Exhaust method and device of electronic hydraulic brake system, vehicle and storage medium

Abstract

The embodiment of the invention provides an electronic hydraulic brake system exhaust method and device, a vehicle and a storage medium, and relates to the field of vehicle exhaust. The method comprises the steps that when an exhaust instruction for an electronic hydraulic brake system is received, the state of an electromagnetic valve set is controlled to change, a mechanical braking loop in the electronic hydraulic braking system and a first cavity corresponding to a main cylinder are exhausted, the state change of an electromagnetic valve set is controlled, a second cavity of the main cylinder and / or an electric cylinder are / is exhausted, the electronic hydraulic braking system comprises the main cylinder and the electric cylinder, and the main cylinder comprises the first cavity and the second cavity. By controlling the state of the electronic valve group of the electronic hydraulic braking system, the mechanical braking loop, the first cavity of the main cylinder, the electric cylinder and the second cavity of the main cylinder can be exhausted, the electronic hydraulic braking system can be exhausted without additional exhaust equipment, the exhaust cost is reduced, and the exhaust efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle exhaust, and in particular, to an exhaust method, device, vehicle and storage medium for an electronic hydraulic brake system. Background Art

[0002] With the continuous advancement of automobile technology, electronic hydraulic brake systems have gradually become an important part of modern automobiles due to their fast response speed and high control accuracy. Existing electronic hydraulic brake systems usually use vacuum filling during the exhaust process to ensure that the entire brake circuit is full of brake fluid and does not contain air. Specifically, this process involves connecting a vacuum pump to gradually evacuate the air in the brake system, and then injecting new brake fluid to remove the residual air in the system.

[0003] Although this method can effectively remove air, it also increases the cost of the exhaust operation because additional equipment is required to achieve the vacuum process. In addition, the operating steps of this method are relatively cumbersome and require professionals to strictly follow the prescribed steps, which makes the entire exhaust process time-consuming and increases labor costs. Therefore, although the exhaust method for the electronic hydraulic brake system in the prior art can ensure the normal operation of the brake system, it also brings about the problems of high cost and operational complexity. Summary of the invention

[0004] The purpose of the present application is to provide an electronic hydraulic brake system exhaust method, device, vehicle and storage medium, which can simplify the exhaust process of the electronic hydraulic brake system and improve the exhaust efficiency.

[0005] In order to achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

[0006] In a first aspect, an embodiment of the present application provides an electronic hydraulic brake system exhaust method, which is applied to a vehicle controller, wherein the vehicle controller is communicatively connected to the electronic hydraulic brake system, and the solenoid valve group of the electronic hydraulic brake system is in an initial state, and the method includes:

[0007] When receiving an exhaust command for the electronic hydraulic brake system, controlling the state change of the solenoid valve group to exhaust the mechanical brake circuit and the first chamber corresponding to the master cylinder in the electronic hydraulic brake system;

[0008] The state change of the solenoid valve group is controlled to exhaust the second chamber of the master cylinder and / or the electric cylinder, wherein the electronic hydraulic brake system includes a master cylinder and an electric cylinder, wherein the master cylinder includes a first chamber and a second chamber.

[0009] In an optional embodiment, when receiving an exhaust command for the electronic hydraulic brake system, the step of controlling the state change of the solenoid valve group to exhaust the mechanical brake circuit and the first chamber corresponding to the master cylinder in the electronic hydraulic brake system includes:

[0010] When receiving an exhaust command for the electronic hydraulic brake system, the PSV1 valve, the CSV1 valve and the SSV valve are controlled to open, wherein the electronic hydraulic brake system includes a mechanical brake circuit and a piston isolation valve, the mechanical brake circuit includes a circuit isolation valve, the circuit isolation valve is used to block the hydraulic pressure of the master cylinder, the piston isolation valve is used to block the hydraulic pressure of the electric cylinder, the piston isolation valve includes a PSV1 valve, the circuit isolation valve includes a CSV1 valve, the CSV1 valve is connected to the PSV1 valve through an oil circuit, and the SSV valve is connected to the master cylinder;

[0011] Controlling the TSV valve to close, wherein one end of the TSV valve is connected to the first chamber, and the other end of the TSV valve is connected to the oil pot module;

[0012] Controlling the electric cylinder to establish a first pressure so that air in the mechanical brake circuit of the electronic hydraulic brake system enters the first chamber, wherein the first pressure is injected into the mechanical brake circuit through the PSV1 valve, the CSV1 valve, and the SSV valve;

[0013] The TSV valve is controlled to open so that the gas in the first chamber is exhausted.

[0014] In an optional embodiment, the step of controlling the state change of the solenoid valve group to exhaust the electric cylinder includes:

[0015] Control the CSV1 valve to close.

[0016] Controlling the piston of the electric cylinder to retract to the terminal zero position;

[0017] Control the OV1 valve and the OV2 valve to open so that the air in the electric cylinder enters the oil tank through the OV1 valve and the OV2 valve, wherein the electronic hydraulic brake system includes the OV1 valve and the OV2 valve, one end of the OV1 valve and the OV2 valve is connected to the oil tank module, and the other end of the OV1 valve and the OV2 valve is connected to the PSV1 valve.

[0018] In an optional embodiment, the step of controlling the state change of the solenoid valve group to exhaust the second chamber of the master cylinder and the electric cylinder includes:

[0019] Control CSV1 valve and PSV1 valve to close;

[0020] Controlling the piston of the electric cylinder to retract to the terminal zero position;

[0021] The CSV2 valve and the PSV2 valve are controlled to open so as to discharge the air from the second chamber and the master cylinder, wherein the circuit isolation valve further includes a CSV2 valve, and the piston isolation valve further includes a PSV2 valve, one end of the CSV2 valve is connected to the PSV2 valve, and the other end of the CSV2 valve is connected to the second chamber.

[0022] In an optional embodiment, the step of controlling the state change of the solenoid valve group to exhaust the second chamber of the master cylinder and the electric cylinder includes:

[0023] Controlling the CSV1 valve to close;

[0024] Controlling the piston of the electric cylinder to retract to the terminal zero position;

[0025] Control the OV1 valve, OV2 valve, CSV2 valve and PSV2 valve to open so that the air in the electric cylinder and the second chamber is discharged, wherein the electronic hydraulic brake system includes the OV1 valve and the OV2 valve, one end of the OV1 valve and the OV2 valve are connected to the oil pot module, and the other ends of the OV1 valve and the OV2 valve are connected to the PSV1 valve, the circuit isolation valve also includes a CSV2 valve, and the piston isolation valve also includes a PSV2 valve, one end of the CSV2 valve is connected to the PSV2 valve, and the other end of the CSV2 valve is connected to the second chamber.

[0026] In an optional embodiment, the method further comprises:

[0027] Receiving a user's touch operation on the exhaust button;

[0028] Based on the touch operation, an exhaust command for the electronic hydraulic brake system is generated.

[0029] In an optional embodiment, the method further comprises:

[0030] When it is detected that the assembly of the electronic hydraulic brake system is replaced, an exhaust command is sent to the electronic hydraulic brake system.

[0031] In a second aspect, an embodiment of the present application provides an electronic hydraulic brake system exhaust device, which is applied to a vehicle controller, wherein the vehicle controller is communicatively connected to the electronic hydraulic brake system, and the solenoid valve group of the electronic hydraulic brake system is in an initial state, and the device includes:

[0032] A first exhaust module, configured to control the state change of the solenoid valve group to exhaust the mechanical brake circuit and the first chamber corresponding to the master cylinder in the electronic hydraulic brake system when receiving an exhaust command for the electronic hydraulic brake system;

[0033] The second exhaust module is used to control the state change of the solenoid valve group to exhaust the second chamber of the master cylinder and / or the electric cylinder, wherein the electronic hydraulic brake system includes a master cylinder and an electric cylinder, wherein the master cylinder includes a first chamber and a second chamber.

[0034] In a third aspect, an embodiment of the present application provides a vehicle, including a vehicle controller and a memory, wherein the memory stores a computer program that can be executed by the vehicle controller, and the vehicle controller can execute the computer program to implement the step of exhausting the electronic hydraulic brake system.

[0035] In a fourth aspect, an embodiment of the present application provides a storage medium on which a computer program is stored, and when the computer program is executed by a vehicle controller, the steps of the electronic hydraulic brake system exhaust method are implemented.

[0036] This application has the following beneficial effects:

[0037] The present application controls the state change of the solenoid valve group to exhaust the first chamber corresponding to the mechanical brake circuit and the master cylinder in the electronic hydraulic brake system when receiving the exhaust command for the electronic hydraulic brake system, and controls the state change of the solenoid valve group to exhaust the second chamber of the master cylinder and / or the electric cylinder, wherein the electronic hydraulic brake system includes the master cylinder and the electric cylinder, wherein the master cylinder includes the first chamber and the second chamber. By controlling the state of the electronic valve group of the electronic hydraulic brake system, exhaust can be achieved for the mechanical brake circuit and the first chamber of the master cylinder, the electric cylinder and the second chamber of the master cylinder, and the electronic hydraulic brake system can be exhausted without additional exhaust equipment, thereby reducing exhaust costs and improving exhaust efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 A schematic diagram of an electronic hydraulic brake system provided in an embodiment of the present application;

[0040] Figure 2 A block diagram of a vehicle provided in an embodiment of the present application;

[0041] Figure 3 One of the flow charts of an electronic hydraulic brake system exhaust method provided in an embodiment of the present application;

[0042] Figure 4 A second flow chart of an electronic hydraulic brake system exhaust method provided in an embodiment of the present application;

[0043] Figure 5 A third flow chart of an electronic hydraulic brake system exhaust method provided in an embodiment of the present application;

[0044] Figure 6 A fourth flow chart of an electronic hydraulic brake system exhaust method provided in an embodiment of the present application;

[0045] Figure 7 A fifth flow chart of an electronic hydraulic brake system exhaust method provided in an embodiment of the present application;

[0046] Figure 8 A structural block diagram of an electronic hydraulic brake system exhaust device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0049] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0050] In the description of the present application, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, it is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0051] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0052] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] The integrated electronic hydraulic braking system includes the functions of three major braking products: EHB (Electronic Hydraulic Brake), EPB (Electronic Park Brake), and ESC (Electronic Stability Control). It can achieve high-quality basic braking, wire-controlled braking, wire-controlled parking, stability control and other functions, and can serve as a chassis domain controller to fully take over the wire-controlled chassis.

[0054] like Figure 1As shown, it is a schematic diagram of an electronic hydraulic brake system, which includes an oil pot module 10, a wheel end module 20, a main brake circuit 30 and a mechanical brake circuit 40. The oil pot module includes a small oil pot 11 and a large oil pot 12. The main brake circuit 30 includes an electric cylinder 31 and a piston isolation valve. The piston isolation valve includes a PSV1 valve and a PSV2 valve. The pressure buildup of the electric cylinder 31 is achieved by driving the piston movement in the electric cylinder by a motor. The wheel end module 20 includes an IV1 valve, an IV2 valve, an IV3 valve, an IV4 valve, an OV1 valve, an OV2 valve, an OV3 valve and an OV4 valve. The IV1 valve is connected to the OV1 valve, the OV1 valve is connected to the first wheel end, the IV2 valve is connected to the OV2 valve, and the OV2 valve is connected to the second wheel end. The IV3 valve is connected to the OV3 valve, the OV3 valve is connected to the third wheel end, the IV4 valve is connected to the OV4 valve, and the OV4 valve is connected to the fourth wheel end. The PSV1 valve can be connected to the first wheel end and the second wheel end, the PSV2 valve can be connected to the third wheel end and the fourth wheel end, the PSV1 valve can also be connected to the first wheel end and the third wheel end, and the PSV2 valve is connected to the second wheel end and the fourth wheel end.

[0055] Figure 1 It is shown that the PSV1 valve of the main brake circuit 30 is connected to the IV1 valve and the IV2 valve through the oil circuit, and the PSV2 valve of the main brake circuit 30 is connected to the IV3 valve and the IV4 valve through the oil circuit. When the solenoid valve in the mechanical brake circuit 40 is in a closed state and the PSV1 valve and the PSV2 valve are in an open state, the electric cylinder 31 provides hydraulic pressure to the IV1 valve, the IV2 valve, the IV3 valve and the IV4 valve.

[0056] The mechanical brake circuit 40 includes a master cylinder 41 and a circuit isolation valve, the circuit isolation valve includes a CSV1 valve and a CSV2 valve, the electronic hydraulic brake system also includes an SSV valve and a TSV valve, the CSV1 valve, the CSV2 valve, the SSV valve and the TSV valve are respectively connected to the master cylinder, the CSV1 valve is connected to the first chamber 411 of the master cylinder 41, the CSV2 valve is connected to the second chamber 412 of the master cylinder 41, the second chamber 412 is connected to the oil pot module 10, the SSV valve is connected to the pedal simulation module 42, the pedal simulation module 42 is connected to the oil pot module 10 through the oil circuit, and the other end of the TSV valve is connected to the The oil tank module 10 is connected, the CSV1 valve is connected to the first wheel end assembly through the oil circuit, the CSV2 valve is connected to the IV3 valve and the IV4 valve through the oil circuit, when the CSV1 valve and the CSV2 valve are in the open state, that is, the CSV1 valve and the CSV2 valve allow flow to pass through, the PSV1 valve and the PSV2 valve are in the closed state, that is, the PSV1 valve and the PSV2 valve do not allow flow to pass through, the master cylinder 41 provides hydraulic pressure to the IV1 valve, the IV2 valve, the IV3 valve and the IV4 valve, the master cylinder 41 is connected to the brake pedal 43, and the master cylinder 41 is pressurized by stepping on the brake pedal 43.

[0057] It should be noted that the CSV1 valve, CSV2 valve, IV1 valve, IV2 valve, IV3 valve and IV4 valve are normally open valves, that is, when the CSV1 valve, CSV2 valve, IV1 valve, IV2 valve, IV3 valve and IV4 valve are powered on, the CSV1 valve, CSV2 valve, IV1 valve, IV2 valve, IV3 valve and IV4 valve are in a closed state, that is, a state in which flow is not allowed to pass, and when the CSV1 valve, CSV2 valve, IV1 valve, IV2 valve, IV3 valve and IV4 valve are powered off, the CSV1 valve, CSV2 valve, IV1 valve, IV2 valve, IV3 valve and IV4 valve are in an open state, that is, a state in which flow is allowed to pass. In the electronic hydraulic brake system, other solenoid valves except the above-mentioned CSV1 valve, CSV2 valve, IV1 valve, IV2 valve, IV3 valve and IV4 valve are normally closed valves.

[0058] After research, it was found that with the continuous advancement of automobile technology, the electronic hydraulic brake system has gradually become an important part of modern automobiles due to its fast response speed and high control accuracy. The existing electronic hydraulic brake system usually adopts the method of vacuum filling during the exhaust process to ensure that the entire brake circuit is full of brake fluid and does not contain air. Specifically, this process includes connecting a vacuum pump to gradually evacuate the air in the brake system, and then injecting new brake fluid to remove the residual air in the system.

[0059] Although this method can effectively remove air, it also increases the cost of the exhaust operation because additional equipment is required to achieve the vacuum process. In addition, the operating steps of this method are relatively cumbersome and require professionals to strictly follow the prescribed steps, which makes the entire exhaust process time-consuming and increases labor costs. Therefore, although the exhaust method for the electronic hydraulic brake system in the prior art can ensure the normal operation of the brake system, it also brings about the problems of high cost and operational complexity.

[0060] In view of the discovery of the above problems, the present embodiment provides an electronic hydraulic brake system exhaust method, device, vehicle and storage medium, which can exhaust the mechanical brake circuit and the first chamber corresponding to the master cylinder in the electronic hydraulic brake system by controlling the state change of the solenoid valve group when receiving the exhaust command for the electronic hydraulic brake system, and exhaust the second chamber of the master cylinder and / or the electric cylinder by controlling the state change of the solenoid valve group, wherein the electronic hydraulic brake system includes the master cylinder and the electric cylinder, wherein the master cylinder includes the first chamber and the second chamber. By controlling the state of the electronic valve group of the electronic hydraulic brake system, the mechanical brake circuit and the first chamber of the master cylinder, the electric cylinder and the second chamber of the master cylinder can be exhausted, and the electronic hydraulic brake system can be exhausted without additional exhaust equipment, thereby reducing the exhaust cost and improving the exhaust efficiency. The scheme provided by the present embodiment is described in detail below.

[0061] This embodiment provides a vehicle that can exhaust the electronic hydraulic brake system. Figure 2 , Figure 2 1 is a schematic diagram of the structure of the vehicle 100 provided in the embodiment of the present application. The vehicle 100 may also include Figure 2 More or fewer components as shown, or with Figure 2 Different configurations are shown. Figure 2 Each component shown in the figure can be implemented by hardware, software or a combination thereof.

[0062] The vehicle 100 includes an electronic hydraulic brake system exhaust device 110 , a memory 120 , and a vehicle controller 130 .

[0063] The components of the memory 120 and the vehicle controller 130 are electrically connected to each other directly or indirectly to achieve data transmission or interaction. For example, these components can be electrically connected to each other through one or more communication buses or signal lines. The electronic hydraulic brake system exhaust device 110 includes at least one software function module that can be stored in the memory 120 in the form of software or firmware or solidified in the operating system (OS) of the vehicle 100. The vehicle controller 130 is used to execute the executable modules stored in the memory 120, such as the software function modules and computer programs included in the electronic hydraulic brake system exhaust device 110.

[0064] The memory 120 may be, but is not limited to, a random access memory (RAM), a read only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electric erasable programmable read-only memory (EEPROM), etc. The memory 120 is used to store a program, and the vehicle controller 130 executes the program after receiving an execution instruction.

[0065] Please refer to Figure 3 , Figure 3 For application Figure 2 A flow chart of an electronic hydraulic brake system exhaust method for a vehicle 100 is shown, and the method including each step is described in detail below.

[0066] Applied to a vehicle controller, the vehicle controller is connected to the electronic hydraulic brake system for communication, and the solenoid valve group of the electronic hydraulic brake system is in an initial state, that is, the electronic valve groups of the electronic hydraulic brake system are all in a power-off state.

[0067] S201: When receiving an exhaust command for the electronic hydraulic brake system, controlling the state change of the solenoid valve group to exhaust the mechanical brake circuit in the electronic hydraulic brake system and the first chamber corresponding to the master cylinder.

[0068] S202: Control the state change of the solenoid valve group to exhaust the second chamber of the master cylinder and / or the electric cylinder.

[0069] The electronic hydraulic brake system includes a master cylinder and an electric cylinder, wherein the master cylinder includes a first chamber and a second chamber.

[0070] Exemplarily, when the wet parts of the electronic hydraulic brake system are replaced, it is determined that a venting command of the electronic hydraulic brake system is received.

[0071] Wet parts usually refer to those components that are in direct contact with liquids such as oil, coolant, brake fluid, etc. or work inside them. The design and manufacture of these components need to take special consideration of corrosion resistance, sealing and long-term stability to ensure reliable performance in liquid environments. Wet parts can be oil pumps, water-cooled radiators, oil pans, automatic transmission oil pumps, clutch assemblies, planetary gear sets, brake master cylinders, brake cylinders, brake hoses, water pumps, thermostats, coolant reservoirs, etc. When it is detected that the wet parts in the electronic hydraulic brake system have been replaced, the vehicle controller determines that an exhaust command has been received, and based on the exhaust command, the electronic hydraulic brake system is exhausted by controlling the state change of the solenoid valve group in the electronic hydraulic brake system.

[0072] When exhausting the electronic hydraulic brake system, you can first simulate the exhaust method in the driver's textbook to control the motor and solenoid valve of the electric cylinder, discharge the air in the first chamber of the master cylinder and the brake circuit into the oil pot, and then control the state change of the solenoid valve group to exhaust the second chamber of the master cylinder or the electric cylinder or the second chamber of the master cylinder and the electric cylinder.

[0073] In another example, a venting instruction for the electronic hydraulic brake system may be generated based on a touch operation of a venting button by a user and the touch operation.

[0074] When receiving an exhaust command for the electronic hydraulic brake system, the state of the solenoid valve group is controlled to change, and the mechanical brake circuit in the electronic hydraulic brake system and the first chamber corresponding to the master cylinder are exhausted. There are many implementation methods. In one implementation method, Figure 4 As shown, the following steps are included:

[0075] S301: When receiving an exhaust command for the electronic hydraulic brake system, control the PSV1 valve, the CSV1 valve and the SSV valve to open.

[0076] Among them, the electronic hydraulic braking system includes a mechanical braking circuit and a piston isolation valve. The mechanical braking circuit includes a circuit isolation valve. The circuit isolation valve is used to block the hydraulic pressure of the master cylinder. The piston isolation valve is used to block the hydraulic pressure of the electric cylinder. The piston isolation valve includes a PSV1 valve. The circuit isolation valve includes a CSV1 valve. The CSV1 valve is connected to the PSV1 valve through an oil circuit, and the SSV valve is connected to the master cylinder.

[0077] S302: Control the TSV valve to close.

[0078] One end of the TSV valve is connected to the first chamber, and the other end of the TSV valve is connected to the oil pot.

[0079] S303: Control the electric cylinder to establish a first pressure so that the air in the mechanical brake circuit of the electronic hydraulic brake system enters the first chamber.

[0080] The first pressure is injected into the mechanical brake circuit through the PSV1 valve, the CSV1 valve and the SSV valve.

[0081] S304: Control the TSV valve to open, so that the gas in the first chamber is exhausted.

[0082] like Figure 1 As shown, the electronic hydraulic braking system includes a mechanical braking circuit 40, the mechanical braking circuit includes a master cylinder 41 and a circuit isolation valve, the circuit isolation valve includes a CSV1 valve and a CSV2 valve, the mechanical active braking circuit 40 also includes an SSV valve and a TSV valve, a first end of the SSV valve is connected to a pedal simulation module, the other end of the SSV valve is connected to a first chamber 411 of the master cylinder, one end of the TSV valve is connected to the first chamber 411 of the master cylinder, and a second end of the TSV valve is connected to the oil tank module 10.

[0083] The electronic hydraulic brake system also includes a main brake circuit 30 and an electric cylinder 31. The main brake circuit 30 includes a piston isolation valve. The piston isolation valve includes a PSV1 valve and a PSV2 valve. The PSV1 valve and the PSV2 valve are respectively connected to the electric cylinder 31. The PSV1 valve and the PSV2 valve are used to seal the hydraulic pressure of the electric cylinder 31.

[0084] When the vehicle controller receives the exhaust command for the electronic hydraulic brake system, the PSV1 valve is energized to control the PSV1 valve to open, and the CSV1 valve is de-energized to control the CSV1 valve to open. The SSV is energized to control the SSV valve to open. Except for the PSV1 valve, CSV1 valve and SSV valve being opened, the other solenoid valve groups of the electronic hydraulic brake system are in the initial state.

[0085] When the PSV1 valve, the SSV valve, and the CSV1 valve are opened, the TSV valve is controlled to be closed so that when the electric cylinder 31 is building up pressure, the pressure will not be leaked to the oil pot module through the oil circuit.

[0086] When the PSV1 valve, SSV valve and CSV1 valve are opened and the TSV valve is closed, the motor that controls the electric cylinder rotates forward to establish a first pressure. Based on the first pressure, oil is drawn from the oil tank module to the electric cylinder, and the oil passes through the PSV1 valve and the CSV1 valve to the first chamber of the master cylinder, so that the air in the oil circuit also enters the first chamber. After the air enters the first chamber, the TSV valve is controlled to open so that the air can be discharged into the oil tank module, thereby exhausting the mechanical brake circuit and the first chamber.

[0087] There are many ways to control the state change of the solenoid valve group and exhaust the electric cylinder. In one implementation, Figure 5 As shown, the following steps are included:

[0088] S401: Control CSV1 valve to close.

[0089] S402: Control the piston of the electric cylinder to retract to the end zero position.

[0090] S403: Control the OV1 valve and the OV2 valve to open, so that the air in the electric cylinder enters the oil pot through the OV1 valve and the OV2 valve.

[0091] The electronic hydraulic brake system includes an OV1 valve and an OV2 valve, one end of the OV1 valve and the OV2 valve are connected to an oil tank, and the other end of the OV1 valve and the OV2 valve are connected to a PSV1 valve.

[0092] The CSV1 valve is energized to control the CSV1 valve to be in a closed state to prevent air from entering the first chamber that has been evacuated.

[0093] The motor of the electric cylinder is controlled to rotate in the opposite direction so that the piston returns to the end zero position. Since the PSV1 valve is connected to the OV1 valve and the OV2 valve respectively, the OV1 valve is connected to the oil pot module, and the OV2 valve is connected to the oil pot module, when the OV1 valve and the OV2 valve are opened, the oil circuits of the PSV1 valve and the OV1 valve and the oil circuits of the PSV1 valve and the OV2 valve are connected. At this time, the air in the electric cylinder can be discharged into the oil pot module through the PSV1 valve and the OV1 valve and the PSV1 valve and the OV2 valve to exhaust the electric cylinder.

[0094] There are many ways to control the state change of the solenoid valve group and exhaust the second chamber of the master cylinder and the electric cylinder. In one implementation, Figure 6 As shown, the following steps are included:

[0095] S501: Control CSV1 valve and PSV1 valve to close.

[0096] S502: Control the piston of the electric cylinder to retract to the end zero position.

[0097] S503: Control the CSV2 valve and the PSV2 valve to open so that the air in the second chamber can be discharged.

[0098] The loop isolation valve further includes a CSV2 valve, and the piston isolation valve further includes a PSV2 valve. One end of the CSV2 valve is connected to the PSV2 valve, and the other end of the CSV2 valve is connected to the second chamber.

[0099] The CSV1 valve is energized to control the CSV1 valve to close, and the PSV1 valve is de-energized to control the PSV1 valve to close to prevent air from entering the first exhausted chamber, and the motor of the electric cylinder is controlled to rotate in the opposite direction to control the piston of the electric cylinder to retreat to the end zero position.

[0100] The CSV2 valve is powered off to control the opening of the CSV2 valve, and the PSV2 valve is powered on to control the opening of the PSV2 valve, so that the air in the electric cylinder enters the second chamber through the PSV2 valve and the CSV2 valve. Since the second chamber is connected to the oil pot module, the air in the second chamber is discharged into the oil pot module.

[0101] In another implementation method of controlling the state change of the solenoid valve group to exhaust the second chamber of the master cylinder and the electric cylinder, as Figure 7 As shown, the following steps are included:

[0102] S601: Control CSV1 valve to close.

[0103] S602: Control the piston of the electric cylinder to retract to the end zero position.

[0104] S603: Control the OV1 valve, OV2 valve, CSV2 valve and PSV2 valve to open, so that the air in the electric cylinder and the second chamber can be discharged.

[0105] Among them, the electronic hydraulic braking system includes an OV1 valve and an OV2 valve, one end of the OV1 valve and the OV2 valve is connected to the oil tank module, and the other end of the OV1 valve and the OV2 valve is connected to the PSV1 valve, the circuit isolation valve also includes a CSV2 valve, and the piston isolation valve also includes a PSV2 valve, one end of the CSV2 valve is connected to the PSV2 valve, and the other end of the CSV2 valve is connected to the second chamber.

[0106] Based on the state change of the control solenoid valve group, the mechanical brake circuit in the electronic hydraulic brake system and the first chamber corresponding to the master cylinder are exhausted, that is, based on the opening of the PSV1 valve, the SSV valve, and the CSV1 valve, the CSV1 valve is controlled to be closed to prevent air from entering the exhausted first chamber. The motor of the electric cylinder is controlled to rotate in the opposite direction so that the piston returns to the end zero position, and the OV1 valve, OV2 valve, and PSV2 valve are powered on to control the opening of the OV1 valve, OV2 valve, and PSV2 valve, and the CSV2 valve is powered off to control the opening of the CSV2 valve, so that the air in the electric cylinder can be discharged into the oil pot module through the circuits of the PSV1 valve and the OV1 valve and the circuits of the PSV1 valve and the OV2 valve.

[0107] The CSV2 valve opens, allowing the air in the second chamber of the master cylinder to be discharged into the oiler module.

[0108] The second chamber of the master cylinder and the electric cylinder can be exhausted simultaneously in the above manner.

[0109] Please refer to Figure 8 The present application embodiment also provides a method for applying Figure 2 The electronic hydraulic brake system exhaust device 110 of the vehicle 100 includes:

[0110] A first exhaust module 111 is used to control the state change of the solenoid valve group to exhaust the mechanical brake circuit and the first chamber corresponding to the master cylinder in the electronic hydraulic brake system when receiving an exhaust command for the electronic hydraulic brake system;

[0111] The second exhaust module 112 is used to control the state change of the solenoid valve group to exhaust the second chamber of the master cylinder and / or the electric cylinder, wherein the electronic hydraulic brake system includes a master cylinder and an electric cylinder, wherein the master cylinder includes a first chamber and a second chamber.

[0112] The present application also provides a vehicle 100, which includes a vehicle controller 130 and a memory 120. The memory 120 stores computer executable instructions, and when the computer executable instructions are executed by the vehicle controller 130, the electronic hydraulic brake system exhaust method is implemented.

[0113] The embodiment of the present application further provides a storage medium, which stores a computer program. When the computer program is executed by the vehicle controller 130, the electronic hydraulic brake system exhaust method is implemented.

[0114] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to the multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or the flowchart, and the combination of boxes in the block diagram and / or the flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0115] In addition, each functional module in each embodiment of the present application can be integrated together to form an independent part, or each module can exist separately, or two or more modules can be integrated to form an independent part. If the function is implemented in the form of a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a disk or an optical disk.

[0116] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0117] The above are only various implementations of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for exhausting an electronic hydraulic brake system, characterized in that: Applied to a vehicle controller, the vehicle controller is in communication connection with an electronic hydraulic brake system, the solenoid valve group of the electronic hydraulic brake system is in an initial state, and the method comprises: When receiving an exhaust command for the electronic hydraulic brake system, controlling the state change of the solenoid valve group to exhaust the mechanical brake circuit and the first chamber corresponding to the master cylinder in the electronic hydraulic brake system; The state change of the solenoid valve group is controlled to exhaust the second chamber of the master cylinder and / or the electric cylinder, wherein the electronic hydraulic brake system includes a master cylinder and an electric cylinder, wherein the master cylinder includes a first chamber and a second chamber.

2. The method according to claim 1, characterized in that The step of controlling the state change of the solenoid valve group to exhaust the mechanical brake circuit and the first chamber corresponding to the master cylinder in the electronic hydraulic brake system when receiving the exhaust command for the electronic hydraulic brake system comprises: When receiving an exhaust command for the electronic hydraulic brake system, the PSV1 valve, the CSV1 valve and the SSV valve are controlled to open, wherein the electronic hydraulic brake system includes a mechanical brake circuit and a piston isolation valve, the mechanical brake circuit includes a circuit isolation valve, the circuit isolation valve is used to block the hydraulic pressure of the master cylinder, the piston isolation valve is used to block the hydraulic pressure of the electric cylinder, the piston isolation valve includes a PSV1 valve, the circuit isolation valve includes a CSV1 valve, the CSV1 valve is connected to the PSV1 valve through an oil circuit, and the SSV valve is connected to the master cylinder; Controlling the TSV valve to close, wherein one end of the TSV valve is connected to the first chamber, and the other end of the TSV valve is connected to the oil pot module; Controlling the electric cylinder to establish a first pressure so that air in the mechanical brake circuit of the electronic hydraulic brake system enters the first chamber, wherein the first pressure is injected into the mechanical brake circuit through the PSV1 valve, the CSV1 valve, and the SSV valve; The TSV valve is controlled to open so that the gas in the first chamber is exhausted.

3. The method according to claim 2, characterized in that The step of controlling the state change of the solenoid valve group to exhaust the electric cylinder includes: Controlling the CSV1 valve to close; Controlling the piston of the electric cylinder to retract to the terminal zero position; Control the OV1 valve and the OV2 valve to open so that the air in the electric cylinder enters the oil tank through the OV1 valve and the OV2 valve, wherein the electronic hydraulic brake system includes the OV1 valve and the OV2 valve, one end of the OV1 valve and the OV2 valve is connected to the oil tank module, and the other end of the OV1 valve and the OV2 valve is connected to the PSV1 valve.

4. The method according to claim 2, characterized in that: The step of controlling the state change of the solenoid valve group to exhaust the second chamber of the master cylinder and the electric cylinder comprises: Control the CSV1 valve and PSV1 valve to close; Controlling the piston of the electric cylinder to retract to the terminal zero position; The CSV2 valve and the PSV2 valve are controlled to open so as to discharge the air from the second chamber and the electric cylinder, wherein the circuit isolation valve further includes a CSV2 valve, and the piston isolation valve further includes a PSV2 valve, one end of the CSV2 valve is connected to the PSV2 valve, and the other end of the CSV2 valve is connected to the second chamber.

5. The method according to claim 2, characterized in that: The step of controlling the state change of the solenoid valve group to exhaust the second chamber of the master cylinder and the electric cylinder comprises: Controlling the CSV1 valve to close; Controlling the piston of the electric cylinder to retract to the terminal zero position; Control the OV1 valve, OV2 valve, CSV2 valve and PSV2 valve to open so that the air in the electric cylinder and the second chamber is discharged, wherein the electronic hydraulic brake system includes the OV1 valve and the OV2 valve, one end of the OV1 valve and the OV2 valve are connected to the oil pot module, and the other ends of the OV1 valve and the OV2 valve are connected to the PSV1 valve, the circuit isolation valve also includes a CSV2 valve, and the piston isolation valve also includes a PSV2 valve, one end of the CSV2 valve is connected to the PSV2 valve, and the other end of the CSV2 valve is connected to the second chamber.

6. The method according to claim 1, characterized in that The method further comprises: Receiving a user's touch operation on the exhaust button; Based on the touch operation, an exhaust command for the electronic hydraulic brake system is generated.

7. The method according to claim 1, characterized in that The method further comprises: When it is detected that the assembly of the electronic hydraulic brake system is replaced, an exhaust command is sent to the electronic hydraulic brake system.

8. An exhaust device for an electronic hydraulic brake system, characterized in that: Applied to a vehicle controller, the vehicle controller is in communication connection with an electronic hydraulic brake system, the solenoid valve group of the electronic hydraulic brake system is in an initial state, and the device comprises: A first exhaust module, configured to control the state change of the solenoid valve group to exhaust the mechanical brake circuit and the first chamber corresponding to the master cylinder in the electronic hydraulic brake system when receiving an exhaust command for the electronic hydraulic brake system; The second exhaust module is used to control the state change of the solenoid valve group to exhaust the second chamber of the master cylinder and / or the electric cylinder, wherein the electronic hydraulic brake system includes a master cylinder and an electric cylinder, wherein the master cylinder includes a first chamber and a second chamber.

9. A vehicle, characterized in that: The invention comprises a vehicle controller and a memory, wherein the memory stores a computer program executable by the vehicle controller, and the vehicle controller can execute the computer program to implement the steps of the method according to any one of claims 1 to 7.

10. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a vehicle controller, the steps of the method according to any one of claims 1 to 7 are implemented.

Images