Vehicle abnormal power-on self-test method, device, medium and system

Abstract

The invention discloses a vehicle abnormal power-on self-test method, device, medium and system, and relates to the technical field of vehicles. The method is applied to a braking system of a vehicle and comprises the steps that when it is detected that the vehicle is in a preset power-on state and a driver steps on a pedal, a lead screw in a pressure buildup piston cavity is controlled to move based on preset static maximum target pressure and a preset pressure buildup slope so as to build PSU pressure; if it is detected that the PSU pressure does not meet the preset condition, an ESC module is controlled to execute pressure building operation based on the PSU pressure and the static maximum target pressure; when it is detected that the driver loosens the pedal, lead screw zero learning operation is executed; and if the lead screw learning zero operation is successful, executing preset self-checking operation. When a driver triggers the vehicle to be powered on by stepping on the pedal, the voltage building requirement of the driver can be responded preferentially, and power-assisted voltage building is achieved; if the power-assisted voltage buildup is insufficient, the ESC module intervenes in supplementary voltage buildup, and the lead screw zero learning and self-inspection are completed after the pedal is released, so that the accurate execution of the power-on self-inspection is ensured while the voltage buildup request in the power-on stage of the vehicle is ensured to be timely and reliably responded.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vehicles, and particularly relates to a vehicle abnormal power-on self-checking method, device, medium and system. BACKGROUND

[0002] In a modern automobile electronic control system, vehicle power-on self-checking has become a key standardized process to ensure driving safety. The process is automatically triggered when the vehicle is powered on and starts, and comprehensively verifies the functional state of key executive components in the braking system. Through the self-checking program, the system can identify potential faults or abnormalities at the initial power-on stage, thereby ensuring the reliability and functional integrity of the braking system before the vehicle is driven, and providing the driver with a braking assistance guarantee that meets safety requirements.

[0003] For new energy vehicles, the power-on process is usually triggered by stepping on the brake pedal. In some self-checking schemes, the system will first respond to the pedal operation and perform brake assist pressure building, and then perform self-checking. However, if the vehicle is in the restart condition after abnormal power-off, since the self-checking process has not been performed, directly performing the brake assist pressure building operation may cause abnormal system response or unreliable pressure building, thereby failing to ensure the safe execution of brake assist. SUMMARY

[0004] The embodiments of the present application provide a vehicle abnormal power-on self-checking method, device, medium and system, which can ensure that the pressure building request is responded to in a timely and reliable manner during the vehicle power-on stage, and ensure the accurate execution of power-on self-checking.

[0005] In a first aspect, the embodiments of the present application provide a vehicle abnormal power-on self-checking method applied to a braking system of a vehicle, and the method comprises:

[0006] When it is detected that the vehicle is in a preset power-on state and the driver steps on the pedal, a lead screw in a pressure building piston cavity is controlled to move based on a preset static maximum target pressure and a preset pressure building slope to build a PSU pressure;

[0007] If it is detected that the PSU pressure does not meet a preset condition, an ESC module is controlled to perform a pressure building operation based on the PSU pressure and the static maximum target pressure;

[0008] When it is detected that the driver releases the pedal, a lead screw learning zero operation is performed;

[0009] If the lead screw learning zero operation is successful, a preset self-checking operation is performed.

[0010] In further embodiments, the method comprises:

[0011] If a difference between the PSU pressure and the static maximum target pressure is greater than or equal to a preset threshold value and a duration reaches a preset duration, it is determined that the PSU pressure does not meet the preset condition.

[0012] When it is detected that the difference between the PSU pressure and the static maximum target pressure is less than a preset threshold, it is determined that the PSU pressure meets the preset condition.

[0013] In a further embodiment, based on the PSU pressure and the static maximum target pressure, the ESC module is controlled to perform a pressure building operation, including:

[0014] Subtracting the static maximum target pressure from the PSU pressure to obtain a pressure difference;

[0015] Based on the pressure difference, the ESC module is controlled to perform a pressure building operation.

[0016] In a further embodiment, the preset pressure building slope is less than or equal to a preset slope threshold.

[0017] In a further embodiment, the brake system includes a PSV valve connected between the pressure building piston cavity and a wheel end of the vehicle, and the PSV valve is a normally closed valve, and after the pressure building, the method includes:

[0018] Opening the PSV valve to transmit the PSU pressure to the wheel end;

[0019] Before performing the preset self-check operation, the PSV valve is closed.

[0020] In a further embodiment, performing the preset self-check operation includes:

[0021] Based on the preset target pressure, performing the pressure building operation according to the preset pressure building procedure, and performing the self-check operation during the pressure building;

[0022] If it is detected that the driver steps on the pedal, the pressure building operation and the self-check operation are suspended, and the PSU pressure is established based on the current pedal stroke;

[0023] If it is detected that the driver releases the pedal and the lead screw is returned to a preset position, the step of performing the pressure building operation according to the preset pressure building procedure based on the preset target pressure and performing the self-check operation during the pressure building is returned.

[0024] In a further embodiment, the method further includes:

[0025] When it is detected that the vehicle is powered on, a lead screw learning zero operation is performed;

[0026] If the lead screw learning zero operation fails, it is determined that the vehicle is in a preset power-on state.

[0027] In a second aspect, the embodiments of the present application provide a vehicle abnormal power-on self-check device, the device includes:

[0028] An assisting pressure building module is configured to, when it is detected that the vehicle is in a preset power-on state and the driver steps on the pedal, control a screw rod in a building piston cavity to build a PSU pressure based on a preset static maximum target pressure and a preset building pressure slope;

[0029] An ESC building pressure module is configured to, if it is detected that the PSU pressure does not meet a preset condition, control the ESC module to perform a building pressure operation based on the PSU pressure and the static maximum target pressure;

[0030] A screw rod learning zero module is configured to, when it is detected that the driver releases the pedal, perform a screw rod learning zero operation.

[0031] A self-checking module is configured to, if the screw rod learning zero operation is successful, perform a preset self-checking operation.

[0032] In a third aspect, an electronic device is provided, which includes a processor and a memory storing computer program instructions; and the processor implements the vehicle abnormal power-on self-checking method of any one of the above aspects when executing the computer program instructions.

[0033] In a fourth aspect, a computer readable storage medium is provided, which stores computer program instructions; and the computer program instructions are executed by a processor to implement the vehicle abnormal power-on self-checking method of any one of the above aspects.

[0034] In a fifth aspect, a computer program product is provided, and instructions in the computer program product are executed by a processor of an electronic device to cause the electronic device to perform the vehicle abnormal power-on self-checking method of any one of the above aspects.

[0035] In a sixth aspect, a brake system is provided, which includes a processor and a memory storing computer program instructions; and the processor implements the vehicle self-checking method of any one of the above aspects when executing the computer program instructions.

[0036] The vehicle abnormal power-on self-checking method, device, medium and system provided in the embodiments of the present application, the method is applied to a braking system of a vehicle, and the method comprises the following steps: when it is detected that the vehicle is in a preset power-on state and a driver steps on a pedal, a lead screw in a pressure building piston cavity is controlled to move to build a PSU pressure based on a preset static maximum target pressure and a preset pressure building slope; if it is detected that the PSU pressure does not meet a preset condition, an ESC module is controlled to perform a pressure building operation based on the PSU pressure and the static maximum target pressure; when it is detected that the driver releases the pedal, a lead screw learning zero operation is performed; and if the lead screw learning zero operation is successful, a preset self-checking operation is performed. In this way, in the embodiments of the present application, the vehicle power-on state and the driver pedal operation are comprehensively judged, the pressure building request can be responded to in time and the pressure building assistance can be performed when the driver triggers the vehicle power-on by stepping on the pedal; if the pressure building assistance is insufficient, the ESC module is used to assist in supplementing the pressure building, the lead screw learning zero operation is completed after the pedal is released, and the self-checking operation is performed on the basis of the successful lead screw learning zero operation, so that the timeliness of the pressure building response in the power-on stage and the smooth execution of the self-checking process are taken into account, and the reliable pressure building function can still be realized in the working condition that the vehicle is powered on again after abnormal power-off, thereby further improving the overall reliability of the system. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly introduced, and other drawings can be obtained by those of ordinary skill in the art without creative labor on the basis of these drawings.

[0038] Figure 1 FIG. 1 is a system architecture schematic diagram of a braking system provided in the embodiments of the present application;

[0039] Figure 2 FIG. 2 is one of the flow schematic diagrams of a vehicle abnormal power-on self-checking method provided in the embodiments of the present application;

[0040] Figure 3 FIG. 3 is the other of the flow schematic diagrams of the vehicle abnormal power-on self-checking method provided in the embodiments of the present application;

[0041] Figure 4 FIG. 4 is a structure schematic diagram of a vehicle abnormal power-on self-checking device provided in the embodiments of the present application;

[0042] Figure 5 FIG. 5 is a structure schematic diagram of an electronic device provided in the embodiments of the present application. DETAILED DESCRIPTION

[0043] The features and exemplary embodiments of the various aspects of the present application will be described in detail below with reference to the drawings. For the purpose of clarity, technical terms may be defined herein before being consistently used throughout the specification. Embodiments described herein are intended to address various gaps in the art found at the time the application was made. However, it should be understood that some embodiments can address more than one of the various gaps in the art found at the time the application was made. While multiple embodiments are disclosed, still other embodiments will become apparent to those skilled in the art from the following detailed description, which shows and describes illustrative embodiments.

[0044] It should be noted that the terms such as first and second, etc., are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between such entities or operations. Also, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by an "includes" statement does not exclude the existence of additional elements in the process, method, article, or apparatus that includes the element.

[0045] To solve the problems in the prior art, the embodiments of the present application provide a vehicle abnormal power-on self-test method, device, medium and system. First, the vehicle abnormal power-on self-test method provided by the embodiments of the present application will be introduced. A vehicle abnormal power-on self-test method is applied to a braking system of a vehicle, the braking system comprising a CSV valve, a PSV valve and an SSV valve, the CSV valve being a normally open valve, and the PSV valve and the SSV valve being normally closed valves.

[0046] Please refer to Figure 1 , which shows a system architecture schematic diagram of the braking system provided by the embodiments of the present application, as Figure 1 shown, the braking system further comprises an auxiliary pressure building module 1 and an oil can module 2, the CSV valve is connected with the oil can module 2, a pedal of the vehicle and a wheel end module respectively, and the PSV valve is connected with the CSV valve and the auxiliary pressure building module 1 respectively. When the driver steps on the pedal, if the functions of each module are normal, the braking system can directly establish braking force through a mechanical path from the pedal to the wheel end module through the CSV valve, or establish braking force through the auxiliary pressure building module 1 and transmit the braking force to the wheel end module by controlling the opening and closing of the corresponding valves.

[0047] It should be noted that two CSV valves and PSV valves are arranged in the embodiments of the present application to construct two independent braking channels, and the number of valve bodies can be increased or decreased according to actual application requirements in other embodiments.

[0048] Figure 2 One of the flow diagrams of the vehicle abnormal power-on self-checking method provided by the embodiments of the present application is shown in FIG. 1. Figure 2 As shown in FIG. 1, the method comprises the following steps:

[0049] S101, when it is detected that the vehicle is in a preset power-on state and the driver steps on the pedal, a lead screw in a pressure building piston cavity is controlled to move to build a PSU pressure based on a preset static maximum target pressure and a preset pressure building slope.

[0050] Figure 3 Another flow diagram of the vehicle abnormal power-on self-checking method provided by the embodiments of the present application is shown in FIG. 2. Figure 3 As shown in FIG. 2, in the embodiments of the present application, when it is detected that the vehicle is powered on, the system will complete the lead screw zero learning operation and other actuator initialization operations within a reserved initialization time (such as 1 second). The lead screw zero learning is a calibration step for determining the mechanical zero point of the lead screw, which is used to ensure that the braking system is accurate and consistent at the initial position, thereby establishing a correct reference for subsequent control. In the embodiments of the present application, the lead screw zero learning is part of the system initialization process, and its specific implementation method belongs to the conventional technical means, so it will not be described further. After the initialization is completed, the braking system will enter the unassisted mode.

[0051] In this step, if the lead screw zero learning operation fails, it is determined that the vehicle is in the preset power-on state. Specifically, before the vehicle is started each time, if the functions of each module are normal and the vehicle completes the normal power-off process, the lead screw in the pressure building piston cavity should be at the initial mechanical zero position, and at this time, the lead screw zero learning operation is usually successful. Therefore, if the lead screw zero learning operation fails when the vehicle is powered on, it can be determined that the vehicle is in the abnormal power-on state after power-off (i.e., the above-mentioned preset power-on state), and in this case, the assist pressure building function of the vehicle may not be able to meet the pressure building performance requirements expected by the driver.

[0052] In the embodiments of the present application, when the vehicle is powered on, the power-on state of the vehicle can be accurately identified by performing the lead screw zero learning operation and determining the power-on state of the vehicle according to the zero learning operation result, so that the key decision basis for the self-checking strategy of the vehicle power-on start in the subsequent steps can be provided to guarantee the reliable implementation of the pressure building function before the self-checking operation is performed.

[0053] When it is detected that the vehicle is in the power-on state of abnormal power-off and power-on, and the driver steps on the pedal, the embodiment of the application will immediately respond to the driver's request for pressure building and perform the operation of assisting pressure building. Specifically, the system will directly use the preset static maximum target pressure as the pressure building target to prevent the vehicle from sliding downhill. Subsequently, according to the preset pressure building slope and pressure building target, the screw rod pushes the piston to reduce the closed volume in the pressure building piston cavity (PSU cavity), so as to compress the liquid in the cavity, build the PSU pressure, and realize the Plunger pressure building.

[0054] Further, in the embodiment of the application, the preset pressure building slope is less than or equal to a preset slope threshold (such as 80 bar / s). In the normal driving state of the vehicle, the pressure building slope is usually high to achieve the rapid response of pressure building demand. However, the embodiment of the application is applied to the scenario when the vehicle is just powered on and started, at which time the PSV valve is not powered on and is in the closed state. If the pressure building slope is too high, the PSU pressure may rise too fast, which may cause impact or even damage to the PSV valve. Therefore, in this step, the system limits the pressure building slope to be not more than the pressure building slope in the normal driving state of the vehicle (such as 80 bar / s).

[0055] In the embodiment of the application, by limiting the pressure building slope in the Plunger pressure building process, the impact of the sudden rise of the PSU pressure on the PSV valve in the unpowered state can be prevented, the reliable protection of the PSV valve is realized, and the stability and service life of the system are improved.

[0056] S102, if it is detected that the PSU pressure does not meet the preset condition, the ESC module is controlled to perform the pressure building operation based on the PSU pressure and the static maximum target pressure.

[0057] In the embodiment of the application, if the difference between the PSU pressure and the static maximum target pressure is greater than or equal to a preset threshold, and the duration reaches a preset duration, it is determined that the PSU pressure does not meet the preset condition; when it is detected that the difference between the PSU pressure and the static maximum target pressure is less than the preset threshold, it is determined that the PSU pressure meets the preset condition.

[0058] As Figure 3As shown, in the process of assisting pressure building, if the difference between the actual built PSU pressure and the target pressure (i.e. the above-mentioned pressure building target) is always greater than a preset threshold (for example, the difference between the target force and the actual force is always greater than 3 bar), it indicates that the assisting pressure building module may have a fault and cannot normally provide the required braking force (i.e. the actual PSU pressure cannot reach the actual PFS pressure), at this time, it is determined that the PSU pressure does not meet the preset condition. Subsequently, the system will calculate the pressure difference between the static maximum target pressure and the PSU pressure, and control the ESC module to perform pressure building operation based on the difference to realize pressure building.

[0059] The embodiment of the present application can accurately evaluate whether the pressure building performance of the assisting pressure building module meets the requirements by analyzing the difference between the actual PSU pressure and the target pressure. If the performance does not meet the requirements, the ESC module is controlled to intervene in pressure building according to the difference, so that the reliable implementation of the pressure building function can be guaranteed in the case that the vehicle is in the state of abnormal power-on after power-off and the self-checking operation is not performed, and the overall reliability of the system is effectively improved.

[0060] S103, when it is detected that the driver releases the pedal, performing a lead screw zero operation.

[0061] In this step, when it is detected that the driver releases the pedal, the Plunger pressure building operation does not need to be continued. At this time, the system will perform a lead screw zero operation again. Since the lead screw zero operation belongs to a conventional technical means, the specific implementation process is not expanded in the embodiment of the present application.

[0062] The embodiment of the present application provides a judgment basis for the subsequent steps by performing a lead screw zero operation after the driver releases the pedal. The system can determine whether to enter the self-checking process according to the result of the lead screw zero operation, so as to ensure that the self-checking is performed in the expected state of the braking system and guarantee the effectiveness of the self-checking result.

[0063] S104, if the lead screw zero operation is successful, performing a preset self-checking operation.

[0064] Specifically, if the lead screw zero operation is successful, it means that the lead screw has accurately returned to the preset initial mechanical zero position, thereby establishing an absolutely reliable reference for the subsequent self-checking process. The self-checking in this state can effectively eliminate the position error that may be accumulated in the system during operation, and more truly reflect the mechanical performance and running state of the braking system itself, thereby significantly improving the accuracy and reliability of the self-checking result.

[0065] It should be noted that the brake system includes a PSV valve connected between the pressure building piston cavity and the wheel end of the vehicle, and the PSV valve is a normally closed valve. After pressure building, the system first opens the PSV valve to transmit the PSU pressure to the wheel end, thereby ensuring the realization of the pressure building function. Before the execution of the preset self-checking operation, the PSV valve is closed to build an isolated environment suitable for self-checking.

[0066] As shown in Figure 3 After entering the preset self-checking operation, the system first closes the PSV valve to build a self-checking environment, and then performs a pressure building operation according to a preset pressure building process based on a preset target pressure, and performs a self-checking operation during the pressure building process.

[0067] Specifically, the pressure building process includes a pressure increasing step, a pressure maintaining step and a pressure releasing step. The duration of the pressure maintaining step is greater than the duration of the pressure releasing step, and the duration of the pressure releasing step is greater than the duration of the pressure increasing step, thereby ensuring the pressure building efficiency while taking into account the system stability and the service life of the components. In an example, in the embodiment of the present application, the pressure building process includes a 0.4-second pressure increasing operation, a 1-second pressure maintaining operation and a 0.6-second pressure releasing operation in sequence.

[0068] During the pressure building process, the system at least detects the pressure following performance of the brake system, the sealing state of the pressure building piston cavity and the zero position self-learning effectiveness of the lead screw. If the detection results all meet the preset indicators, the current self-checking process is normally ended, and a subsequent operation stage is entered. Otherwise, the system exits the current self-checking process and reenters the non-assisted mode.

[0069] As shown in Figure 3 In the embodiment of the present application, during the self-checking process, it is continuously determined whether the driver has a pressure building request (i.e., whether the pedal is stepped on). If it is detected that the driver steps on the pedal, the pressure building operation and the self-checking operation are suspended, and the PSV valve is opened. The PSU pressure is established based on the current pedal stroke. If it is detected that the driver releases the pedal and the lead screw is returned to the preset position, the step of closing the PSV valve is returned.

[0070] Specifically, in the embodiment of the present application, a software zero position corresponding to the mechanical zero position is arranged in the pressure building piston cavity. In an example, the distance between the software zero position and the mechanical zero position of the lead screw is 1 mm. To further improve the fault tolerance of the system, the software zero position actually allows a position error of ±0.1 mm. Therefore, after the execution of the pressure building operation, when it is detected that the lead screw is returned to a position 0.1 mm away from the software zero position (i.e., the lead screw is returned to the mechanical zero position), the self-checking process is normally ended, and a subsequent operation stage is entered. Figure 3When the distance from the mechanical zero position is 1.1 mm as shown, the preset self-check operation can be triggered, thereby effectively avoiding mechanical collision between the lead screw and the pressure-building piston chamber, and thus preventing abnormal noise.

[0071] During the self-test, once a pressure build-up request is detected from the driver, the system will immediately respond and execute the pressure build-up operation. It will then continuously monitor for new pressure build-up requests and check if the lead screw has returned to the preset position (1.1 mm from the mechanical zero position). If no pressure build-up request is confirmed and the lead screw has returned to the preset position, the system will close the PSV valve after a 3-second delay, re-enter the preset pressure build-up process, and continue executing the self-test operation.

[0072] Understandably, during the self-test process, if the self-test is interrupted three or more times due to the driver's pressure build-up requests, and all pressure build-up requests are successful, it indicates that the braking system is functioning normally, and the current self-test process can be terminated directly to proceed to the subsequent operation stage.

[0073] The vehicle abnormal power-on self-test method of this application embodiment is applied to the vehicle's braking system. The method includes: when the vehicle is detected to be in a preset power-on state and the driver depresses the pedal, controlling the movement of the lead screw in the pressure-building piston chamber based on a preset static maximum target pressure and a preset pressure-building slope to build up PSU pressure; if the PSU pressure is detected to be not satisfied with the preset conditions, then controlling the ESC module to perform a pressure-building operation based on the PSU pressure and the static maximum target pressure; when the driver releases the pedal, performing a lead screw zero-learning operation; if the lead screw zero-learning operation is successful, then performing a preset self-test operation. Thus, in this embodiment, by comprehensively judging the vehicle's power-on status and the driver's pedal operation, the system can promptly respond to the pressure-building request and perform assisted pressure-building when the driver triggers the vehicle's power-on by pressing the pedal. If the assisted pressure-building is insufficient, the ESC module assists in supplementing the pressure-building. After the pedal is released, the lead screw learns zero operation, and a self-test operation is performed based on the successful learns zero operation. This not only takes into account the timeliness of the pressure-building response during the power-on phase and the smooth execution of the self-test process, but also ensures that the vehicle can still achieve reliable pressure-building function when it is abnormally powered off and then powered on again, thereby further improving the overall reliability of the system.

[0074] Based on the vehicle abnormal power-on self-test method provided in the above embodiments, this application also provides a specific implementation of the vehicle abnormal power-on self-test device. Please refer to the following embodiments.

[0075] like Figure 4 As shown in the embodiment of this application, the vehicle abnormal power-on self-test device is applied to the vehicle's braking system. The device includes:

[0076] The pressure building assistance module 401 is configured to, when it is detected that the vehicle is in a preset power-on state and the driver steps on the pedal, control the movement of the lead screw in the pressure building piston cavity based on a preset static maximum target pressure and a preset pressure building slope, so as to build the PSU pressure.

[0077] The ESC pressure building module 402 is configured to, if it is detected that the PSU pressure does not meet a preset condition, control the ESC module to perform a pressure building operation based on the PSU pressure and the static maximum target pressure.

[0078] The lead screw learning zero module 403 is configured to, when it is detected that the driver releases the pedal, perform a lead screw learning zero operation.

[0079] The self-checking module 404 is configured to, if the lead screw learning zero operation is successful, perform a preset self-checking operation.

[0080] Figure 5 A hardware structure schematic diagram of an electronic device is shown.

[0081] The electronic device can include a processor 601 and a memory 602 having computer program instructions stored therein.

[0082] Specifically, the processor 601 can include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement one or more embodiments of the present application.

[0083] The memory 602 can include a mass storage for data or instructions. By way of example and not limitation, the memory 602 can include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. The memory 602 can include removable or non-removable (or fixed) media, where appropriate. The memory 602 can be internal or external to the integrated gateway disaster recovery device, as appropriate. In certain embodiments, the memory 602 is non-volatile, solid-state memory.

[0084] In particular embodiments, the memory 602 can include read-only memory (ROM), random-access memory (RAM), magnetic disk storage mediums, optical storage mediums, flash memory devices, electrical, optical, or other physical / tangible memory storage devices. Thus, in general, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., a memory device) encoded with software that, when executed (by one or more processors), is operable to perform the operations described with reference to the methods according to an aspect of the present disclosure.

[0085] The processor 601 implements the vehicle abnormal power-on self-test method of any of the above embodiments by reading and executing computer program instructions stored in the memory 602.

[0086] In one example, the electronic device can further include a communication interface 603 and a bus 610. Wherein, as shown, the processor 601, the memory 602, the communication interface 603 are connected through the bus 610 and complete the communication between each other. Figure 5

[0087] The communication interface 603 is mainly used to realize the communication between each module, device, unit and / or equipment in the embodiments of the present application.

[0088] The bus 610 includes hardware, software or both to couple components of the electronic device to each other. By way of example, and not limitation, the bus can include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an InfiniBand interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or another suitable bus or combination of two or more of these. Where appropriate, the bus 610 can include one or more buses. Although the present application describes and illustrates a particular bus, the present application contemplates any suitable bus or interconnect.

[0089] The electronic device can perform the vehicle self-test method in the embodiments of the present application, thereby realizing the vehicle abnormal power-on self-test method and device described in combination Figure 1 and Figure 4 described.

[0090] ​In addition, in combination with the vehicle abnormal power-on self-checking method in the above embodiments, an embodiment of the present application can provide a computer readable storage medium for implementation. The computer readable storage medium has computer program instructions stored thereon; the computer program instructions are executed by a processor to implement any one of the vehicle abnormal power-on self-checking methods in the above embodiments.

[0091] In combination with the vehicle abnormal power-on self-checking method in the above embodiments, an embodiment of the present application can provide a computer program product, instructions in the computer program product are executed by a processor of an electronic device to cause the electronic device to perform the vehicle abnormal power-on self-checking method in any one of the above embodiments.

[0092] In combination with the vehicle abnormal power-on self-checking method in the above embodiments, an embodiment of the present application can provide a braking system for implementation. The braking system includes at least one of the following: the vehicle abnormal power-on self-checking device as above; the computer readable storage medium as above; the computer program product as above; the processor and the memory having computer program instructions stored thereon; the processor executes the computer program instructions to implement the vehicle abnormal power-on self-checking method in any one of the above embodiments.

[0093] It needs to be clear that the present application is not limited to the specific configurations and processes described above and shown in the drawings. For the sake of brevity, detailed descriptions of well-known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present application are not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between steps, after understanding the spirit of the present application.

[0094] The functional blocks shown in the above structural block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a functional card, etc. When implemented in software, the elements of the present application are program or code segments used to perform the required tasks. The program or code segments can be stored in a machine readable medium or transmitted through a data signal carried in a carrier wave over a transmission medium or communication link. The "machine readable medium" can include any medium capable of storing or transmitting information. Examples of the machine readable medium include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segments can be downloaded via a computer network such as the Internet, an intranet, etc.

[0095] It is also need to be explained that the example embodiments mentioned in the present application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above steps, that is, the steps can be executed in the order mentioned in the embodiments, can be different from the order in the embodiments, or several steps are executed simultaneously.

[0096] The computer program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other processing device to cause a series of operational steps to be performed on the computer, other programmable apparatus or other processing device to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions / acts specified in the flowchart and / or block diagram block or blocks.

[0097] The above is merely specific implementation of the present application, and those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described system, module and unit can refer to the corresponding process in the foregoing method embodiments, which will not be described herein. It should be understood that the protection scope of the present application is not limited to this, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed in the present application, and these modifications or replacements shall be covered within the protection scope of the present application.

Claims

1. A method of vehicle abnormal power-on self-test, the method comprising: A method applied to a brake system of a vehicle, the method comprising: when it is detected that the vehicle is in a preset power-on state and a driver steps on a pedal, controlling a screw rod in a pressure building piston cavity to build a PSU pressure based on a preset static maximum target pressure and a preset pressure building slope; if it is detected that the PSU pressure does not satisfy a preset condition, controlling an ESC module to perform a pressure building operation based on the PSU pressure and the static maximum target pressure; when it is detected that the driver releases the pedal, performing a screw rod learning zero operation; if the screw rod learning zero operation is successful, performing a preset self-check operation.

2. The vehicle abnormal power-on self-test method of claim 1, wherein, The method comprises: if a difference between the PSU pressure and the static maximum target pressure is greater than or equal to a preset threshold value and a duration reaches a preset duration, it is determined that the PSU pressure does not satisfy the preset condition; when it is detected that the difference between the PSU pressure and the static maximum target pressure is less than the preset threshold value, it is determined that the PSU pressure satisfies the preset condition.

3. The vehicle abnormal power-on self-test method of claim 1, wherein, The controlling the ESC module to perform the pressure building operation based on the PSU pressure and the static maximum target pressure comprises: subtracting the PSU pressure from the static maximum target pressure to obtain a pressure difference value; controlling the ESC module to perform the pressure building operation based on the pressure difference value.

4. The vehicle abnormal power-on self-test method of claim 1, wherein, The preset pressure building slope is less than or equal to a preset slope threshold value.

5. The vehicle abnormal power-on self-test method of claim 1, wherein, The brake system comprises a PSV valve connected between the pressure building piston cavity and a wheel end of the vehicle, and the PSV valve is a normally closed valve, and after pressure building, the method comprises: opening the PSV valve to transmit the PSU pressure to the wheel end; before the performing the preset self-check operation, closing the PSV valve.

6. The vehicle abnormal power-on self-test method of claim 1, wherein, The performing the preset self-check operation comprises: performing a pressure building operation according to a preset pressure building process based on a preset target pressure, and performing a self-check operation in a pressure building process; if it is detected that the driver steps on the pedal, pausing the pressure building operation and the self-check operation, and establishing the PSU pressure based on a current pedal stroke; if it is detected that the driver releases the pedal and the screw rod is returned to a preset position, returning to the performing the pressure building operation according to the preset pressure building process based on the preset target pressure, and the performing the self-check operation in the pressure building process.

7. The vehicle abnormal power-on self-test method of claim 1, wherein, The method further comprises: when it is detected that the vehicle is powered on, performing the screw rod learning zero operation; if the screw rod learning zero operation fails, determining that the vehicle is in the preset power-on state.

8. A vehicle abnormal power-on self-test device, comprising: A device applied to a brake system of a vehicle, the device comprising: an auxiliary pressure building module configured to, when it is detected that the vehicle is in a preset power-on state and a driver steps on a pedal, control a screw rod in a pressure building piston cavity to build a PSU pressure based on a preset static maximum target pressure and a preset pressure building slope; an ESC pressure building module configured to, if it is detected that the PSU pressure does not satisfy a preset condition, control an ESC module to perform a pressure building operation based on the PSU pressure and the static maximum target pressure; a screw rod learning zero module configured to, when it is detected that the driver releases the pedal, perform a screw rod learning zero operation; The self-checking module is configured to perform a preset self-checking operation if the screw rod learning operation is successful.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium stores at least one instruction or at least one program, and the at least one instruction or at least one program is loaded and executed by the processor to implement the vehicle abnormal power-on self-checking method according to any one of claims 1-7.

10. A brake system characterized by, The brake system comprises a processor and a memory storing computer program instructions; and the processor executes the computer program instructions to implement the vehicle abnormal power-on self-checking method according to any one of claims 1-7.

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