Electronic parking system control method and device, vehicle, equipment and storage medium

Abstract

The application relates to an electronic parking system control method, device, equipment and storage medium. The electronic parking system control method comprises the following steps: if it is determined that a vehicle is in a parking state and the vehicle speed is lower than a preset vehicle speed threshold, it is determined whether the braking operation intensity is less than or equal to a preset sealing threshold; if yes, the electronic parking control valve is controlled to charge a preset sealing pressure value into the parking cavity of the spring brake air chamber, and the internal breathing valve of the spring brake air chamber is closed. According to the application, whether the vehicle is in the parking state and the vehicle speed is lower than the preset vehicle speed threshold is determined, and whether the braking operation intensity is less than or equal to the preset sealing threshold is further determined, so that whether the working condition of 'lightly stepping on the brake to start' is identified in the parking state. At this time, the electronic parking control valve is controlled to charge the preset sealing pressure value into the parking cavity of the spring brake air chamber, the internal breathing valve of the spring brake air chamber is closed, the air leakage and howling of the driving cavity and the parking cavity do not occur, and the risk of the air pressure drop of the braking system is reduced.

Description

Technical Field

[0001] This application relates to the field of truck braking system technology, specifically to an electronic parking system control method, device, equipment, and storage medium. Background Technology

[0002] Currently, commercial vehicle braking systems typically employ air-pressure braking, while electronic parking brake (EPB) systems are widely used in various commercial vehicle models due to their ease of operation and safety. As the logistics and transportation industry increasingly demands higher levels of vehicle comfort and reliability, the smoothness, quietness, and air pressure maintenance capabilities of the braking system during start-up have become key performance indicators.

[0003] In related technologies, the spring brake chamber of commercial vehicles typically has a driving chamber and a parking chamber, which are isolated by an internal breather valve. When the vehicle is parked, the parking chamber is vented, and the spring force maintains parking. When the vehicle starts, the EPB control unit receives a release command and controls the valve to inflate the parking chamber to overcome the spring force, thereby releasing the vehicle from parking. The opening and closing of the internal breather valve usually depends on the pressure difference between the driving and parking chambers or the passive action of a mechanical structure, designed to prevent gas exchange under non-operating conditions. Under normal operation, the driver establishes sufficient pressure in the driving chamber by deeply pressing the brake pedal, causing the internal breather valve to close.

[0004] However, when the driver lightly applies the brakes to start the vehicle, the pressure in the running chamber builds up slowly and the value is low. It often fails to reach the pressure threshold or pressure difference required for the internal breather valve to be passively closed, causing high-pressure gas in the running chamber to enter the parking chamber. This not only causes an abnormal drop in the vehicle's brake air pressure, affecting brake reserve safety, but also generates whistling noise due to the high-speed flow of gas.

[0005] Therefore, it is necessary to design a new electronic parking system control method to overcome the above problems. Summary of the Invention

[0006] This application provides an electronic parking system control method, device, equipment, and storage medium, which can solve the technical problems existing in the related art, such as abnormal drop in vehicle brake air pressure and whistling during vehicle start-up.

[0007] In a first aspect, embodiments of this application provide an electronic parking system control method, the electronic parking system control method comprising: If it is determined that the vehicle is in a parked state and the vehicle speed is lower than the preset vehicle speed threshold, then it is determined whether the braking operation intensity is less than or equal to the preset sealing threshold. If so, the electronic parking brake control valve is controlled to fill the parking chamber of the spring brake chamber with a preset sealing pressure value, thereby closing the internal breather valve of the spring brake chamber.

[0008] In conjunction with the first aspect, in one embodiment, determining whether the braking operation intensity is less than or equal to a preset sealing threshold includes: Determine whether the braking input intensity and rate of change are both less than or equal to the preset sealing threshold.

[0009] In conjunction with the first aspect, in one embodiment, determining whether both the braking input intensity and the rate of change are less than or equal to a preset sealing threshold includes: Based on the air chamber pressure P1, determine whether the service braking pressure is less than or equal to the preset pressure value A, and whether the pressure gradient is less than or equal to the preset gradient value B.

[0010] In conjunction with the first aspect, in one embodiment, determining whether both the braking input intensity and the rate of change are less than or equal to a preset sealing threshold includes: Based on the brake pedal travel S, determine whether the brake pedal travel is less than or equal to the preset travel value C, and whether the pedal pressing rate is less than or equal to the preset rate value D.

[0011] In conjunction with the first aspect, in one embodiment, the preset sealing pressure value is determined based on the minimum static shut-off pressure E of the dryer multi-loop valve.

[0012] In conjunction with the first aspect, in one embodiment, before determining whether the braking operation intensity is less than or equal to a preset sealing threshold, the method further includes: Acquire the parking switch signal, vehicle speed signal, and air chamber pressure P1; or acquire the parking switch signal, vehicle speed signal, and brake pedal travel S; The system determines whether the vehicle is in a parked state based on the parking switch signal, and determines whether the vehicle speed is lower than a preset speed threshold based on the vehicle speed signal.

[0013] Secondly, embodiments of this application provide an electronic parking system control device, the electronic parking system control device comprising: The electronic control unit is used to determine whether the braking intensity is less than or equal to a preset sealing threshold if it is determined that the vehicle is in a parked state and the vehicle speed is lower than a preset vehicle speed threshold. The electronic control unit is also used to control the electronic parking control valve to fill the parking chamber of the spring brake chamber with a preset sealing pressure value if the braking operation intensity is less than or equal to a preset sealing threshold, so as to close the internal breathing valve of the spring brake chamber.

[0014] Thirdly, embodiments of this application provide a vehicle, the vehicle including: the above-described electronic parking system control device.

[0015] Fourthly, embodiments of this application provide an electronic parking system control device, which includes a processor, a memory, and an electronic parking system control program stored in the memory and executable by the processor. When the electronic parking system control program is executed by the processor, it implements the steps of the above-described electronic parking system control method.

[0016] Fifthly, embodiments of this application provide a computer-readable storage medium storing an electronic parking system control program, wherein when the electronic parking system control program is executed by a processor, it implements the steps of the above-described electronic parking system control method.

[0017] The beneficial effects of the technical solutions provided in this application include: By determining whether the vehicle is in a parked state and whether the vehicle speed is lower than a preset speed threshold, it can be determined that the vehicle is in the parking start-up phase. Furthermore, it can be determined whether the braking operation intensity is less than or equal to a preset sealing threshold. In the parked state, it can identify whether the vehicle is in a "light braking start" condition. When the vehicle is lightly braking start, the braking operation intensity is insufficient to close the internal breather valve. At this time, by controlling the electronic parking control valve to fill the parking chamber of the spring brake air chamber with a preset sealing pressure value, the internal breather valve of the spring brake air chamber is closed. After the internal breather valve is closed, there is no air leakage or whistling in the driving chamber and parking chamber, and the risk of brake system pressure drop and braking force weakening due to air leakage is reduced. This solves the technical problem of abnormal drop in vehicle brake air pressure and whistling during vehicle start-up in related technologies. Attached Figure Description

[0018] Figure 1 This is a flowchart illustrating an embodiment of the electronic parking system control method of this application; Figure 2 This is a flowchart illustrating another embodiment of the electronic parking system control method of this application; Figure 3 This is a schematic diagram of the hardware structure of the electronic parking system control device involved in the embodiments of this application. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0020] In related technologies, commercial vehicles with air-pressure braking use a spring chamber with an internal breathing structure to achieve parking braking. When starting from a parked position, the brake pedal needs to be pressed quickly and deeply to ensure that the breather valve inside the spring chamber is closed and that there is no air leakage. For the internal breather valve inside the spring chamber to close in the parking position, the service brake pressure needs to meet requirements greater than pressure A (kPa) and pressure gradient B (bar / s). If this condition is not met, the internal breather valve opens, and air from the service chamber leaks into the parking chamber, causing a drop in brake system air pressure and producing a whistling sound.

[0021] This application provides an electronic parking system control method, device, equipment, and storage medium, which can solve the technical problems of abnormal drop in vehicle brake air pressure and whistling during vehicle start-up.

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0023] In a first aspect, embodiments of this application provide an electronic parking system control method.

[0024] In one embodiment, reference is made to Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the electronic parking system control method of this application. Figure 1 As shown, the electronic parking system control method includes: S100: If it is determined that the vehicle is in a parked state and the vehicle speed is lower than the preset vehicle speed threshold, then determine whether the braking operation intensity is less than or equal to the preset sealing threshold.

[0025] S200: If so, the electronic parking control valve is controlled to fill the parking chamber of the spring brake chamber with a preset sealing pressure value, so that the internal breather valve of the spring brake chamber is closed.

[0026] In this embodiment, the commercial vehicle with the air-pressure braking system is equipped with an electronic parking brake (EPB) system and a vehicle control unit (VECU). The VECU can transmit parking switch signals and vehicle speed signals to the electronic control unit of the EPB system via the CAN bus. Based on the parking switch signals and vehicle speed signals, it can be determined that the vehicle is in a parked state and the vehicle speed is lower than a preset speed threshold. For example, a parking switch signal of 1 indicates parking, and the preset speed threshold can be set to 5 km / h. If the parking switch signal is 1 and the vehicle speed signal is less than 5 km / h, it is determined that the vehicle is in a parked state and the vehicle speed is lower than the preset speed threshold.

[0027] It should be understood that the aforementioned preset sealing threshold is a threshold that can drive the internal breather valve to close. In step S200, if the braking operation intensity is less than or equal to the preset sealing threshold, the EPB electronic control unit sends an inflation command to the electronic parking control valve, and the electronic parking control valve inflates the parking chamber, causing the internal breather valve of the spring brake chamber to close.

[0028] This embodiment determines whether the vehicle is in a parking state and whether the vehicle speed is lower than a preset speed threshold, thus indicating that the vehicle is in the parking start-up phase. It further determines whether the braking operation intensity is less than or equal to a preset sealing threshold, and can identify whether the vehicle is in a "light braking start" condition while in a parking state. When the vehicle is lightly braking to start, the braking operation intensity is insufficient to close the internal breather valve. At this time, the electronic parking control valve is controlled to fill the parking chamber of the spring brake chamber with a preset sealing pressure value, so that the internal breather valve of the spring brake chamber is closed. After the internal breather valve is closed, there is no air leakage or whistling in the driving chamber and parking chamber, and the risk of brake system pressure drop and braking force weakening due to air leakage is reduced. This solves the technical problem of abnormal drop in vehicle brake air pressure and whistling in the related technology when the vehicle is starting.

[0029] Further, in one embodiment, determining whether the braking operation intensity is less than or equal to a preset sealing threshold may include: determining whether both the braking input intensity and the rate of change are less than or equal to the preset sealing threshold. In this embodiment, when determining the braking operation intensity, not only the braking input intensity is determined, but also the rate of change of the braking input is determined. Only when both conditions are met simultaneously is the inflation operation in step S200 performed. This setting can improve the accuracy of operating condition identification, eliminate interference from "sudden acceleration and shallow stop" and "deep acceleration and slow release," and avoid false triggering. Furthermore, by filtering out instantaneous signal fluctuations that do not meet both conditions, unnecessary opening and closing actions of the EPB control valve are reduced, solenoid valve wear is reduced, and actuator life is extended. At the same time, it avoids air pressure fluctuations caused by frequent inflation and deflation, prevents possible additional airflow noise, and further optimizes the NVH (noise, vibration, and harshness) performance of the entire vehicle.

[0030] Furthermore, in some embodiments, determining whether the braking input intensity and rate of change are both less than or equal to a preset sealing threshold may include: determining whether the driving brake pressure is less than or equal to a preset pressure value A and whether the pressure gradient is less than or equal to a preset gradient value B based on the air chamber driving chamber pressure P1.

[0031] See Figure 2As shown, this embodiment mainly targets vehicles equipped with EBS (Electronic Braking System). When the vehicle is equipped with an electronic braking system, in step S100, if it is determined whether the braking input intensity and rate of change are both less than or equal to a preset sealing threshold, the EPB electronic control unit calculates the air pressure service brake pressure gradient and determines whether the service brake pressure is less than or equal to a preset pressure value A and whether the pressure gradient is less than or equal to a preset gradient value B. If the service brake pressure P1 is less than or equal to the preset pressure value A (0 < P1 ≤ A) and the pressure gradient is less than or equal to the preset gradient value B (ΔP1 / Δt ≤ B), then step S200 is executed to control the electronic parking control valve to fill the parking chamber of the spring brake air chamber with a preset sealing pressure value, so that the internal breather valve of the spring brake air chamber is closed.

[0032] Furthermore, in one embodiment, determining whether the braking input intensity and rate of change are both less than or equal to a preset sealing threshold may include: determining whether the braking pedal travel is less than or equal to a preset travel value C and whether the pedal depressing rate is less than or equal to a preset rate value D based on the braking pedal travel S.

[0033] See Figure 2 As shown, this embodiment mainly targets vehicles equipped with ABS (Anti-lock Braking System). When the vehicle is equipped with an anti-lock braking system, in step S100, if it is determined whether the braking input intensity and rate of change are both less than or equal to a preset sealing threshold, the EPB electronic control unit calculates the braking pedal depressing rate and determines whether the braking pedal travel is less than or equal to a preset travel value C and whether the pedal depressing rate is less than or equal to a preset rate value D. If the braking pedal travel S is less than or equal to the preset travel value C (0 < S ≤ C (%)) and the pedal depressing rate is less than or equal to the preset rate value D (ΔS / Δt ≤ D (% / s)), then step S200 is executed, controlling the electronic parking control valve to fill the parking chamber of the spring brake chamber with a preset sealing pressure value, so that the internal breathing valve of the spring brake chamber is closed.

[0034] Furthermore, in one embodiment, the preset sealing pressure value is determined based on the minimum static shut-off pressure E of the dryer multi-loop valve. In this embodiment, the preset sealing pressure value P2 = E ± 0.3, where E (bar) is the minimum static shut-off pressure of the dryer multi-loop valve. By setting the preset sealing pressure value P2 to E ± 0.3 as the target pressure, this embodiment avoids over-inflation (wasting compressed air and increasing the air compressor load) or under-inflation (causing whistling), ensuring the system-level stability of the sealing pressure.

[0035] Furthermore, in some embodiments, before determining whether the braking operation intensity is less than or equal to a preset sealing threshold, the following may also be included: Step 1: Obtain the parking switch signal, vehicle speed signal, and air chamber pressure P1; or obtain the parking switch signal, vehicle speed signal, and brake pedal travel S.

[0036] Step 2: Determine whether the vehicle is in a parked state based on the parking switch signal, and determine whether the vehicle speed is lower than the preset vehicle speed threshold based on the vehicle speed signal.

[0037] See Figure 2 As shown, in this embodiment, when the vehicle is equipped with EBS (Electronic Braking System), the EPB receives the parking switch signal, vehicle speed signal, and air chamber pressure P1 from the CAN network. Initially, it determines whether the vehicle is in a parking state based on the parking switch signal and whether the vehicle speed is lower than a preset vehicle speed threshold based on the vehicle speed signal. When it is determined that the vehicle is in a parking state and the vehicle speed is lower than the preset vehicle speed threshold, it determines whether the braking operation intensity (including air chamber pressure P1 and pressure gradient) is less than or equal to a preset sealing threshold based on the air chamber pressure P1. If the braking operation intensity is less than or equal to the preset sealing threshold, it controls the electronic parking control valve to fill the parking chamber of the spring brake air chamber with a preset sealing pressure value, so that the internal breathing valve of the spring brake air chamber is closed.

[0038] See Figure 2 As shown, when the vehicle is equipped with ABS (Anti-lock Braking System), the EPB receives the parking switch signal, vehicle speed signal, and brake pedal travel S from the CAN network. Initially, it determines whether the vehicle is in a parking state based on the parking switch signal and whether the vehicle speed is lower than a preset speed threshold based on the vehicle speed signal. When it is determined that the vehicle is in a parking state and the vehicle speed is lower than the preset speed threshold, it determines whether the braking intensity (including brake pedal travel S and pedal depressor speed) is less than or equal to a preset sealing threshold based on the brake pedal travel S. If the braking intensity is less than or equal to the preset sealing threshold, it controls the electronic parking control valve to fill the parking chamber of the spring brake chamber with a preset sealing pressure value, thereby closing the internal breather valve of the spring brake chamber.

[0039] See Figure 2 As shown, in one embodiment, after step S200, the driver can manually release the parking brake and the vehicle can start normally.

[0040] In this embodiment, the EPB receives signals from the CAN network and calculates the air pressure rise gradient or the braking pedal depressing rate. It determines the limits of the air chamber driving chamber pressure and rise gradient or the pedal travel and depressing rate as the conditions for the EPB control valve to charge the spring air chamber parking chamber. This solves the problem of air leakage and whistling in the air chamber when starting from a parked position or lightly pressing the brake, reduces user complaints about whistling, and lowers the risk of reduced braking force and decreased air pressure in the braking system due to air leakage.

[0041] Secondly, embodiments of this application also provide an electronic parking system control device.

[0042] In one embodiment, the electronic parking system control device includes: an electronic control unit, which is used to determine whether the braking operation intensity is less than or equal to a preset sealing threshold if it is determined that the vehicle is in a parking state and the vehicle speed is lower than a preset vehicle speed threshold; the electronic control unit is also used to control the electronic parking control valve to fill the parking chamber of the spring brake chamber with a preset sealing pressure value if the braking operation intensity is less than or equal to the preset sealing threshold, so as to close the internal breathing valve of the spring brake chamber.

[0043] Furthermore, in one embodiment, see... Figure 2 As shown, the above-mentioned electronic parking system control device may also include a vehicle controller (VECU). The vehicle controller and the electronic control unit are connected via a CAN bus signal. The vehicle controller can send parking switch signals and vehicle speed signals to the electronic control unit. The electronic control unit can then determine that the vehicle is in a parking state and the vehicle speed is lower than a preset vehicle speed threshold based on the parking switch signals and vehicle speed signals.

[0044] Furthermore, in one embodiment, see... Figure 2 As shown, the electronic parking system control device may further include a service brake (EBS) system. The service brake (EBS) system is connected to the electronic control unit via a CAN bus signal and can send the air chamber pressure P1 to the electronic control unit. This embodiment is applicable to vehicles equipped with an EBS system.

[0045] Furthermore, in some alternative embodiments, see Figure 2 As shown, the electronic parking system control device may further include a service brake ABS system. The service brake ABS system is connected to the electronic control unit via a CAN bus signal and can send the brake pedal travel S to the electronic control unit. This embodiment is applicable to vehicles equipped with an ABS system.

[0046] The functions of each module in the above-mentioned electronic parking system control device correspond to the steps in the above-mentioned electronic parking system control method embodiment, and their functions and implementation processes will not be described in detail here.

[0047] Thirdly, this application provides a vehicle, which includes the aforementioned electronic parking system control device. The electronic parking system control device in this embodiment can be any of the electronic parking system control devices provided in the above embodiments and achieve the corresponding functions, which will not be elaborated further here.

[0048] Fourthly, embodiments of this application provide an electronic parking system control device, which can be a personal computer (PC), laptop computer, server, or other device with data processing capabilities. This device is connected to the vehicle via an on-board interface.

[0049] Reference Figure 3 , Figure 3 This is a schematic diagram of the hardware structure of the electronic parking system control device involved in the embodiments of this application. In the embodiments of this application, the electronic parking system control device may include a processor, a memory, a communication interface, and a communication bus.

[0050] The communication bus can be of any type and is used to interconnect the processor, memory, and communication interface.

[0051] The communication interface includes input / output (I / O) interfaces, physical interfaces, and logical interfaces used to interconnect devices within the electronic parking system control equipment, as well as interfaces used to interconnect the electronic parking system control equipment with other devices (such as other computing devices or user equipment). Physical interfaces can be Ethernet interfaces, fiber optic interfaces, ATM interfaces, etc.; user equipment can be displays, keyboards, etc.

[0052] Memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0053] The processor can be a general-purpose processor, which can call the electronic parking system control program stored in the memory and execute the electronic parking system control method provided in the embodiments of this application. For example, the general-purpose processor can be a central processing unit (CPU). The method executed when the electronic parking system control program is called can be referred to in the various embodiments of the electronic parking system control method of this application, and will not be repeated here.

[0054] Those skilled in the art will understand that Figure 3 The hardware structure shown does not constitute a limitation of this application and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0055] Fifthly, embodiments of this application also provide a readable storage medium.

[0056] The present application has an electronic parking system control program stored on a readable storage medium, wherein when the electronic parking system control program is executed by a processor, it implements the steps of the electronic parking system control method as described above.

[0057] The method implemented when the electronic parking system control program is executed can be referred to in various embodiments of the electronic parking system control method of this application, and will not be repeated here.

[0058] It should be noted that the sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0059] The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus. The terms "first," "second," and "third," etc., are used to distinguish different objects, etc., and do not indicate a sequence, nor do they limit "first," "second," and "third" to different types.

[0060] In the description of the embodiments of this application, terms such as "exemplary," "for example," or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplary," "for example," or "for instance" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary," "for example," or "for instance" is intended to present the relevant concepts in a concrete manner.

[0061] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0062] In some processes described in the embodiments of this application, multiple operations or steps are included in a specific order. However, it should be understood that these operations or steps may not be executed in the order they appear in the embodiments of this application, or they may be executed in parallel. The sequence number of the operation is only used to distinguish different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed sequentially or in parallel, and these operations or steps may be combined.

[0063] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device to execute the methods described in the various embodiments of this application.

[0064] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A control method for an electronic parking system, characterized in that, The electronic parking system control method includes: If it is determined that the vehicle is in a parked state and the vehicle speed is lower than the preset vehicle speed threshold, then it is determined whether the braking operation intensity is less than or equal to the preset sealing threshold. If so, the electronic parking brake control valve is controlled to fill the parking chamber of the spring brake chamber with a preset sealing pressure value, thereby closing the internal breather valve of the spring brake chamber.

2. The electronic parking system control method as described in claim 1, characterized in that, The determination of whether the braking operation intensity is less than or equal to a preset sealing threshold includes: Determine whether the braking input intensity and rate of change are both less than or equal to the preset sealing threshold.

3. The electronic parking system control method as described in claim 2, characterized in that, The determination of whether both the braking input intensity and the rate of change are less than or equal to a preset sealing threshold includes: Based on the air chamber pressure P1, determine whether the service braking pressure is less than or equal to the preset pressure value A, and whether the pressure gradient is less than or equal to the preset gradient value B.

4. The electronic parking system control method as described in claim 2, characterized in that, The determination of whether both the braking input intensity and the rate of change are less than or equal to a preset sealing threshold includes: Based on the brake pedal travel S, determine whether the brake pedal travel is less than or equal to the preset travel value C, and whether the pedal pressing rate is less than or equal to the preset rate value D.

5. The electronic parking system control method as described in claim 1, characterized in that, The preset sealing pressure value is determined based on the minimum static shut-off pressure E of the dryer multi-loop valve.

6. The electronic parking system control method as described in claim 1, characterized in that, Before determining whether the braking operation intensity is less than or equal to the preset sealing threshold, the following steps are also included: Acquire the parking switch signal, vehicle speed signal, and air chamber pressure P1; or acquire the parking switch signal, vehicle speed signal, and brake pedal travel S; The system determines whether the vehicle is in a parked state based on the parking switch signal, and determines whether the vehicle speed is lower than a preset speed threshold based on the vehicle speed signal.

7. An electronic parking system control device, characterized in that, The electronic parking system control device includes: The electronic control unit is used to determine whether the braking intensity is less than or equal to a preset sealing threshold if it is determined that the vehicle is in a parked state and the vehicle speed is lower than a preset vehicle speed threshold. The electronic control unit is also used to control the electronic parking control valve to fill the parking chamber of the spring brake chamber with a preset sealing pressure value if the braking operation intensity is less than or equal to a preset sealing threshold, so as to close the internal breathing valve of the spring brake chamber.

8. A vehicle, characterized in that, The vehicle includes: the electronic parking system control device as described in claim 7.

9. An electronic parking system control device, characterized in that, The electronic parking system control device includes a processor, a memory, and an electronic parking system control program stored in the memory and executable by the processor, wherein when the electronic parking system control program is executed by the processor, it implements the steps of the electronic parking system control method as described in any one of claims 1 to 6.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores an electronic parking system control program, wherein when the electronic parking system control program is executed by a processor, it implements the steps of the electronic parking system control method as described in any one of claims 1 to 6.

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