Electromagnetic valve control method, braking system, electronic equipment and vehicle

Abstract

The invention provides an electromagnetic valve control method, a braking system, electronic equipment and a vehicle, and relates to the technical field of vehicle control The electromagnetic valve control method comprises the steps that a first preset signal is responded, the holding current of an electromagnetic valve is controlled to be a first preset value so as to open the electromagnetic valve, and the first preset signal represents an instruction for requesting the electromagnetic valve to be powered on; after the holding current of the electromagnetic valve is kept at a first preset value for a first preset duration, the holding current of the electromagnetic valve is controlled to be a second preset value, and the second preset value is smaller than the first preset value; and under the condition that the holding current of the electromagnetic valve is kept at a second preset value and the first preset signal is not received again within a second preset duration, the holding current of the electromagnetic valve is controlled to be a third preset value, and the third preset value is smaller than the second preset value. The problems that in the prior art, an electromagnetic valve used for vehicle braking control is poor in actual application effect, and the driving experience of a user is affected are solved.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle control technology, and in particular to a solenoid valve control method, a braking system, an electronic device, and a vehicle. Background Art

[0002] When the current braking system is building pressure normally, if the driver steps on the brake pedal or there is a braking force request, the corresponding solenoid valve will be powered on and opened or powered on and closed. If the driver does not step on the brake pedal or there is no braking force request, the above solenoid valve will be powered off after maintaining it for a period of time. When the driver steps on the brake pedal again, the above solenoid valve will be powered on again.

[0003] However, during the execution of the above-mentioned current strategy, the driver will frequently hear the sound of the solenoid valve opening, affecting the driving experience and ultimately causing user complaints; on the other hand, the frequent operation of the above-mentioned solenoid valve will also accelerate the abnormal wear of the solenoid valve, and if the solenoid valve is abnormally closed during the holding process under the current strategy, it is easy to prevent it from opening even if it is powered on normally, thereby causing braking abnormalities and further affecting the user's driving experience. Summary of the Invention

[0004] In response to the deficiencies in the prior art, the present disclosure provides a solenoid valve control method, a braking system, an electronic device, and a vehicle, which solve the problem in the prior art that the actual application effect of the solenoid valve used for vehicle braking control is poor, affecting the user's driving experience.

[0005] At least one embodiment of the present disclosure provides a solenoid valve control method, including: In response to a first preset signal, controlling the maintaining current of the solenoid valve to be a first preset value to open the solenoid valve, wherein the first preset signal is characterized as an instruction requesting the solenoid valve to be powered on; After the holding current of the solenoid valve maintains the first preset value for a first preset time, controlling the holding current of the solenoid valve to be a second preset value, wherein the second preset value is smaller than the first preset value; When the holding current of the solenoid valve is maintained at the second preset value and continues for the second preset time period without receiving the first preset signal again, the holding current of the solenoid valve is controlled to be a third preset value, wherein the third preset value is smaller than the second preset value.

[0006] The technical solution provided by the present disclosure has at least the following beneficial effects: The present application uses a constant power-on method, that is, controlling the maintaining current of the solenoid valve to maintain at the second preset value or the third preset value without dropping, thereby avoiding frequent opening and closing of the valve during driving and improving driving comfort. In the process of maintaining the current at the second preset value, after determining that there is no need for frequent braking, the maintaining current is timely reduced from the second preset value to the third preset value. When the resistance remains unchanged, the temperature rise of the solenoid valve can be appropriately reduced. At the same time, when the brake pedal is stepped on or there is a braking force request after the maintaining current is reduced, the large current is compensated, that is, firstly by maintaining the large current of the first preset value for a first preset time to compensate, so as to avoid abnormal closing or abnormal opening of the solenoid valve, thereby further improving the user's driving experience.

[0007] In a solenoid valve control method provided in one embodiment of the present invention, the first preset signal includes: Brake pedal opening signal, and / or braking force request signal.

[0008] In a solenoid valve control method provided in one embodiment of the present invention, the solenoid valve includes at least one of the following used in a vehicle brake control system: Shut off solenoid valve, pressure supply valve and suction solenoid valve.

[0009] In a solenoid valve control method provided by one embodiment of the present invention, the first preset time length is 30 milliseconds, and the second preset time length is 20 seconds.

[0010] In a solenoid valve control method provided by one embodiment of the present invention, the first preset value is 2.2A, the second preset value is 0.8A, and the third preset value is 0.6A.

[0011] At least one embodiment of the present disclosure further provides a vehicle braking control system, comprising: An instruction sending module is configured to send a first preset signal, where the first preset signal is characterized as an instruction requesting the solenoid valve to be powered on; The brake control module is configured to send a holding current having a first preset value in response to a first preset signal, and, after the holding current maintains the first preset value for a first preset period of time, update the holding current to a second preset value, wherein the second preset value is less than the first preset value, and When the holding current maintains the second preset value and does not receive the first preset signal again within a second preset time period, updating the holding current to a third preset value, wherein the third preset value is smaller than the second preset value, and The solenoid valve is configured to receive a holding current of the first preset value, the second preset value, and the third preset value.

[0012] At least one embodiment of the present disclosure further provides a vehicle braking control system, wherein the first preset signal includes: a brake pedal opening signal, and / or a braking force request signal.

[0013] At least one embodiment of the present disclosure further provides a vehicle braking control system, wherein the solenoid valve includes at least one of the following: Shut off solenoid valve, pressure supply valve and suction solenoid valve.

[0014] An embodiment of the present disclosure further provides a computer-readable storage medium, wherein the computer-readable storage medium stores instructions. When the instructions are executed on a terminal device, the terminal device executes the solenoid valve control method as described above.

[0015] An embodiment of the present disclosure further provides an electronic device, including a memory, a processor, and a program stored in the memory and running on the processor, wherein the processor implements the solenoid valve control method as described above when executing the program.

[0016] An embodiment of the present disclosure further provides a vehicle, comprising: a vehicle body, and a vehicle braking control system as described above, which is configured on the body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A flow chart of a solenoid valve control method provided in an embodiment of the present disclosure; Figure 2 for Figure 1 A diagram showing changes in the holding current of the embodiment shown; Figure 3 A schematic structural diagram of a vehicle braking control system provided by an embodiment of the present disclosure; Figure 4 A schematic diagram of the structure of an electronic device provided by the present disclosure.

[0018] In the accompanying drawings, the components represented by the reference numerals are as follows: 10. Electronic device, 11. Processor, 12. Read-only memory (ROM), 13. Random access memory (RAM), 14. Bus, 15. Input / output (I / O) interface, 16. Input unit, 17. Output unit, 18. Storage unit, 19. Communication unit. DETAILED DESCRIPTION

[0019] The principles and features of the present disclosure are described below. The examples given are only used to explain the present disclosure and are not used to limit the scope of the present disclosure.

[0020] The present disclosure provides a solenoid valve control method. Figure 1 As shown, including: In response to a first preset signal, controlling the maintaining current of the solenoid valve to be a first preset value to open the solenoid valve, wherein the first preset signal is characterized as an instruction requesting the solenoid valve to be powered on; After the holding current of the solenoid valve maintains the first preset value for a first preset time, controlling the holding current of the solenoid valve to be a second preset value, wherein the second preset value is smaller than the first preset value; When the holding current of the solenoid valve is maintained at the second preset value and continues for the second preset time without receiving the first preset signal again, the holding current of the solenoid valve is controlled to be a third preset value, wherein the third preset value is smaller than the second preset value.

[0021] The present application uses a constant power-on method, that is, controlling the maintaining current of the solenoid valve to maintain at the second preset value or the third preset value without dropping, thereby avoiding frequent opening and closing of the valve during driving and improving driving comfort. In the process of maintaining the current at the second preset value, after determining that there is no need for frequent braking, the maintaining current is timely reduced from the second preset value to the third preset value. When the resistance remains unchanged, the temperature rise of the solenoid valve can be appropriately reduced. At the same time, when the brake pedal is stepped on or there is a braking force request after the maintaining current is reduced, the large current is compensated, that is, firstly by maintaining the large current of the first preset value for a first preset time to compensate, so as to avoid abnormal closing or abnormal opening of the solenoid valve, thereby further improving the user's driving experience.

[0022] In an exemplary embodiment provided by the present disclosure, the first preset signal includes: a brake pedal opening signal and / or a braking force request signal, wherein the brake pedal opening signal refers to a signal emitted by a brake pedal sensor or a displacement / pressure sensor integrated in a brake pedal module, and is a physical control signal directly and subjectively applied by the driver; The braking force request signal is a request sent by a driving assistance system such as adaptive cruise control or automatic emergency braking through a controller, or Coordinate braking requirements in energy recovery or hybrid systems through the vehicle controller, or Through the electronic stability program, braking force is actively requested during anti-skid or body stability control. That is, the braking force request signal comes from other ECUs, and the vehicle brake control system actively sends a logic control signal.

[0023] In an exemplary embodiment provided by the present disclosure, the solenoid valve includes at least one of the following applied in a vehicle brake control system: The shut-off solenoid valve (CSV), pressure supply valve (PSV), and suction solenoid valve (SSV) are the main on-off valves in the vehicle brake control system's main hydraulic circuit, isolating or connecting the hydraulic path between the master brake cylinder and the wheel cylinders. They remain open during normal braking, allowing the driver's pedal force to be transmitted to the wheel cylinders. They close during electronic braking intervention, severing the driver's mechanical hydraulic connection to the wheel cylinders and allowing the system to actively control braking force. The PSV valve, in the vehicle brake control system, controls the hydraulic path between the high-pressure accumulator or electric hydraulic pump and the wheel cylinders and is an active pressure-building valve. It opens during electronic braking to deliver the system's actively generated high-pressure oil to the wheel cylinders. The SSV valve, in the vehicle brake control system, controls the return path between the low-pressure accumulator or reservoir and the hydraulic pump and is a pressure-reducing or oil-returning valve. It opens during the ABS / ESP decompression phase to return excess brake fluid from the wheel cylinders to the low-pressure side.

[0024] If the driver steps on the brake pedal or requests braking force, the CSV valve will be powered on and closed, cutting off the connection between the pedal and the wheel cylinder, the PSV valve will be powered on and opened (pressurization stage), the SSV valve will be closed, and the system will actively pressurize. Then the SSV valve will be powered on (depressurization stage), the PSV will be closed, and the wheel cylinder oil pressure will flow back to the low-pressure end. The present disclosure is mainly used for the above three types of valves to be constantly powered on during the power-on process, combined with the method of compensating for large currents, to improve the user's driving experience.

[0025] Specifically, the first preset time length provided in this embodiment is 30 milliseconds, and the second preset time length is 20 seconds. The above two time lengths can be adjusted according to actual conditions and are not limited here to meet the first preset time length for large current compensation for a shorter time, and to monitor for a longer time whether the current state requires frequent braking.

[0026] Specifically, the first preset value is 2.2A, the second preset value is 0.8A, and the third preset value is 0.6A. Similarly, the specific values ​​of the above current sizes can be adjusted according to actual needs to ensure that the first preset value can ensure that the above solenoid valve is abnormally closed, and then operates normally after large current compensation. The maintaining current of the above solenoid valve remains open at the second preset value, and the probability of abnormal closure at the third preset value is still low.

[0027] In summary, please refer to Figure 2As shown in the figure, after the three solenoid valves are powered on for the first time, the solenoid valves are kept powered on. At this time, the solenoid valves maintain a holding current of 0.8A. Maintaining a current of 0.8A here is a relatively safe current, which reduces the probability of abnormal closure of each solenoid valve during the pressure building process; when the driver does not step on the brake pedal or there is no braking force request, the timing starts. If the time exceeds 20s, the holding current is reduced to 0.6A, otherwise it continues to maintain 0.8A. Reducing it to 0.6A here can reduce the temperature rise of the solenoid valve and extend its service life. At the same time, the holding current of 0.6A is reduced only after the driver has not stepped on the brake pedal or has no braking force request for a certain period of time, indicating that there is no braking force at this time. Even with frequent braking demands, maintaining a holding current of 0.6A will not cause the solenoid valve to close abnormally. Endurance tests have shown that maintaining a holding current of 0.6A will not have much impact on the service life of the valve. If the holding current drops to 0.6A, the driver steps on the brake pedal again or there is a braking force request, the holding current will rise to 2.2A. After the 2.2A holding current lasts for 30ms, it drops to 0.8A again. The 30ms high current compensation here can reopen the valve even after it is abnormally closed, completing a compensation cycle. If the driver does not step on the pedal or there is no braking force request at this time, the next compensation cycle is entered.

[0028] The present disclosure also provides a vehicle braking control system. Figure 3 As shown, including: The instruction sending module is configured to send a first preset signal, wherein the first preset signal is characterized as an instruction requesting the solenoid valve to be powered on; the brake control module is configured to send a holding current with a first preset value in response to the first preset signal, and, after the holding current maintains the first preset value for a first preset time, update the holding current to a second preset value, wherein the second preset value is smaller than the first preset value, and, When the holding current maintains the second preset value and does not receive the first preset signal again within the second preset time period, the holding current is updated to a third preset value, wherein the third preset value is smaller than the second preset value, and The solenoid valve is configured to receive a holding current of a first preset value, a second preset value, and a third preset value.

[0029] Specifically, the first preset signal includes: Brake pedal opening signal, and / or braking force request signal.

[0030] Specifically, the solenoid valve includes at least one of the following: Shut off solenoid valve, pressure supply valve and suction solenoid valve.

[0031] Specifically, the first preset time length is 30 milliseconds, and the second preset time length is 20 seconds.

[0032] Specifically, the first preset value is 2.2A, the second preset value is 0.8A, and the third preset value is 0.6A. The embodiment of the present disclosure also provides a computer-readable storage medium, which stores instructions. When the instructions are run on the terminal device, the terminal device executes a solenoid valve control method as described above.

[0033] An embodiment of the present disclosure further provides an electronic device, including a memory, a processor, and a program stored in the memory and running on the processor. When the processor executes the program, a solenoid valve control method as described above is implemented.

[0034] An embodiment of the present disclosure further provides a vehicle, comprising: a vehicle body, and a vehicle braking control system as described above, which is configured on the body.

[0035] Figure 4 A schematic diagram of the structure of an electronic device 10 that can be used to implement an embodiment of the present disclosure is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present disclosure described and / or required herein.

[0036] like Figure 4 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., which is communicatively connected to the at least one processor 11. The memory stores a computer program that can be executed by the at least one processor. The processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 into the random access memory (RAM) 13. Various programs and data required for the operation of the electronic device 10 can also be stored in the RAM 13. The processor 11, ROM 12, and RAM 13 are connected to each other via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0037] Multiple components in the electronic device 10 are connected to the I / O interface 15, including an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a magnetic disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0038] The processor 11 can be any general-purpose and / or specialized processing component with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a solenoid valve control method.

[0039] In some embodiments, a solenoid valve control method can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the solenoid valve control method described above can be performed. Alternatively, in other embodiments, the processor 11 can be configured to perform a solenoid valve control method in any other appropriate manner (for example, by means of firmware).

[0040] Various embodiments of the systems and techniques described herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), system-on-chip systems (SOCs), programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system that includes at least one programmable processor, which can be a special-purpose or general-purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0041] Computer programs for implementing the methods of the present disclosure may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when the computer program is executed by the processor, the functions / operations specified in the flowcharts and / or block diagrams are implemented. The computer program may be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0042] In the context of the present disclosure, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, device, or apparatus. A computer-readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or apparatus, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CDROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0043] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device that has: a display device for displaying information to the user, such as a CRT (cathode ray tube) or an LCD (liquid crystal display); and a keyboard and a pointing device (such as a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (such as visual feedback, auditory feedback, or tactile feedback); and the input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0044] The systems and techniques described herein can be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such back-end components, middleware components, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0045] A computing system may include a client and a server. The client and server are typically remote from each other and typically interact via a communication network. This client-server relationship arises through computer programs running on the respective computers, creating a client-server relationship. The server may be a cloud server, also known as a cloud computing server or cloud host. This server is a hosting product within the cloud computing service ecosystem, addressing the management difficulties and limited scalability of traditional physical hosting and VPS services.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0048] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

Claims

1. A solenoid valve control method, characterized in that: include: In response to a first preset signal, controlling the maintaining current of the solenoid valve to be a first preset value, wherein the first preset signal is characterized as an instruction requesting the solenoid valve to be powered on; After the holding current of the solenoid valve maintains the first preset value for a first preset time, controlling the holding current of the solenoid valve to be a second preset value, wherein the second preset value is smaller than the first preset value; When the holding current of the solenoid valve is maintained at the second preset value and continues for the second preset time period without receiving the first preset signal again, the holding current of the solenoid valve is controlled to be a third preset value, wherein the third preset value is smaller than the second preset value.

2. A solenoid valve control method according to claim 1, characterized in that: The first preset signal includes: Brake pedal opening signal, and / or braking force request signal.

3. The solenoid valve control method according to claim 1, characterized in that: The solenoid valve includes at least one of the following used in a vehicle brake control system: Shut off solenoid valve, pressure supply valve and suction solenoid valve.

4. The solenoid valve control method according to claim 1, characterized in that: The first preset time length is 30 milliseconds, and the second preset time length is 20 seconds.

5. A solenoid valve control method according to claim 4, characterized in that: The first preset value is 2.2A, the second preset value is 0.8A, and the third preset value is 0.6A.

6. A vehicle braking control system, characterized in that: include: An instruction sending module is configured to send a first preset signal, where the first preset signal is characterized as an instruction requesting the solenoid valve to be powered on; a brake control module configured to send a holding current having a first preset value in response to a first preset signal, and After the holding current maintains the first preset value for a first preset time, the holding current is updated to a second preset value, wherein the second preset value is smaller than the first preset value, and When the holding current maintains the second preset value and does not receive the first preset signal again within a second preset time period, updating the holding current to a third preset value, wherein the third preset value is smaller than the second preset value, and The solenoid valve is configured to receive a holding current of the first preset value, the second preset value, and the third preset value.

7. A vehicle braking control system according to claim 6, characterized in that: The first preset signal includes: a brake pedal opening signal, and / or a braking force request signal.

8. The vehicle braking control system according to claim 6, characterized in that: The solenoid valve includes at least one of the following: Shut off solenoid valve, pressure supply valve and suction solenoid valve.

9. An electronic device comprising a memory, a processor, and a program stored in the memory and running on the processor, characterized in that: When the processor executes the program, the solenoid valve control method according to any one of claims 1 to 5 is implemented.

10. A vehicle, characterized in that: include: A vehicle body, and a vehicle braking control system according to any one of claims 6 to 8, arranged on the body.

Images