A braking system and a vehicle

Abstract

The present disclosure relates to a braking system and a vehicle. The braking system includes a manual master cylinder, a pedal feel simulator, and an electric master cylinder. The manual master cylinder includes a braking chamber. The pedal feel simulator includes a housing and a partition member disposed within the housing. The partition member divides the interior of the housing into a manual chamber and a voltage chamber. The manual chamber is in communication with the braking chamber. The braking chamber and the hydraulic chamber of the electric master cylinder are in communication with an end braking device. The hydraulic chamber of the electric master cylinder is in communication with the voltage chamber. The pressure provided by the electric master cylinder to the voltage chamber is set to balance the braking force provided by the manual master cylinder to the manual chamber. The braking system disclosed in this article has a simple structure, reliable braking, good pedal feel simulation effect, and good driving experience for users.

Description

Technical Field

[0001] This application relates to, but is not limited to, hydraulic braking technology, and particularly to a braking system and a vehicle. Background Art

[0002] Currently, most braking systems on the market are configured separately with systems such as ABS (Antilock Brake System), EBD (Electronic Brake force Distribution), ESP (Electronic Stability Program), TCS (Traction Control System), and ACC (Adaptive Cruise Control System). Such braking systems have a large number of components, a complex structure, and low working reliability.

[0003] In addition, there are also some integrated ONE BOX solutions to integrate the above-mentioned ABS and other systems. However, even such an integrated braking system cannot simulate the foot feeling well, reducing the operating experience of the driver. Summary of the Invention

[0004] Embodiments of this application provide a braking system and a vehicle, which have a simple structure, reliable braking, good foot feeling simulation effect, and good driving experience for users.

[0005] Embodiments of this application provide a braking system. The braking system includes a manual master cylinder, a foot feeling force simulator, and an electric master cylinder. The manual master cylinder includes a braking chamber. The foot feeling force simulator includes a housing and a partition member disposed inside the housing. The partition member divides the inside of the housing into a manual chamber and a voltage chamber. The manual chamber is communicated with the braking chamber. The braking chamber and the hydraulic chamber of the electric master cylinder are communicated with an end braking device.

[0006] The hydraulic chamber of the electric master cylinder is communicated with the voltage chamber. The pressure provided by the electric master cylinder to the voltage chamber is set to: balance the braking force provided by the manual master cylinder to the manual chamber.

[0007] In an exemplary embodiment, the hydraulic chamber of the electric master cylinder is communicated with the inlet of the voltage chamber through a first pipeline. A first solenoid valve is disposed on the first pipeline. A second solenoid valve is disposed at the outlet of the voltage chamber.

[0008] The opening degrees of the first solenoid valve and the second solenoid valve are adjustable to adapt to the pressure in the manual chamber.

[0009] In an exemplary embodiment, the brake chamber is communicated with the terminal brake device through a second pipeline; the first pipeline is communicated with the second pipeline through a third pipeline, so that the hydraulic chamber of the electric master cylinder is communicated with the terminal brake device.

[0010] In an exemplary embodiment, the separator includes a first piston and a second piston, the first piston and a portion of the housing enclose the voltage chamber, and the voltage chamber is located on a side of the first piston away from the second piston;

[0011] The second piston and a portion of the housing surround the human power chamber, and the human power chamber is located on a side of the second piston away from the first piston.

[0012] In an exemplary embodiment, the first piston, the second piston, and a portion of the housing located between the first piston and the second piston are arranged to form a normal pressure chamber;

[0013] A communicating hole is formed on the portion of the housing between the first piston and the second piston.

[0014] In an exemplary embodiment, a guide portion is disposed on one of the first piston and the second piston, and a matching portion is disposed on the other piston, and the guide portion and the matching portion are disposed opposite to each other.

[0015] In an exemplary embodiment, a first elastic member is disposed in the voltage chamber, one end of the first elastic member abuts against the first piston, and the other end of the first elastic member abuts against the housing;

[0016] A second elastic member is disposed in the normal pressure chamber, one end of the first elastic member abuts against the first piston, and the other end of the first elastic member abuts against the second piston;

[0017] The elastic coefficient of the second elastic member is greater than that of the first elastic member.

[0018] In an exemplary embodiment, the shell includes a control block body and a base, a cavity is provided in the control block body, the cavity extends axially to the end face of the control block body, and the base is installed on the end face of the control block body so that the cavity forms a closed structure.

[0019] In an exemplary embodiment, the manual master cylinder includes a master cylinder body, a brake push rod, and a third piston;

[0020] The main cylinder body is provided with an accommodating cavity, and the first end of the brake push rod extends into the accommodating cavity; the third piston is located in the accommodating cavity and abuts against the first end of the brake push rod;

[0021] The third piston and a portion of the master cylinder body are arranged to form the brake chamber.

[0022] In an exemplary embodiment, the braking system further includes a first pressure sensor or a first displacement sensor, and the first pressure sensor or the first displacement sensor is configured to detect the thrust of the brake push rod.

[0023] The first pressure sensor or the first displacement sensor is disposed between the brake push rod and the third piston, or the first pressure sensor or the first displacement sensor is disposed between the brake push rod and the brake pedal.

[0024] In an exemplary embodiment, the braking system further includes a second displacement sensor disposed in the housing, and the second displacement sensor is configured to detect the displacement of the first piston.

[0025] The embodiment of the present application also provides a vehicle, and the vehicle includes the aforementioned braking system.

[0026] Compared with some technologies, the present application has the following beneficial effects:

[0027] For the braking system provided by the embodiment of the present application, when the user steps on the pedal to drive the brake push rod for braking, at the same time, the pressure provided by the brake fluid in the voltage chamber is balanced with the pressure in the brake chamber to simulate the foot feeling and provide a suitable braking foot feeling for the user. The pressure provided by the brake fluid in the voltage chamber can be adjusted by the control center to achieve different foot feeling curves, which are applied to different scenarios and meet the different needs of users. The braking system provided by the embodiment of the present application simulates the foot feeling in the form of "foot feeling force simulator + manual master cylinder" through the above pressure balance method, simplifies the structure of the manual master cylinder, reduces the manufacturing process requirements, reduces the overall manufacturing cost of the braking system, improves the working reliability of the braking system, improves the foot feeling simulation effect of the braking system and enriches the foot feeling simulation curve of the braking system.

[0028] The vehicle provided by the embodiment of the present application has the aforementioned braking system, which can provide a suitable braking foot feeling for the user and improve the driving experience of the user.

[0029] Other features and advantages of the present application will be described in the subsequent specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings are used to provide a further understanding of the technical solutions of the present application, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solutions of the present application, and do not constitute a limitation to the technical solutions of the present application.

[0031] Figure 1 Structural schematic of the braking system described in the embodiment of the present application Figure 1 ;

[0032] Figure 2 Structural schematic of the braking system according to the embodiment of the present application Figure 2 ;

[0033] Figure 3 Structural schematic of the foot feeling force simulator according to the embodiment of the present application

[0034] Illustration description:

[0035] 1 - Manual master cylinder, 11 - Braking chamber, 12 - Master cylinder body, 121 - Accommodating chamber, 13 - Braking push rod, 14 - Third piston, 2 - Foot feeling force simulator, 21 - Housing, 211 - Control block body, 212 - Base, 221 - First piston, 222 - Matching part, 223 - Second piston, 224 - Guide part, 23 - Manual force chamber, 24 - Voltage chamber, 25 - Atmospheric pressure chamber, 251 - Communication hole, 26 - First elastic member, 27 - Second elastic member, 3 - Electric master cylinder, 41 - Liquid storage tank, 42 - Second pressure sensor, 43 - Pedal, 51 - First pipeline, 52 - Second pipeline, 53 - Third pipeline Specific implementation manners

[0036] To make the objectives, technical solutions and advantages of the present application clearer and more understandable, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other arbitrarily

[0037] The embodiment of the present application provides a braking system. As Figures 1 to 3 shown, the braking system includes a manual master cylinder 1, a foot feeling force simulator 2 and an electric master cylinder 3. The manual master cylinder 1 includes a braking chamber 11. The foot feeling force simulator 2 includes a housing 21 and a partition member disposed in the housing 21. The partition member divides the interior of the housing 21 into a manual force chamber 23 and a voltage chamber 24. The manual force chamber 23 is communicated with the braking chamber 11. The hydraulic cavity of the braking chamber 11 and the electric master cylinder 3 is communicated with the end braking device. The hydraulic cavity of the electric master cylinder 3 is communicated with the voltage chamber 24. The pressure provided by the electric master cylinder 3 to the voltage chamber 24 is set to be balanced with the braking force provided by the manual master cylinder 1 to the manual force chamber 23

[0038] The manual master cylinder 1 and the foot feeling force simulator 2 cooperate to achieve the foot feeling simulation effect. After adding the foot feeling force simulator 2, the structure of the manual master cylinder 1 can be simplified, the manufacturing process requirements of the manual master cylinder 1 can be greatly reduced, and thus the manufacturing cost of the braking system can be reduced

[0039] When the driver steps on the brake, the brake push rod 13 compresses the manual master cylinder 1, and the braking force is transmitted to the brake chamber 11 of the manual master cylinder 1. The brake chamber 11 is connected to the manual chamber 23 of the pedal feel simulator 2. In other words, the pressure in the manual chamber 23 represents the braking force applied by the user. On the other side, the pressure in the voltage chamber 24 of the manual chamber 23 can be controlled by the control center to balance the pressure in the manual chamber 23 and form a resistance to simulate the pedal feel when braking. The control center can flexibly adjust and control the pressure value in the voltage chamber 24 to simulate various types of brake pedal feel curves without changing the hardware.

[0040] As Figure 1 shown, the end braking device is arranged at the four wheel positions; it should be understood that Figure 1 the pipelines on are shown as connected to the four wheels, which is a schematic representation. Substantially, the ends of the pipelines are connected to the brake calipers (or brake discs) at the four wheels, and the four brake calipers correspond to the four wheels respectively. Among them, FL represents the left front wheel, FR represents the right front wheel, RL represents the left rear wheel, and RR represents the right rear wheel.

[0041] The first pipeline 5121 is divided into two branches at the end, and the two branches are respectively connected to two of the above four brake calipers. A solenoid valve for controlling the on / off of the branch is arranged on each of the two branches; the second pipeline 5222 is similar to the first pipeline 5121.

[0042] In an exemplary embodiment, as Figure 1 shown, the hydraulic chamber of the electric master cylinder 3 is connected to the inlet of the voltage chamber 24 through the first pipeline 51. A first solenoid valve (i.e., solenoid valve 113) is arranged on the first pipeline 51; a second solenoid valve (i.e., solenoid valve 114) is arranged at the outlet of the voltage chamber 24; the opening degrees of the first solenoid valve and the second solenoid valve are adjustable to adapt to the pressure in the manual chamber 23.

[0043] The hydraulic chamber of the electric master cylinder 3 is connected to the voltage chamber 24 through the first pipeline 51 to supply brake fluid to the voltage chamber 24 to form the required pressure, balance with the manual chamber 23, and simulate the required pedal feel. A solenoid valve is arranged on the first pipeline 51 to control the on / off of the first pipeline 51.

[0044] A second solenoid valve is arranged at the outlet of the voltage chamber 24 to open or close the outlet of the voltage chamber 24. Through the cooperation of the first solenoid valve and the second solenoid valve, the amount and pressure of the brake fluid in the voltage chamber 24 are controlled to adapt to and balance the pressure in the manual chamber 23 and simulate the pedal feel when braking.

[0045] In an exemplary embodiment, as Figure 1As shown, the brake chamber 11 is connected to the terminal brake device through the second pipeline 52; the first pipeline 51 is connected to the second pipeline 52 through the third pipeline 53, so that the hydraulic chamber of the electric master cylinder 3 is connected to the terminal brake device.

[0046] The brake chamber 11 is connected to the terminal brake device through the second pipeline 52. When an unexpected situation occurs and causes the foot force simulator 2 and the electric master cylinder 3 to fail to work, the driver can still brake directly through the manual master cylinder 1: the braking force applied by the driver to the brake push rod 13 is transmitted to the brake chamber 11, and the brake fluid in the brake chamber 11 enters the terminal brake device through the second pipeline 52 to achieve braking of the vehicle.

[0047] The electric master cylinder 3 is connected to the terminal brake device, and can provide auxiliary braking force when the driver brakes, so as to improve the braking effect and enhance the user's driving experience.

[0048] The first pipeline 51 is connected to the second pipeline 52 through the third pipeline 53 to minimize the pipeline length; of course, the electric master cylinder 3 can also lead out a separate pipeline to communicate with the terminal brake device.

[0049] In an exemplary embodiment, if Figure 3 As shown, the separator includes a first piston 221 and a second piston 223. The first piston 221 and a part of the shell 21 are arranged to form a voltage chamber 24, and the voltage chamber 24 is located on the side of the first piston 221 away from the second piston 223; the second piston 223 and a part of the shell 21 are arranged to form a manpower chamber 23, and the manpower chamber 23 is located on the side of the second piston 223 away from the first piston 221.

[0050] The first piston 221 and the second piston 223 may be directly abutted and matched, or a buffer member may be provided between the two for abutment and matching.

[0051] The pressure of the voltage chamber 24 and the manpower chamber 23 are applied to the first piston 221 and the second piston 223 respectively, so that the first piston 221 and the second piston 223 move left and right to reach a balanced position, so as to achieve a suitable braking feel.

[0052] A sealing member may be provided on the outer circumferential surface of the first piston 221 and the second piston 223 to improve the sealing performance of the first piston 221 and the second piston 223. The sealing member may be a leather cup.

[0053] In an exemplary embodiment, if Figure 3 As shown, the first piston 221 , the second piston 223 , and the portion of the housing 21 between the first piston 221 and the second piston 223 surround and form a normal pressure chamber 25 ; a connecting hole 251 is opened on the portion of the housing 21 between the first piston 221 and the second piston 223 .

[0054] The first piston 221, the second piston 223, and a part of the housing 21 located between the first piston 221 and the second piston 223 enclose an annular atmospheric pressure chamber 25. That is, the atmospheric pressure chamber 25 is annularly communicated with the outside through the communication hole 251 and keeps consistent with the outside ambient air pressure. When the volume of the atmospheric pressure chamber 25 changes, the internal pressure is always consistent with the outside environment, avoiding resistance to the sliding of the first piston 221 and the second piston 223.

[0055] In addition, the atmospheric pressure chamber 25 can also be communicated with the liquid storage tank 41. In other words, the atmospheric pressure chamber 25 is filled with brake fluid, but the brake fluid pressure in the atmospheric pressure chamber 25 is relatively low. When the volume of the atmospheric pressure chamber 25 changes, the pressure in the atmospheric pressure chamber 25 is always consistent with the pressure in the liquid storage tank 41, avoiding resistance to the sliding of the first piston 221 and the second piston 223. Connecting the atmospheric pressure chamber 25 with the liquid storage tank 41 reduces the sealing requirements at the first piston 221 and the second piston 223. Even if the sealing performance at the first piston 221 and the second piston 223 is relatively low, after a small amount of brake fluid flows into the atmospheric pressure chamber 25, it is still communicated with the liquid storage tank 41, and there will be no oil leakage in the pedal force simulator 2.

[0056] In an exemplary embodiment, as Figure 3 shown, a guiding portion 224 is provided on one of the first piston 221 and the second piston 223, and a mating portion 222 is provided on the other, and the guiding portion 224 and the mating portion 222 are arranged facing each other.

[0057] Setting a guiding structure on the first piston 221 and the second piston 223 has a guiding effect on the movement of both the first piston 221 and the second piston 223, making the movement of the first piston 221 and the second piston 223 smoother.

[0058] The guiding portion 224 can be a columnar section extending along the axis, and the mating portion 222 can be a groove matching the shape of the guiding portion 224.

[0059] In an exemplary embodiment, as Figure 3 shown, a first elastic member 26 is provided in the voltage chamber 24. One end of the first elastic member 26 abuts against the first piston 221, and the other end abuts against the housing 21; a second elastic member 27 is provided in the atmospheric pressure chamber 25. One end of the first elastic member 26 abuts against the first piston 221, and the other end abuts against the second piston 223; the elastic coefficient of the second elastic member 27 is greater than that of the first elastic member 26.

[0060] The first elastic member 26 is located in the voltage chamber 24 and can provide the power for the first piston 221 to move towards the second piston 223. The first elastic member 26 can be a spring.

[0061] The second elastic member 27 is disposed in the normal pressure chamber 25 and abuts against the first piston 221 and the second piston 223 respectively, which can prevent the first piston 221 and the second piston 223 from directly contacting rigidly and avoid giving the user the feeling that "the brake cannot be depressed at all".

[0062] In an exemplary embodiment, as Figure 3 shown, the housing 21 includes a control block body 211 and a base 212. A cavity is provided in the control block body 211, and the cavity extends axially to the end face of the control block body 211. The base 212 is installed on the end face of the control block body 211 to form a closed structure for the cavity.

[0063] The housing 21 can be composed of two parts, namely the control block body 211 and the base 212. The housing 21 is set in a split form, which is convenient for processing and avoids the manufacturing cost of the housing 21 being too high due to the complex internal cavity structure.

[0064] In an exemplary embodiment, as Figure 1 shown, the manual master cylinder 1 includes a master cylinder body 12, a brake push rod 13, and a third piston 14; a receiving cavity 121 is provided in the master cylinder body 12, and the first end of the brake push rod 13 extends into the receiving cavity 121; the third piston 14 is located in the receiving cavity 121 and abuts against the first end of the brake push rod 13; the third piston 14 and a part of the master cylinder body 12 enclose to form a brake cavity 11.

[0065] When the user steps on the pedal 43, the pedal 43 pushes the brake push rod 13, and the brake push rod 13 pushes the third piston 14 to compress the brake cavity 11, and the brake fluid in the brake cavity 11 is discharged through the liquid outlet of the brake cavity 11.

[0066] A cavity, that is, the receiving cavity 121, is provided in the master cylinder body 12. The third piston 14 is provided in the receiving cavity 121 and encloses to form a brake cavity 11. The brake cavity 11 presses the brake fluid into the manual cavity 23 of the foot feeling force simulator 2.

[0067] It should be understood that two brake cavities 11 can be provided in the manual master cylinder 1. In other words, the number of the third pistons 14 can be set to two. As Figure 1 shown, the brake cavity 11 on the right side (i.e., close to the brake push rod 13) communicates with the manual cavity 23 of the foot feeling force simulator 2, so that the braking force of the driver can be transmitted to the manual cavity 23 faster.

[0068] During the movement of the two third pistons 14, the liquid return port of the brake cavity 11 will be blocked and closed by the third piston 14.

[0069] In an exemplary embodiment, the braking system further includes a first pressure sensor or a first displacement sensor, which is configured to detect the thrust of the brake push rod 13; the first pressure sensor or the first displacement sensor is disposed between the brake push rod 13 and the third piston 14, or the first pressure sensor or the first displacement sensor is disposed between the brake push rod 13 and the brake pedal 43.

[0070] A first pressure sensor is disposed between the brake push rod 13 and the third piston 14. The first pressure sensor can detect the magnitude of the force applied by the user stepping on the pedal 43, and then determine the stop position corresponding to the brake push rod 13, so as to form a foot feeling matching the force applied by the user.

[0071] In addition, the first pressure sensor here can also be replaced by a high-precision displacement sensor, that is, the aforementioned first displacement sensor. The thrust transmitted by the brake push rod 13 is indirectly obtained by detecting the displacement of the displacement rod in the displacement sensor. The installation position of the first pressure sensor can also be adjusted. For example, it can be disposed between the brake push rod 13 and the brake pedal 43.

[0072] In an exemplary embodiment, the braking system further includes a second displacement sensor disposed in the housing 21, and the second displacement sensor is configured to detect the displacement of the first piston 221.

[0073] The second displacement sensor is used to detect the displacement of the first piston 221, and further used as a basis for determining the on / off state of subsequent pipelines.

[0074] In addition, the braking system provided by the embodiment of the present application may further include:

[0075] A liquid storage tank 41 to replenish brake fluid into the braking system when needed; a pedal 43, the user steps on the pedal 43 to push the brake push rod 13; a motor assembly, connected to the electric master cylinder 3, to provide power for the operation of the electric master cylinder 3; a brake caliper assembly (not shown in the figure), used to decelerate the vehicle to achieve braking.

[0076] The solenoid valves (101), (102), (103), (104), (109), (110), (113), (114) are normally closed solenoid valves when powered off, and the solenoid valves (105), (106), (107), (108), (111), (112), (115) are normally open solenoid valves when powered off.

[0077] The operation mode of the braking system is described below by taking several working conditions of the braking system as examples:

[0078] I. Normal braking:

[0079] The driver steps on the brake pedal 43, pushes the brake push rod 13, compresses the first pressure sensor, and transmits the pressure signal detected by the first pressure sensor to the control center. The control center outputs a signal to control the operation of the electric master cylinder 3 so that the electric master cylinder 3 reaches the brake fluid pressure required during calibration. The flow pipeline of the brake fluid in this step is as follows: Figure 1 and Figure 2 shown.

[0080] Solenoid valves 101, 102, 103, 104, 111, 112, 113, 114 are closed, and solenoid valves 105, 106, 107, 108, 109, 110, 115 are opened. In the initial stage of operation, the solenoid valve 113 is slightly opened, that is, the opening is small.

[0081] The driver steps on the brake pedal 43, pushing the piston of the manual master cylinder 1 (i.e., the third piston 14) to compress the brake fluid. The second pressure sensor 42 detects the brake fluid pressure, and the pressure signal is transmitted to the control center. The control center controls the motor to generate the brake fluid pressure required for calibration. The fluid pressure generated by the electric master cylinder 3 passes through the solenoid valve 109 (and 110) - solenoid valves 105, 106 (and 107, 108) - the vehicle brake wheel cylinder, and the wheel cylinder brakes the brake disc. The terminal brake device may include a vehicle brake wheel cylinder and a brake disc.

[0082] The second displacement sensor detects the displacement of the first piston 221. When it reaches the preset position, the control center adjusts the brake fluid pressure in the voltage chamber 24 by controlling the opening and closing or the specific opening size of the solenoid valve 113 and the solenoid valve 114, thereby controlling the position of the first piston 221 in the foot feel force simulator 2, that is, controlling the compression distance of the first elastic member 26, thereby realizing the foot feel of the driver under this size of pedaling force; according to the previous calibration of different pedaling forces of the driver, there are different compression distances of the first elastic member 26, thereby realizing different foot feels.

[0083] The pressure signal detected by the first pressure sensor is transmitted to the control center, and the control center outputs a signal to control the electric master cylinder 3 to work so that the brake fluid pressure required during calibration is reached. The control center controls the on and off of the solenoid valves 101, 102, 103, 104, 105, 106, 107, and 108 to realize the functions of ABS, EBD, ESP, etc., which will not be repeated here.

[0084] In addition, the control center can directly control the motor assembly and all valves without the driver stepping on the brake pedal 43, thereby realizing the functions of TCS and ACC. That is, without the user stepping on the brake with their foot, when the vehicle detects an obstacle through a radar or sensor, it can control the electric master cylinder 3 to achieve automatic braking. For example, the controller controls the electric master cylinder 3 to generate the required braking force. Solenoid valves 101, 102, 103, 104, 111, 112, 113, 114 are closed, and solenoid valves 105, 106, 107, 108, 109, 110, 115 are opened. The brake fluid enters the voltage chamber 24, thereby realizing the required function.

[0085] II. Failure mode braking (or braking when the vehicle has no power):

[0086] In the standby state or in the vehicle power failure mode, solenoid valves 101, 102, 103, 104, 109, 110, 113, 114 are in the closed state, and solenoid valves 105, 106, 107, 108, 111, 112, 115 are in the open state. When the driver steps on the brake pedal 43, the two pistons of the manual master cylinder 1 are compressed, and the two pistons compress the liquid in their respective pipelines; one path passes through the solenoid valve 111, solenoid valves 105, 106 to the wheel cylinder, and the wheel cylinder compresses the brake shoe to brake the brake disc (wheel); then the pressure is released through the solenoid valves 103, 104, or the driver releases the brake pedal 43 to release the pressure; the other path passes through the solenoid valve 112, solenoid valves 107, 108 to the wheel cylinder, and the wheel cylinder compresses the brake shoe to brake the brake disc (wheel); then the pressure is released through the solenoid valves 102, 101, or the driver releases the brake pedal 43 to release the pressure. In this working condition, the foot feel force simulator 2 does not work, the solenoid valves 113, 114 are closed, and the voltage chamber 24 of the foot feel sensor is filled with brake fluid; the brake fluid of the manual master cylinder 1 reaches the manual chamber 23, pushing the second piston 223 to compress the second elastic element, but unable to push the first piston 221; and the elastic coefficient of the compressed second elastic element is large and the total stroke is small, so the compressed distance is also very small.

[0087] Through calibration, in different modes, the driver's stepping force detected by the first pressure sensor corresponds to different displacements of the second piston 223 to generate different braking foot feelings and form a variety of foot feel curves.

[0088] The braking system provided by the embodiment of the present application has a low manufacturing cost. By redesigning the schematic diagram, the number of solenoid valves used is reduced; and the reliability of components is improved; through the cooperation of the physical foot feel force simulator 2 device and the manual master cylinder 1, the structure of the manual master cylinder 1 is simplified, the manufacturing cost of the entire braking system is reduced, and different foot feelings are output by using the method of software control (control center control) + manual master cylinder 1 + foot feel force simulator 2, improving the application range of the braking system.

[0089] The same braking system can simulate multiple pedal feels to match different driving modes of the vehicle or for the driver to subjectively select a mode suitable for the driver; moreover, the same braking system can also be installed on different vehicle models to achieve different pedal feel curves required by different manufacturers.

[0090] An embodiment of the present application also provides a vehicle, which includes the aforementioned braking system.

[0091] The vehicle provided by the embodiment of the present application, having the aforementioned braking system, can provide a suitable braking pedal feel for the user and improve the user's driving experience.

[0092] In the description of the present application, it should be noted that the orientation or positional relationship indicated by "upper", "lower", "one end", "one side", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the structure referred to has a specific orientation, is constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0093] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the terms "connection", "assembly", "installation" should be understood in a broad sense. For example, the term "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0094] The embodiments described in the present application are exemplary rather than restrictive, and it is obvious to those of ordinary skill in the art that there can be more embodiments and implementation solutions within the scope covered by the embodiments described in the present application. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically restricted, any feature or element of any embodiment can be combined with any other feature or element in any other embodiment, or can replace any other feature or element in any other embodiment.

[0095] This application includes and contemplates combinations with features and elements known to those of ordinary skill in the art. The disclosed embodiments, features, and elements of this application may also be combined with any conventional features or elements to form unique technical solutions defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other technical solutions to form another unique technical solution defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in this application can be implemented alone or in any suitable combination. Thus, the embodiments are not subject to other limitations except those made in accordance with the appended claims and their equivalents. In addition, various modifications and changes can be made within the scope of protection of the appended claims.

Claims

1. A braking system, characterized in that, It comprises a human-powered master cylinder, a foot-feeling force simulator and an electric master cylinder, wherein the human-powered master cylinder comprises a brake chamber, the foot-feeling force simulator comprises a shell and a partition arranged in the shell, the partition divides the shell into a human-powered chamber and a voltage chamber, the human-powered chamber is communicated with the brake chamber; the brake chamber and the hydraulic chamber of the electric master cylinder are communicated with the terminal brake device; The hydraulic chamber of the electric master cylinder is in communication with the voltage chamber, and the pressure provided by the electric master cylinder to the voltage chamber is set to be balanced with the braking force provided by the human master cylinder to the human chamber; The hydraulic chamber of the electric master cylinder is connected to the inlet of the voltage chamber through a first pipeline, and a first solenoid valve is arranged on the first pipeline; a second solenoid valve is arranged at the outlet of the voltage chamber; the openings of the first solenoid valve and the second solenoid valve are adjustable to adapt to the pressure in the human power chamber; The separator comprises a first piston and a second piston, the first piston and a part of the housing are arranged to form the voltage chamber, and the voltage chamber is located on a side of the first piston away from the second piston; The second piston and a part of the housing are arranged to form the human power chamber, and the human power chamber is located on a side of the second piston away from the first piston; The first piston, the second piston, and a portion of the housing located between the first piston and the second piston are arranged to form a normal pressure chamber; A communicating hole is formed on the portion of the housing between the first piston and the second piston; A first elastic member is arranged in the voltage chamber, one end of the first elastic member abuts against the first piston, and the other end abuts against the shell; a second elastic member is arranged in the normal pressure chamber, one end of the second elastic member abuts against the first piston, and the other end abuts against the second piston; the elastic coefficient of the second elastic member is greater than the coefficient of the first elastic member.

2. The braking system according to claim 1, characterized in that, The brake chamber is communicated with the terminal brake device through a second pipeline; the first pipeline is communicated with the second pipeline through a third pipeline, so that the hydraulic chamber of the electric master cylinder is communicated with the terminal brake device.

3. The braking system according to claim 1, characterized in that, A guide portion is disposed on one of the first piston and the second piston, and a matching portion is disposed on the other piston, and the guide portion and the matching portion are disposed opposite to each other.

4. The braking system according to any one of claims 1 to 3, characterized in that, The shell includes a control block body and a base. A cavity is arranged in the control block body. The cavity extends axially to the end surface of the control block body. The base is installed on the end surface of the control block body so that the cavity forms a closed structure.

5. The braking system according to any one of claims 1 to 3, characterized in that, The human-powered master cylinder comprises a master cylinder body, a brake push rod, and a third piston; The main cylinder body is provided with an accommodating cavity, and the first end of the brake push rod extends into the accommodating cavity; the third piston is located in the accommodating cavity and abuts against the first end of the brake push rod; The third piston and a portion of the master cylinder body are arranged to form the brake chamber.

6. The braking system according to claim 5, characterized in that, It also includes a first pressure sensor or a first displacement sensor, wherein the first pressure sensor or the first displacement sensor is configured to detect the thrust of the brake push rod; The first pressure sensor or the first displacement sensor is disposed between the brake push rod and the third piston, or the first pressure sensor or the first displacement sensor is disposed between the brake push rod and the brake pedal.

7. The braking system according to claim 1 or 3, characterized in that, It further includes a second displacement sensor disposed in the housing, and the second displacement sensor is configured to detect the displacement of the first piston.

8. A vehicle, characterized in that, It includes a braking system according to any one of claims 1 to 7.

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