CN112849105A

CN112849105A - Vehicle brake system, control method and vehicle

Info

Publication number: CN112849105A
Application number: CN201911181954.6A
Authority: CN
Inventors: 李波; 黄泰硕; 李大为
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2021-05-28
Anticipated expiration: 2039-11-27
Also published as: CN112849105B

Abstract

The invention discloses a vehicle braking system, a control method and a vehicle.A solenoid valve and a foot feeling simulator are added to enable the vehicle braking system to be used in different vehicle modes (a driving mode and a non-driving mode), so that the functions of the vehicle braking system are enriched, interaction between a user and the vehicle braking system in the non-driving mode can be realized without adding too many devices, and the integral integration of the vehicle is ensured. And the electromagnetic valve is in a turn-off state in a driving mode and is in a turn-on state in a non-driving mode, so that the electromagnetic valve does not need to be in a working state all the time, the service life of the electromagnetic valve is prolonged, and the reliability of a vehicle braking system and the whole vehicle is further ensured.

Description

Vehicle brake system, control method and vehicle

Technical Field

The invention relates to the technical field of vehicles, in particular to a vehicle braking system, a control method and a vehicle.

Background

With the popularization of automobiles and the development of related scientific technologies, people increasingly depend on automobiles in daily life. The braking system is an important guarantee for the safe driving of the automobile, and the intelligent driving technology is continuously developed, so that the interaction mode of a driver and passengers with the automobile is more possible, and the vehicle-mounted entertainment technology can obtain more development space. However, the introduction of multiple interaction modes increases the frequency of using some devices or mechanisms in the vehicle brake system, which results in the reduction of the service life of the devices or mechanisms in the vehicle brake system, and the overall reliability of the vehicle is reduced.

Disclosure of Invention

The embodiment of the invention provides a vehicle braking system, a control method and a vehicle, which aim to solve the problems that the service life of part of equipment or mechanisms is reduced and the overall reliability of the vehicle is reduced due to the introduction of a plurality of interaction modes in the vehicle braking system at present.

In a first aspect of the embodiments of the present invention, a vehicle braking system is provided, including:

the brake pedal is connected with the brake master cylinder through a vacuum booster;

the brake master cylinder is respectively connected with the input end of the electromagnetic valve and the hydraulic control unit through a brake oil pipe;

the hydraulic control unit is connected with the brake;

the output end of the electromagnetic valve is connected with the foot feeling simulator, and the control end of the electromagnetic valve is connected with the control unit;

a foot sensation simulator;

and the control unit is used for sending a mode control instruction to the electromagnetic valve so as to control the conduction or the disconnection of the electromagnetic valve.

In a second aspect of the embodiments of the present invention, a method for controlling a vehicle brake system is provided, including:

receiving a mode switching signal, and controlling the on or off of an electromagnetic valve according to the mode switching signal, wherein the input end of the electromagnetic valve is connected with a brake master cylinder, and the output end of the electromagnetic valve is connected with a foot feel simulator;

if the mode switching signal is a first switching signal, the electromagnetic valve is controlled to be switched on, if the mode switching signal is a second switching signal, the electromagnetic valve is controlled to be switched off, the first switching signal indicates that the vehicle enters a non-driving mode, and the second switching signal indicates that the vehicle enters a driving mode.

According to the vehicle braking system and the control method, the electromagnetic valve and the foot feeling simulator are added, so that the vehicle braking system can be used in different vehicle modes (driving mode and non-driving mode), the functions of the vehicle braking system are enriched, interaction between a user and the vehicle braking system in the non-driving mode can be realized without additionally adding too many devices, and the integral integration of the vehicle is ensured. And the electromagnetic valve is in a turn-off state in a driving mode and is in a turn-on state in a non-driving mode, so that the electromagnetic valve does not need to be in a working state all the time, the service life of the electromagnetic valve is prolonged, and the reliability of a vehicle braking system and the whole vehicle is further ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic illustration of a vehicle braking system in accordance with an embodiment of the present invention;

FIG. 2 is another schematic illustration of a vehicle braking system in accordance with an embodiment of the present invention;

FIG. 3 is another schematic illustration of a vehicle braking system in accordance with an embodiment of the present invention;

FIG. 4 is a diagram of a foot-feel simulator in accordance with an embodiment of the present invention;

FIG. 5 is another schematic illustration of a vehicle braking system in accordance with an embodiment of the present invention;

FIG. 6 is an interactive flow chart of a method of controlling a vehicle braking system in accordance with an embodiment of the present invention;

FIG. 7 is a schematic diagram of a computer device according to an embodiment of the invention.

The reference numerals in the specification are as follows:

10. a brake pedal; 11. a vacuum booster; 12. an electronic vacuum pump; 13. a pedal sensor;

20. a brake master cylinder; 21. a first chamber; 22. a second chamber;

30. an electromagnetic valve;

40. a hydraulic control unit;

50. a brake;

60. a foot sensation simulator; 61. a simulator cylinder; 62. an oil inlet; 63. a simulator piston; 64. a simulator spring;

70. a control unit.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In one embodiment, as shown in fig. 1, an embodiment of the present invention provides a vehicle brake system in which a brake pedal 10 is connected to a master cylinder 20 through a vacuum booster 11. The master cylinder 20 is connected to the input end of the solenoid valve 30 and the hydraulic control unit 40 through brake oil pipes, respectively.

The hydraulic control unit 40 is connected to the brake 50, and may optionally include an Anti-lock Braking System (ABS) or an Electronic Stability Program (ESP). The output end of the solenoid valve 30 is connected to the foot-feel simulator 60, and the control end of the solenoid valve is connected to the control Unit 70, which may be an Electronic Control Unit (ECU) as an option. Alternatively, the solenoid valve 30 is a two-position, two-way solenoid valve. The control unit 70 is configured to send a mode control command to the solenoid valve 30 to control the on/off of the solenoid valve 30.

When the driver depresses the brake pedal 10 while the solenoid valve 30 is in the off state, pressure builds up in the master cylinder 20 by the assist force of the vacuum booster 11. The oil pressure established in the brake master cylinder 20 is transmitted to the brake 50 via the hydraulic control unit 40 through the brake oil pipe, thereby achieving braking of the vehicle during driving of the vehicle. When the solenoid valve 30 is in the off state, the oil pressure built up in the master cylinder 20 cannot be transmitted to the foot feel simulator 60, in which state the foot feel simulator does not affect the driver's feeling of the pedal during normal driving.

When the driver steps on the brake pedal 10 while the solenoid valve 30 is in the on state, the brake fluid in the master cylinder 20 enters the foot feel simulator 60 through the brake oil pipe and the solenoid valve 30, thereby realizing the simulation of the pedal feel. In this state, due to the conduction of this passage of the master cylinder 20, the brake oil pipe, the solenoid valve 30, and the foot feel simulator, high pressure cannot be established in the master cylinder, and the influence on the pedal feel simulation is small.

The on and off of the solenoid valve 30 is controlled by a mode control command sent from the control unit 70. The mode control command is used to instruct switching of a specific mode of the vehicle. In particular, the vehicle may include a driving mode and a non-driving mode. Wherein the non-driving mode is an interactive mode in which the vehicle braking system implements a mode of interaction that is distinct from the driving mode in the vehicle. The non-driving mode may, for example, enable functions for the vehicle braking system related to the in-vehicle entertainment mode (games, video). I.e., the user performs entertainment functions or other functions through interaction with the vehicle braking system. The non-driving mode refers to a control mode as opposed to the driving mode of the vehicle, i.e. the vehicle braking system is set not to perform a function related to the actual vehicle driving but to perform another function. These other functions may be an in-vehicle game function, an in-vehicle audio-visual function, or a simulated driving function, etc. Further, the non-driving mode may include a vehicle game mode, a vehicle audio/video mode, or a simulated driving mode.

The mode control command may be triggered after the user has performed a preset operational behavior, illustratively by interaction with a device/mechanism in the vehicle. For example, the mode control instruction may be generated by the vehicle trigger after the user clicks, long-presses, or slides a specific key in the vehicle, and then sent to the control unit. Or after the user operates through a central control PAD in the vehicle and indicates to enter the vehicle driving mode or the vehicle non-driving mode, the vehicle triggers and generates the mode control instruction and then sends the mode control instruction to the control unit.

Further, the mode control command may be determined by the vehicle after the user performs a preset operation, and the mode control command is triggered and generated after it is determined that the vehicle currently allows the corresponding mode switching.

In this embodiment, this vehicle braking system can make vehicle braking system can be in the use of the vehicle mode (driving mode and non-driving mode) of difference through adding solenoid valve and foot feel simulator, has richened vehicle braking system's function, need not additionally increase too many devices and can realize that user and vehicle braking system carry out the interaction of non-driving mode, have guaranteed the holistic integration of vehicle. And the electromagnetic valve is in a turn-off state in a driving mode and is in a turn-on state in a non-driving mode, so that the electromagnetic valve does not need to be in a working state all the time, the service life of the electromagnetic valve is prolonged, and the reliability of a vehicle braking system and the whole vehicle is further ensured.

In one embodiment, the control unit is further configured to receive a mode switching signal, and detect an operating condition signal of the vehicle if the mode switching signal is a first switching signal, where the first switching signal indicates that the vehicle enters a non-driving mode, and the operating condition signal includes at least one of a wheel speed sensor signal, a parking signal, a battery charge level signal, and an ignition switch signal. And if the working condition signal meets the preset switching condition, the control unit is also used for sending a mode control instruction to the electromagnetic valve so as to control the conduction of the electromagnetic valve.

The mode switching signal may be generated by triggering after a user implements a preset operation behavior. Illustratively, the mode switch signal is triggered by a user through interaction with a device/mechanism in the vehicle. For example, the mode switching signal may be generated for a vehicle trigger after a user clicks, long-presses, or slides a specific key in the vehicle. Optionally, the mode switch signal comprises a first switch signal indicating that the vehicle enters a non-driving mode.

The working condition signal is a signal related to the working condition of the vehicle, and the working condition signal comprises at least one of a wheel speed sensor signal, a parking signal, a storage battery electric quantity signal and an ignition switch signal. Wherein the wheel speed sensor signal is used for indicating the wheel speed of the vehicle, when the wheel speed sensor signal indicates that the wheel speed of the vehicle is not zero, it indicates that the vehicle is still in the driving process, and if the vehicle is allowed to enter a non-driving mode at this time, a risk may be brought. Therefore, whether the current working condition of the vehicle can enter the non-driving mode or not can be judged through the detection of the signal of the wheel speed sensor. Further, the vehicle may not be provided with the condition to enter the non-driving mode if the parking signal in the vehicle is not activated. The storage battery electric quantity signal is used for indicating the electric quantity of a storage battery in the vehicle, in the non-driving mode of the vehicle, the electric quantity of the storage battery in the vehicle is ensured to be sufficient, and the situation that when the vehicle is switched from the non-driving mode to the driving mode, the electric quantity of the storage battery is insufficient to support the realization of the driving mode of the vehicle is avoided. A charge threshold, illustratively 20%, may be preset, and the vehicle is not permitted to enter the non-driving mode when the battery charge signal is detected to indicate that the battery charge in the vehicle is less than the charge threshold. Further, after the vehicle has entered the non-driving mode, if it is detected that the amount of charge of the battery in the vehicle is less than the charge threshold, the vehicle is prompted to exit the non-driving mode. The ignition switch signal is used for indicating gear information of the ignition switch, and the vehicle can be allowed to enter a non-driving mode when the ignition switch is in a specific gear, and the specific gear can be a power switch gear.

It is understood that the above listed operating condition signals (wheel speed sensor signal, parking signal, battery level signal and ignition switch signal) may be activated individually or in combination according to the actual application scenario and safety factor.

After receiving the mode switching signal, if the mode switching signal is the first switching signal, a control unit in the vehicle is configured to detect a working condition signal of the vehicle, and if the working condition signal meets a preset switching condition, the control unit is further configured to send a mode control instruction to the electromagnetic valve to control conduction of the electromagnetic valve.

The preset switching condition may be set according to a specific working condition signal, for example, the preset switching condition may be at least one of a wheel speed sensor signal indicating that a wheel speed of the vehicle is zero, a parking signal is activated, a battery charge signal indicating that a battery charge is greater than a preset charge threshold, or an ignition switch signal indicating that the ignition switch is in a specific gear.

If the working condition signal meets the preset switching condition, the current working condition of the vehicle can enter a non-driving mode, and at the moment, the control unit sends a mode control instruction to the electromagnetic valve to control the conduction of the electromagnetic valve, so that the vehicle braking system enters the non-driving mode.

In one embodiment, the operating condition signals include a wheel speed sensor signal, a parking signal, a battery charge signal, and an ignition switch signal. After the mode switching signal is received as a first switching signal, a wheel speed sensor signal, a parking signal, a storage battery electric quantity signal and an ignition switch signal in the vehicle are detected, and after the four signals (the wheel speed sensor signal, the parking signal, the storage battery electric quantity signal and the ignition switch signal) respectively accord with respective preset switching conditions, the control unit sends a mode control command to the electromagnetic valve so as to control the conduction of the electromagnetic valve. Thus, the safety of the vehicle and the user is better ensured.

In one embodiment, when the vehicle braking system is in the non-driving mode, the control unit is further configured to detect a working condition signal of the vehicle, and send a mode control command to the electromagnetic valve to control the electromagnetic valve to close if the working condition signal does not meet a preset switching condition. When the vehicle brake system is in the non-driving mode, if the condition signal of the vehicle is detected to be changed, so that the current vehicle condition is not suitable for the non-driving mode, the control unit sends a mode control command to the electromagnetic valve to control the electromagnetic valve to be closed, so that the vehicle brake system exits the non-driving mode, and the safety of a user and the vehicle is ensured.

In this embodiment, the control unit is further configured to receive a mode switching signal, and on the premise that the mode switching signal is the first switching signal, the control unit detects a working condition of the vehicle, and sends a mode control command to the electromagnetic valve on the premise that the working condition of the vehicle is suitable (meets a preset switching condition) to control the electromagnetic valve to be turned on, so as to control the vehicle braking system to enter the non-driving mode, thereby better ensuring that the vehicle braking system switches between different modes and also ensuring safety of a user and the vehicle.

In one embodiment, as shown in fig. 2, the vehicle braking system further includes an electronic vacuum pump 12 connected to the vacuum booster 11 and the control unit 70, respectively.

The control unit 70 is further configured to send a switch switching signal to the electronic vacuum pump to control the electronic vacuum pump 12 to be turned on or turned off, where the electronic vacuum pump 12 is controlled to be turned off when the switch switching signal is a first switch signal, the electronic vacuum pump 12 is controlled to be turned on when the switch switching signal is a second switch signal, the first switch signal indicates that the vehicle enters a non-driving mode, and the second switch signal indicates that the vehicle enters a driving mode.

In a specific embodiment, after the control unit receives the mode switching signal, and the mode switching signal is the first switching signal, the control unit further detects a working condition signal of the vehicle, and if the working condition signal meets a preset switching condition, the control unit is further configured to send a first switching signal to the electronic vacuum pump, so as to control the electronic vacuum pump 12 to be turned off. It is understood that if the vehicle exits from the non-driving mode (for example, receives the second switching signal), and returns to the driving mode, the control unit sends a second switching signal to the electronic vacuum pump 12 to control the electronic vacuum pump 12 to be turned on. That is, the control unit sends a first switching signal to the electronic vacuum pump after receiving the first switching signal (on the premise that the operating condition signal meets the preset switching condition), and the control unit sends a second switching signal to the electronic vacuum pump after receiving the second switching signal.

In this embodiment, when the vehicle is in the driving mode, the electronic vacuum pump 12 is turned on to cooperate with the vacuum booster 11 to better perform the braking function of the vehicle in the driving mode. When the vehicle is in the non-driving mode, the actual braking function of the vehicle is not needed to be realized, and therefore, the control unit can send a switch switching signal to the electronic vacuum pump 12 to control the electronic vacuum pump 12 to be switched off. Therefore, the electronic vacuum pump can be ensured not to be in a working state in a non-driving mode, the service life of the electronic vacuum pump is further ensured, and the endurance of a vehicle is also ensured.

In one embodiment, as shown in fig. 2, the vehicle brake system further comprises a pedal sensor 13 for detecting the magnitude of the change of said brake pedal 10 and generating a pedal sensor signal.

The control unit 70 is further configured to detect the pedal sensor signal and generate a control command according to the pedal sensor signal to indicate a corresponding control action in the non-driving mode.

Specifically, the pedal sensor 13 may be an angle sensor, a displacement sensor, a force sensor, or the like. The pedal sensor 13 is used to detect the magnitude of the brake pedal variation to convert the user's action on the brake pedal into a pedal sensor signal. And the control unit generates a control instruction according to the received pedal sensor signal according to a preset corresponding relation so as to indicate a corresponding control action in the non-driving mode. The control action may be implemented for other functions in the non-driving mode, for example, control of other devices, virtual braking in the game, or other predefined functions, for example, in a racing game, i.e., control of the braking of a vehicle in the game. In order to meet pedal feeling requirements of different drivers, the corresponding relation between the variation amplitude of the brake pedal and the vehicle deceleration in the game can be adjusted in advance or in real time through the control unit, so that adaptation to different users can be realized. Further, the corresponding control action also comprises the control of the vehicle brake lamp in the game, and the control instruction is generated according to the pedal sensor signal and indicates the turning on or off of the vehicle brake lamp in the game. Specifically, when the driver depresses the brake pedal 10, the control unit generates a control instruction instructing the lighting of the vehicle brake lamp within the game. When the driver releases the brake pedal 10, the control unit generates a control command instructing the turning off of the vehicle brake lights in the game.

In the present embodiment, the magnitude of the change of the brake pedal 10 is detected by providing the pedal sensor 13, and the magnitude of the change is converted into a pedal sensor signal. The control unit is used for detecting the pedal sensor signal and generating a control command according to the pedal sensor signal so as to indicate corresponding control action in a non-driving mode. Therefore, other functions of the brake pedal can be realized in the non-driving mode, and the function of the vehicle brake system in the non-driving mode is realized in a diversified manner.

In one embodiment, the master cylinder includes a first chamber 21 and a second chamber 22, the first chamber 21 is connected to the hydraulic control unit 40 through a brake oil pipe, and the second chamber 22 is connected to the input end of the solenoid valve 30 and the hydraulic control unit 40 through the brake oil pipe, respectively. The smooth realization of the braking function in the vehicle braking system can be better ensured under the vehicle driving mode.

In one embodiment, as shown in fig. 4, the foot-feel simulator includes:

and the simulator cylinder 61 is provided with an oil inlet 62.

A simulator piston 63 disposed within the simulator cylinder and connected to one end of the simulator spring.

And a simulator spring 64 disposed inside the simulator cylinder, the other end of the simulator spring being connected to the bottom of the simulator cylinder.

When the vehicle brake system is in a non-driving mode, when a driver steps on the brake pedal 10, brake fluid passes through the vacuum booster 11, the brake master cylinder 20 and the electromagnetic valve 30 to the foot feeling simulator 60, then acts on the simulator piston 63 through the oil inlet, and realizes simulation of the foot feeling of the driver on the brake pedal in a real driving mode through elastic deformation of the simulator spring 64.

In one embodiment, as shown in fig. 5, the control unit 70 receives a mode switching signal to correspondingly switch the modes (driving mode and non-driving mode) of the vehicle brake system. Specifically, if the received mode switching signal is the first switching signal, the control unit detects a working condition signal of the vehicle. Reading a wheel speed sensor signal, a parking signal, a battery charge signal and an ignition switch signal in the vehicle, sending a first switching signal to an electromagnetic valve 30 after the four signals (the wheel speed sensor signal, the parking signal, the battery charge signal and the ignition switch signal) respectively accord with respective preset switching conditions, controlling the electromagnetic valve to be switched on, sending the first switching signal to the electronic vacuum pump 12, and controlling the electronic vacuum pump 12 to be switched off. Thus, the vehicle brake system enters a non-driving mode.

In the non-driving mode, when the driver steps on the brake pedal 10, the brake fluid in the master cylinder 20 enters the foot feel simulator 60 through the brake pipe and the solenoid valve 30, thereby realizing the simulation of the pedal feel. In this state, due to the conduction of this passage of the master cylinder 20, the brake oil pipe, the solenoid valve 30, and the foot feel simulator, high pressure cannot be established in the master cylinder, and the influence on the pedal feel simulation is small. And, in non-driving mode, the electron vacuum pump is in the off-state, frequently starts the electron vacuum pump when avoiding non-driving mode and realizes vacuum helping hand, influences electron vacuum pump's life, has also reduced the noise of pump operation simultaneously, and is comfortable and experience better to playing the recreation.

If the mode switching signal received by the control unit is the second switching signal, the second switching signal is sent to the electromagnetic valve 30 to control the electromagnetic valve to be turned off, and a second switching signal is sent to the electronic vacuum pump 12 to control the electronic vacuum pump 12 to be turned on. Thus, the vehicle brake system enters the driving mode.

In the driving mode, when the driver depresses the brake pedal 10, pressure builds up in the brake master cylinder 20 by the assist force of the vacuum booster 11. The oil pressure established in the brake master cylinder 20 is transmitted to the brake 50 via the hydraulic control unit 40 through the brake oil pipe, thereby achieving braking of the vehicle during driving of the vehicle. When the solenoid valve 30 is in the off state, the oil pressure built up in the master cylinder 20 cannot be transmitted to the foot feel simulator 60, in which state the foot feel simulator does not affect the driver's feeling of the pedal during normal driving. In addition, in the driving mode, the electromagnetic valve is in a closed state, so that the working time of the electromagnetic valve in a vehicle braking system is reduced, the service life of the electromagnetic valve is prolonged, and the reliability of the vehicle braking system and the overall reliability of the vehicle are further ensured.

An embodiment of the present invention further provides a control method of a vehicle brake system, which is applicable to a control unit in the vehicle brake system, and preferably, the control method is applied to the control unit of the vehicle brake system according to any one of the embodiments, and the control method includes:

receiving a mode switching signal, and controlling the on or off of an electromagnetic valve according to the mode switching signal, wherein the input end of the electromagnetic valve is connected with a brake master cylinder, and the output end of the electromagnetic valve is connected with a foot feeling simulator.

In this embodiment, this vehicle braking system is through adding solenoid valve and foot feel simulator, controls the use that makes vehicle braking system can be in the vehicle mode of difference through the control unit, has richened vehicle braking system's function, does not need too many devices can realize above-mentioned function, has guaranteed the holistic integration of vehicle. And the electromagnetic valve does not need to be in a conducting state all the time, the service life of the electromagnetic valve is prolonged, and the reliability of the vehicle braking system is further improved.

In one embodiment, as shown in fig. 6, the controlling the on or off of the solenoid valve according to the mode switching signal includes:

s601: detecting a condition signal of the vehicle after receiving the mode switching signal as the first signal, wherein the condition signal comprises at least one of a wheel speed sensor signal, a parking signal, a battery charge level signal and an ignition switch signal.

S602: and if the working condition signal meets a preset switching condition, sending a mode control instruction to the electromagnetic valve so as to control the conduction of the electromagnetic valve.

The working condition signal is a signal related to the working condition of the vehicle, and the working condition signal comprises at least one of a wheel speed sensor signal, a parking signal, a storage battery electric quantity signal and an ignition switch signal. Wherein the wheel speed sensor signal is used for indicating the wheel speed of the vehicle, when the wheel speed sensor signal indicates that the wheel speed of the vehicle is not zero, it indicates that the vehicle is still in the driving process, and if the vehicle is allowed to enter a non-driving mode at this time, a risk may be brought. Therefore, whether the current working condition of the vehicle can enter the non-driving mode or not can be judged through the detection of the signal of the wheel speed sensor. Further, the vehicle may not be provided with the condition to enter the non-driving mode if the parking signal in the vehicle is not activated. The storage battery electric quantity signal is used for indicating the electric quantity of a storage battery in the vehicle, and in a non-driving mode of the vehicle, the storage battery electric quantity in the vehicle is ensured to be sufficient, and smooth operation of the vehicle can be ensured. A charge threshold, illustratively 20%, may be preset, and the vehicle is not permitted to enter the non-driving mode when the battery charge signal is detected to indicate that the battery charge in the vehicle is less than the charge threshold. Further, after the vehicle has entered the non-driving mode, if it is detected that the amount of charge of the battery in the vehicle is less than the charge threshold, the vehicle is prompted to exit the non-driving mode. The ignition switch signal is used for indicating gear information of the ignition switch, and the vehicle can be allowed to enter a non-driving mode when the ignition switch is in a specific gear, and the specific gear can be a power switch gear.

After receiving the mode switching signal, if the mode switching signal is the first switching signal, a control unit in the vehicle further detects a working condition signal of the vehicle, and if the working condition signal meets a preset switching condition, the control unit sends a mode control instruction to the electromagnetic valve to control the conduction of the electromagnetic valve.

In one embodiment, when the vehicle braking system is in a non-driving mode, the control unit continuously or periodically detects a working condition signal of the vehicle, and if the working condition signal does not meet a preset switching condition, sends a mode control command to the electromagnetic valve to control the electromagnetic valve to be closed. When the vehicle brake system is in the non-driving mode, if the condition signal of the vehicle is detected to be changed, so that the current vehicle condition is not suitable for the non-driving mode, the control unit sends a mode control command to the electromagnetic valve to control the electromagnetic valve to be closed, so that the vehicle brake system exits the non-driving mode, and the safety of a user and the vehicle is ensured.

In this embodiment, after the control unit receives the mode switching signal, on the premise that the mode switching signal is the first switching signal, the control unit detects the working condition of the vehicle, and on the premise that the working condition of the vehicle is suitable (meets a preset switching condition), sends a mode control command to the electromagnetic valve to control the conduction of the electromagnetic valve so as to control the vehicle braking system to enter the non-driving mode, so that the safety of a user and the vehicle is better ensured while the vehicle braking system is switched between different modes.

In one embodiment, the control method further comprises:

and sending a switch switching signal to the electronic vacuum pump to control the on or off of the vacuum pump, wherein when the switch switching signal is a first switch signal, the electronic vacuum pump is controlled to be off, and when the switch switching signal is a second switch signal, the electronic vacuum pump is controlled to be on, the first switch signal indicates that the vehicle enters a non-driving mode, and the second switch signal indicates that the vehicle enters a driving mode.

In one embodiment, after the control unit receives the mode switching signal, and the mode switching signal is the first switching signal, the control unit further detects a working condition signal of the vehicle, and if the working condition signal meets a preset switching condition, the control unit sends a first switching signal to the electronic vacuum pump to control the electronic vacuum pump 12 to be turned off. It can be understood that if the vehicle exits from the non-driving mode and returns to the driving mode, the control unit sends a second switching signal to the electronic vacuum pump 12 to control the electronic vacuum pump 12 to be turned on.

In one embodiment, if the operating condition signal meets a preset switching condition, the control method further includes:

detecting a pedal sensor signal in a pedal sensor for detecting a magnitude of change of the brake pedal to generate a pedal sensor signal, generating a control command to indicate a corresponding control action in a non-driving mode based on the pedal sensor signal.

Specifically, the pedal sensor may be an angle sensor, a displacement sensor, a force sensor, or the like. The pedal sensor is configured to detect a magnitude of change of the brake pedal to convert a user's action on the brake pedal into a pedal sensor signal. And the control unit generates a control instruction according to the received pedal sensor signal according to a preset corresponding relation so as to indicate a corresponding control action in the non-driving mode. The control action may be implemented for other functions in the non-driving mode, for example, control of other devices, virtual braking in the game, or other predefined functions, for example, in a racing game, i.e., control of the braking of a vehicle in the game. In order to meet pedal feeling requirements of different drivers, the corresponding relation between the variation amplitude of the brake pedal and the vehicle deceleration in the game can be adjusted in advance or in real time through the control unit, so that adaptation to different users can be realized. Further, the corresponding control action also comprises the control of the vehicle brake lamp in the game, and the control instruction is generated according to the pedal sensor signal and indicates the turning on or off of the vehicle brake lamp in the game. Specifically, when the driver depresses the brake pedal 10, the control unit generates a control instruction instructing the lighting of the vehicle brake lamp within the game. When the driver releases the brake pedal 10, the control unit generates a control command instructing the turning off of the vehicle brake lights in the game.

In the present embodiment, the magnitude of the change of the brake pedal is detected by providing a pedal sensor, and the magnitude of the change is converted into a pedal sensor signal. The control unit detects the pedal sensor signal and generates a control command according to the pedal sensor signal to indicate a corresponding control action in a non-driving mode. Therefore, other functions of the brake pedal can be realized in the non-driving mode, and the function of the vehicle brake system in the non-driving mode is realized in a diversified manner.

It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

In one embodiment, a control device of a vehicle brake system is provided, which corresponds one-to-one to the control method of the vehicle brake system in the above-described embodiments. The control device of the vehicle brake system comprises a mode switching module:

the mode switching module is used for receiving a mode switching signal and controlling the on or off of an electromagnetic valve according to the mode switching signal, the input end of the electromagnetic valve is connected with a brake master cylinder, and the output end of the electromagnetic valve is connected with a foot feel simulator;

Preferably, the mode switching module comprises a working condition detection unit and a control instruction sending unit.

And the working condition detection unit is used for detecting a working condition signal of the vehicle after receiving the mode switching signal as the first signal, wherein the working condition signal comprises at least one of a wheel speed sensor signal, a parking signal, a storage battery electric quantity signal and an ignition switch signal.

And the control instruction sending unit is used for sending a mode control instruction to the electromagnetic valve to control the conduction of the electromagnetic valve when the working condition signal meets a preset switching condition.

Preferably, the control device of the vehicle brake system is further configured to send a switch switching signal to the electronic vacuum pump to control the on or off of the vacuum pump, wherein when the switch switching signal is a first switch signal, the electronic vacuum pump is controlled to be turned off, and when the switch switching signal is a second switch signal, the electronic vacuum pump is controlled to be turned on, the first switch signal indicates that the vehicle enters a non-driving mode, and the second switch signal indicates that the vehicle enters a driving mode.

Preferably, if the operating condition signal meets a preset switching condition, the control device of the vehicle braking system is further configured to detect a pedal sensor signal in a pedal sensor, and generate a control command according to the pedal sensor signal to indicate a corresponding control action in a non-driving mode, where the pedal sensor is configured to detect a variation range of the brake pedal and generate a pedal sensor signal.

For specific limitations of the control device of the vehicle brake system, reference may be made to the above limitations of the control method of the vehicle brake system, which are not described in detail herein. The respective modules in the control device of the vehicle brake system described above may be implemented in whole or in part by software, hardware, and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.

In one embodiment, a computer device is provided, which may be a control unit, the internal structure of which may be as shown in fig. 7. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer device is used to store data used in the control method of the vehicle brake system in the above-described embodiment. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a control method of a vehicle brake system.

In one embodiment, a computer device is provided, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and when the processor executes the computer program, the method for controlling the vehicle brake system in the above-mentioned embodiments is implemented.

In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, which, when being executed by a processor, carries out the method of controlling a vehicle brake system according to the above-described embodiments.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims

1. A vehicle braking system, comprising:

the hydraulic control unit is connected with the brake; the output end of the electromagnetic valve is connected with the foot feeling simulator, and the control end of the electromagnetic valve is connected with the control unit;

a foot sensation simulator;

and the control unit is used for sending a mode control command to the electromagnetic valve so as to control the conduction or the disconnection of the electromagnetic valve.

2. The vehicle brake system of claim 1, wherein the control unit is further configured to receive a mode switching signal, detect an operating condition signal of the vehicle if the mode switching signal is a first switching signal, the first switching signal indicating that the vehicle enters a non-driving mode, the operating condition signal including at least one of a wheel speed sensor signal, a parking signal, a battery charge level signal, and an ignition switch signal;

and if the working condition signal meets the preset switching condition, the control unit is also used for sending a mode control instruction to the electromagnetic valve so as to control the conduction of the electromagnetic valve.

3. The vehicle braking system according to claim 1, further comprising:

the electronic vacuum pump is respectively connected with the vacuum booster and the control unit;

the control unit is further used for sending a switch switching signal to the electronic vacuum pump so as to control the on or off of the vacuum pump, wherein when the switch switching signal is a first switch signal, the electronic vacuum pump is controlled to be turned off, and when the switch switching signal is a second switch signal, the electronic vacuum pump is controlled to be turned on, the first switch signal indicates that the vehicle enters a non-driving mode, and the second switch signal indicates that the vehicle enters a driving mode.

4. A vehicle braking system according to any one of claims 1 to 3, further comprising:

the pedal sensor is used for detecting the variation amplitude of the brake pedal and generating a pedal sensor signal;

the control unit is further configured to detect the pedal sensor signal and generate a control command based on the pedal sensor signal to indicate a corresponding control action in the non-driving mode.

5. A vehicle brake system according to any one of claims 1 to 3, wherein the master cylinder includes a first chamber and a second chamber, the first chamber being connected to the hydraulic control unit via a brake fluid line, and the second chamber being connected to the input of the solenoid valve and the hydraulic control unit via a brake fluid line, respectively.

6. A vehicle braking system according to any one of claims 1 to 3 wherein the foot feel simulator comprises:

the simulator cylinder body is provided with an oil inlet;

the simulator piston is arranged in the simulator cylinder body and is connected with one end of the simulator spring;

and the simulator spring is arranged in the simulator cylinder body, and the other end of the simulator spring is connected with the bottom of the simulator cylinder body.

7. A control method of a vehicle brake system, characterized by comprising:

8. The control method of a vehicle brake system according to claim 7, wherein said controlling on or off of the solenoid valve in accordance with the mode switching signal includes:

detecting a working condition signal of the vehicle after receiving the mode switching signal as a first signal, wherein the working condition signal comprises at least one of a wheel speed sensor signal, a parking signal, a storage battery electric quantity signal and an ignition switch signal;

and if the working condition signal meets a preset switching condition, sending a mode control instruction to the electromagnetic valve so as to control the conduction of the electromagnetic valve.

9. The control method of a vehicle brake system according to claim 8, characterized by further comprising:

10. The control method of a vehicle brake system according to claim 8, wherein if the operating condition signal meets a preset switching condition, the control method further comprises:

11. A vehicle characterized by comprising a vehicle brake system according to any one of claims 1-6.