation is performed when the user completely releases the brake pedal 240 so that the opening of the brake pedal 240 is zero.

[0244] Furthermore, when the vehicle is stationary, the user can adjust the pedal feel while stepping on the brake pedal 240 to enhance the pedal feel. If the pedal feel is enhanced too much, the driver's foot will feel the thrust fed back by the brake pedal 240 .

[0245] Furthermore, when the user adjusts the pedal feel to weaken the pedal feel, the controller is required to adjust the pedal feel only after the user completely releases the brake pedal 240. Therefore, when the user adjusts the pedal feel to weaken the pedal feel and the user does not completely release the brake pedal 240, the controller can provide feedback to the user to prompt the user to release the brake pedal 240.

[0246] In addition, when the weakening adjustment range is large, the main piston 231 can be pulled by the driving motor connected to the main piston 231 to achieve a rapid decrease in the hydraulic pressure in the second piston chamber.

[0247] An embodiment of the present application further provides a vehicle comprising the above-mentioned braking system, or comprising the above-mentioned electronic device.

[0248] An embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by one or more processors, the above-mentioned method for adjusting the brake pedal feel is implemented.

[0249] An embodiment of the present application further provides a computer program product, including a computer program / instruction, which implements the above-mentioned method for adjusting the brake pedal feel when executed by a processor.

[0250] In the description of this specification, the descriptions with reference to the terms "particularly", "further", "particularly", "understandably", etc. are intended to mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms are not intended to refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0251] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0252] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A pedal feel simulator for a braking system, characterized in that: The pedal feel simulator comprises a main cavity, an elastic member is arranged in the main cavity, and the compression deformation of the elastic member is adjustable.

2. The pedal feel simulator according to claim 1, wherein: The pedal feel simulator comprises a first end and a second end, wherein the first end and the second end are adapted to be connected to an oil circuit of the brake system; A first piston and a second piston are provided in the main cavity. The first piston is close to the first end, and the second piston is close to the second end. The elastic member is located between the first piston and the second piston.

3. The pedal feel simulator according to claim 1, wherein: The pedal feel simulator comprises a first end and a second end, wherein the first end and the second end are adapted to be connected to an oil circuit of the brake system; A first piston and a second piston are provided in the main cavity, the first piston is close to the first end, and the second piston is provided in the middle of the main cavity; A sub-cavity is formed between the first piston and the second piston, the second end is communicated with the sub-cavity, and the elastic member is located on a side of the second piston away from the first piston.

4. The pedal feel simulator according to claim 2 or 3, characterized in that: The stroke of the first piston relative to the second piston is positively correlated with the amount of compression deformation.

5. The pedal feel simulator according to any one of claims 1 to 3, characterized in that: The pedal feel simulator further includes a limiting component for preventing the elastic member from deforming, and the limiting component includes at least one limiting block.

6. A braking system, characterized in that: The pedal feel simulator comprises the pedal feel simulator according to any one of claims 1 to 5.

7. The system according to claim 6, characterized in that The system also includes a fluid reservoir, a piston cylinder, a master cylinder, and a brake pedal; The fluid reservoir is connected to the master cylinder and the pedal feel simulator via a first circuit, the fluid reservoir is connected to the piston cylinder, the piston cylinder is connected to the master cylinder via a second circuit, and the brake pedal and the pedal feel simulator are both connected to the master cylinder.

8. The system according to claim 7, characterized in that The system further includes a controller configured to: Obtaining an adjustment instruction for the brake pedal feel, and controlling the opening and closing states of the first circuit and the second circuit according to the adjustment instruction to control the flow of brake fluid between the fluid reservoir, the piston cylinder, the master cylinder, and the pedal feel simulator, so that the pedal feel simulator has a first state and a second state; Wherein, when the pedal feel simulator is in the first state, the compressive deformation amount of the elastic member is greater than the compressive deformation amount of the elastic member in the second state.

9. The system according to claim 8, characterized in that The controller is configured to: When the adjustment instruction is used to enhance the brake pedal feel, the fluid reservoir is controlled to deliver brake fluid to the piston cylinder, the first circuit is controlled to be in a first open and closed state, and the second circuit is controlled to be conductive, so that the brake fluid in the piston cylinder flows to the master cylinder, and the brake fluid in the master cylinder flows to the pedal feel simulator, so that the pedal feel simulator is in the first state.

10. The system according to claim 9, characterized in that The master cylinder includes a primary piston and a secondary piston, the brake pedal is connected to the primary piston, one side of the secondary piston is elastically connected to the primary piston to form a first piston chamber, and one side of the secondary piston is elastically connected to the inner surface of the master cylinder to form a second piston chamber. When the first circuit is in a first open-closed state and the second circuit is connected, the brake fluid in the piston cylinder flows into the first piston chamber, and the brake fluid in the first piston chamber flows into the pedal feel simulator.

11. The system according to claim 10, wherein: The controller is configured to: When the adjustment instruction is used to enhance the brake pedal feel and the intra-cavity hydraulic pressure of the second piston chamber is less than the target hydraulic pressure corresponding to the adjustment instruction, the fluid reservoir is controlled to deliver brake fluid to the piston cylinder, and the first circuit is controlled to be in a first open and closed state, and the second circuit is controlled to be conductive, so that the intra-cavity hydraulic pressure increases, the brake fluid in the piston cylinder flows to the master cylinder, and the brake fluid in the master cylinder flows to the pedal feel simulator, so that the pedal feel simulator is in the first state.

12. The system according to claim 11, wherein: The controller is configured to: When the adjustment instruction is used to enhance the brake pedal feel and the intra-cavity hydraulic pressure matches the target hydraulic pressure, the first circuit is controlled to be in a second open / close state.

13. The system according to claim 12, wherein: The first circuit includes a first valve body and a second valve body. The first valve body is used to control the brake fluid flow state of the fluid reservoir relative to the pedal feel simulator and the master cylinder, and the second valve body is used to control the brake fluid flow state of the pedal feel simulator relative to the master cylinder and the fluid reservoir. When the first circuit is in the first opening and closing state, the first valve body is closed and the second valve body is connected. When the first circuit is in the second opening and closing state, the first valve body is closed and the second valve body is closed.

14. The system according to claim 8, wherein: The controller is configured to: When the adjustment instruction is used to weaken the brake pedal feel, the first circuit is controlled to be in the third open-close state, and the second circuit is controlled to be closed, so that the brake fluid in the pedal feel simulator flows into the master cylinder, and the brake fluid in the master cylinder flows into the fluid reservoir, so that the pedal feel simulator is in the second state.

15. The system according to claim 14, wherein: The master cylinder includes a primary piston and a secondary piston, the brake pedal is connected to the primary piston, one side of the secondary piston is elastically connected to the primary piston to form a first piston chamber, and one side of the secondary piston is elastically connected to the inner surface of the master cylinder to form a second piston chamber. When the first circuit is in the third opening and closing state and the second circuit is controlled to be closed, the brake fluid in the pedal feel simulator flows into the first piston chamber, and the brake fluid in the second piston chamber flows into the fluid reservoir.

16. The system according to claim 15, wherein: The controller is configured to: When the adjustment instruction is used to weaken the brake pedal feel and the hydraulic pressure in the cavity is greater than the target hydraulic pressure corresponding to the adjustment instruction, the first circuit is controlled to be in the third open-close state, and the second circuit is controlled to be closed, so that the brake fluid in the pedal feel simulator flows into the master cylinder, and the brake fluid in the master cylinder flows into the fluid reservoir, so that the pedal feel simulator is in the second state.

17. The system according to claim 16, wherein: The controller is configured to: When the adjustment instruction is used to weaken the brake pedal feel and the hydraulic pressure in the cavity is greater than the target hydraulic pressure, the first circuit is controlled to switch between the third open and close state and the fourth open and close state, and the second circuit is controlled to be closed, so that the brake fluid in the first piston cavity flows into the fluid reservoir, so as to reduce the hydraulic pressure in the cavity until it is the same as the target hydraulic pressure and put the pedal feel simulator in the second state.

18. The system according to claim 17, wherein: The first circuit includes a first valve body and a second valve body. The first valve body is used to control the brake fluid flow state of the fluid reservoir relative to the pedal feel simulator and the master cylinder, and the second valve body is used to control the brake fluid flow state of the pedal feel simulator relative to the master cylinder and the fluid reservoir. When the first circuit is in the third opening and closing state, the first valve body is closed and the second valve body is connected. When the first circuit is in the fourth opening and closing state, the first valve body is connected and the second valve body is closed.

19. The system according to claim 8, wherein: The controller is configured to: When the change rate parameter of the brake pedal is greater than or equal to a preset rate threshold, the first circuit is controlled to be turned on and the second circuit is controlled to be turned off, so that the brake fluid in the pedal feel simulator flows into the fluid reservoir, so that the pedal feel simulator is in the second state.

20. The system according to claim 8, wherein The controller is configured as follows: When the opening of the brake pedal is less than or equal to a preset opening, the opening and closing states of the first circuit and the second circuit are controlled according to the adjustment instruction to control the flow of brake fluid between the fluid reservoir, the piston cylinder, the master cylinder and the pedal feel simulator, so that the pedal feel simulator is in the first state or the second state.

21. A method for adjusting brake pedal feel, characterized in that: Applied to the braking system of claims 6-20, the method comprises: The brake system is controlled so that the pedal feel simulator has a first state and a second state, wherein the compressive deformation amount of the elastic member in the first state is greater than the compressive deformation amount of the elastic member in the second state.

22. The adjustment method according to claim 21, characterized in that: The adjustment method further comprises: An adjustment instruction for the brake pedal feel is obtained, and a flow of brake fluid in the brake system is controlled according to the adjustment instruction, so that the pedal feel simulator has a first state and a second state.

23. An electronic device, characterized in that: The method comprises a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the method according to claims 21-22 is implemented.

24. A vehicle, characterized in that: The pedal feel simulator according to any one of claims 1 to 5, or the braking system according to any one of claims 6 to 20, or the electronic device according to claim 23.

25. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by one or more processors, the method of claims 21-22 is implemented.

26. A computer program product, characterized in that The invention comprises a computer program / instruction, which implements the method of claims 21-22 when executed by a processor.

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