Electronic parking brake system activation method and system, storage medium and electronic equipment

Abstract

The invention discloses an electronic parking brake system activation method and system, a storage medium and electronic equipment. The activation method comprises the steps that whether the brake fluid complete leakage state is true or not is judged; when the brake fluid complete leakage state is true, whether the function of the electronic parking brake system is normal or not is judged; and when the brake fluid complete leakage state is true and the function of the electronic parking brake system is normal, whether a brake pedal signal is set or not is judged. The activation system is used for executing the activation method. A storage medium stores a computer program for operating an electronic parking brake system activation method. The electronic device is used for executing the activation method. Whether the brake fluid is completely leaked or not is judged, when the brake fluid is completely leaked and is true, the emergency brake double flash is actively activated, the rear wheel anti-lock function is started, meanwhile, the electronic parking brake system is actively clamped for braking, and the problem that the vehicle cannot be braked when the vehicle is not braked through hydraulic pressure is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile braking, and in particular relates to an activation method, system, storage medium and electronic equipment of an electronic parking brake system. Background Art

[0002] The electronic hydraulic brake system (EHBI) has basic power assist function, stability control function and many other additional functions. It senses the driver's intention through the built-in pedal displacement sensor and realizes hydraulic brake assist through the active pressure building unit.

[0003] The relevant technology is basically completely dependent on hydraulic braking, and brake fluid is a very important component. When a car is driving on various harsh roads, there is a great possibility of scratching or breaking the brake lines, causing rapid leakage of brake fluid. No matter what kind of electronic booster the vehicle is equipped with, the lack of brake fluid will inevitably lead to weak braking or even no braking. When the brake fluid just starts to leak, the basic braking of EHBI or mechanical backup can still be used for small deceleration braking. However, after the brake fluid is completely leaked, the wheel cylinder cannot generate hydraulic pressure, and the vehicle is in a state of no hydraulic braking force at all. The vehicle cannot stop, and safety accidents are very likely to occur in dangerous places such as highways, endangering the lives of people in the car. Summary of the invention

[0004] The purpose of the present invention is to provide an electronic parking brake system activation method, system, storage medium and electronic device to solve the problems in the prior art.

[0005] To this end, the present invention provides an electronic parking brake system activation method, system, storage medium and electronic device, including:

[0006] An electronic parking brake system activation method, comprising:

[0007] Determine whether the brake fluid complete leakage state is true;

[0008] In the state that the brake fluid is completely leaked, determining whether the electronic parking brake system functions normally;

[0009] When the brake fluid is completely leaked and the electronic parking brake system functions normally, determining whether the brake pedal signal is set;

[0010] When the brake fluid complete leakage state is true, the electronic parking brake system functions normally and the brake pedal signal is set, a rear wheel anti-lock function start request is sent and the electronic parking brake system is requested to start braking.

[0011] As a further description of the above technical solution, when the brake fluid complete leakage state is true, the electronic parking brake system functions normally and the brake pedal signal is set, a double flash start request is sent to actively activate the double flash.

[0012] As a further description of the above technical solution, in the state where the brake fluid is completely leaked and the electronic parking brake system is not functioning normally,

[0013] When the brake fluid complete leakage state is true, the electronic parking brake system functions normally, and the brake pedal signal is not in the set state, the electronic parking brake system is not activated.

[0014] As a further description of the above technical solution, a method for determining whether the brake fluid complete leakage state is true includes:

[0015] Determine whether the oil tank liquid level is below the lowest scale line, and whether the liquid level sensor reports a low liquid level fault;

[0016] If yes, then determine whether the brake pedal travel is greater than a first preset threshold and whether the brake master cylinder pressure is less than a second preset threshold;

[0017] If so, determine whether the accumulated time meets the preset time;

[0018] If so, the brake fluid leakage state is true.

[0019] As a further description of the above technical solution, when judging whether the oil tank liquid level is lower than the lowest scale line and whether the liquid level sensor reports a low liquid level fault, if not, the brake fluid complete leakage state is false.

[0020] As a further description of the above technical solution, when judging whether the brake pedal stroke is greater than a first preset threshold and whether the brake master cylinder pressure is less than a second preset threshold, if not, the brake fluid complete leakage state is false.

[0021] As a further description of the above technical solution, when judging whether the accumulated time meets the preset time, if not, the brake fluid complete leakage state is false.

[0022] Also included is an electronic parking brake system activation system, which is used to execute any of the electronic parking brake system activation methods described above.

[0023] Also included is a computer-readable storage medium storing a computer program for executing the electronic parking brake system activation method, wherein the computer program enables a computer to execute any of the above-described electronic parking brake system activation methods.

[0024] Also included is an electronic device, comprising:

[0025] one or more processors; memory; and

[0026] One or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the programs including instructions for executing any one of the above-mentioned electronic parking brake system activation methods.

[0027] Beneficial effects:

[0028] 1. The present invention provides an activation method for an electronic parking brake system, which determines whether the brake fluid is completely leaked. When the brake fluid is completely leaked, the emergency brake double flash is actively activated, the rear wheel anti-lock function is started, and the electronic parking brake system is actively clamped for braking, so as to solve the problem that the vehicle cannot be stopped when there is no hydraulic brake. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic flow chart of an electronic parking brake system activation method provided by the present invention.

[0031] Figure 2 A schematic diagram of a flow chart for determining whether a brake fluid complete leakage state is true in a method for activating an electronic parking brake system provided by the present invention. DETAILED DESCRIPTION

[0032] The content of the present invention can be more easily understood by selecting the following detailed description of the preferred implementation method of the present invention and the embodiments included. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those of ordinary skill in the art to which the present invention belongs. When there is a conflict, the definition in this specification shall prevail.

[0033] The disclosed embodiment provides an electronic parking brake system activation method, which solves the problem in the prior art that when the brake fluid in the integrated electronic hydraulic brake system (EHBI) is completely leaked, the wheel cylinder cannot generate hydraulic pressure, the vehicle is in a state of no hydraulic braking force, the vehicle cannot be stopped, and accidents are prone to occur.

[0034] The technical concept of the present disclosure is to judge whether the brake fluid is completely leaked. When the brake fluid is completely leaked, the emergency brake double flash is actively activated, the rear wheel anti-lock function is started, and the electronic parking brake system is actively clamped for braking, so as to solve the problem that the vehicle cannot be stopped when there is no hydraulic brake.

[0035] Embodiment 1:

[0036] like Figure 1-2 As shown, a method for activating an electronic parking brake system includes:

[0037] Determine whether the brake fluid complete leakage state is true;

[0038] In the state that the brake fluid is completely leaked, judging whether the electronic parking brake system functions normally, wherein whether the electronic parking brake system functions normally can be detected and judged by the vehicle ECU self-check;

[0039] When the brake fluid complete leakage state is true and the electronic parking brake system functions normally, it is determined whether the brake pedal signal is set. Whether the brake pedal signal is set is determined whether the brake pedal is pressed, so as to determine whether the driver has the intention to brake. When the brake pedal is pressed, a signal is generated through the state change of the Hall sensor or the variable resistance sensor and sent to the vehicle computer (ECU), thereby realizing the determination of whether the brake pedal is set.

[0040] When the brake fluid complete leakage state is true, the electronic parking brake system functions normally and the brake pedal signal is set, a rear wheel anti-lock function start request is sent and the electronic parking brake system is requested to start braking, and a double flash start request is sent to actively activate the double flash, which can remind surrounding vehicles that the vehicle has an abnormal situation, effectively improving safety.

[0041] Optionally, when the brake fluid is completely leaked, the electronic parking brake system is not functioning normally, and when the brake fluid is completely leaked, the electronic parking brake system is functioning normally, and the brake pedal signal is not set, the electronic parking brake system is not started. That is, when the brake fluid is completely leaked, the electronic parking brake system is functioning normally, and the brake pedal signal is set, the rear wheel anti-lock function and the electronic parking brake system are not started.

[0042] Optionally, the method for determining whether the brake fluid complete leakage state is true includes:

[0043] Determine whether the brake fluid tank level is below the lowest scale line, and whether the level sensor reports a low level fault. If not, the brake fluid is completely leaking, which is false.

[0044] If yes, then determine whether the brake pedal stroke is greater than a first preset threshold, and whether the brake master cylinder pressure is less than a second preset threshold. If not, the brake fluid complete leakage state is false.

[0045] If yes, then determine whether the accumulated time meets the preset time, if not, the brake fluid complete leakage state is false;

[0046] If so, the brake fluid leakage state is true.

[0047] Among them, when the brake pedal stroke is greater than the first preset threshold and the brake master cylinder pressure is lower than the second preset threshold, the cumulative time starts to be calculated. At the same time, the cumulative time needs to refer to the low fluid level fault and the brake pedal stroke is greater than the first preset threshold and the brake master cylinder pressure is lower than the second preset threshold, that is, the sum of the time when the two faults exist at the same time. When the conditions are not met, the previously accumulated time will be reduced accordingly. When the conditions are met, the accumulated time is accumulated according to the time period.

[0048] In some embodiments, when the liquid level of the brake fluid tank drops by more than a preset liquid level value within a certain period of time, and the pressure of the brake master cylinder drops by more than a preset pressure value within a certain period of time, it is determined that there is a risk of rapid leakage of the brake fluid. At this time, if the brake pedal is pressed, that is, the brake pedal signal is set, a request to start the rear wheel anti-lock function is sent and the electronic parking brake system is requested to start braking, and a double flash start request is sent, the double flash is actively activated and a prompt sound is issued. Before the brake fluid leaks completely, the integrated electronic hydraulic brake system cooperates with the electronic parking brake system to achieve braking of the vehicle, and can effectively perform early warning auxiliary braking before the brake fluid of the vehicle leaks completely, thereby improving safety.

[0049] Embodiment 2:

[0050] The EHBI (integrated electronic hydraulic brake system product) equipped with this invention is placed in a safe test site, the brake fluid in the brake pipe and the oil tank is drained, the initial speed is 30km / h, the brake pedal is pressed, the pedal is in place, and the instrument emergency double flash is observed to be activated, accompanied by a double flash prompt sound to remind people inside and outside the vehicle, and the vehicle can be braked to a steady stop at a deceleration of >0.2g;

[0051] When driving an EHBI (integrated electronic hydraulic brake system product) product that is not equipped with this invention and operating it under the same working conditions, the instrument panel will not activate the emergency double flash, there will be no prompt sound, the vehicle will not brake, and it will be impossible to stop.

[0052] Embodiment 3:

[0053] An activation system for an electronic parking brake system, which is used to execute any of the above activation methods for an electronic parking brake system, specifically comprising:

[0054] Determine whether the brake fluid complete leakage state is true;

[0055] In the state that the brake fluid is completely leaked, determining whether the electronic parking brake system functions normally;

[0056] When the brake fluid is completely leaked and the electronic parking brake system functions normally, determining whether the brake pedal signal is set;

[0057] When the brake fluid complete leakage state is true, the electronic parking brake system functions normally and the brake pedal signal is set, a rear wheel anti-lock function start request is sent and the electronic parking brake system is requested to start braking.

[0058] Among them, the computer-readable storage medium can be a computer storage medium or a communication medium. The communication medium includes any medium that facilitates the transmission of a computer program from one place to another. The computer storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer. For example, a computer-readable storage medium is coupled to a processor so that the processor can read information from the computer-readable storage medium and write information to the computer-readable storage medium. Of course, the computer-readable storage medium can also be a component of the processor. The processor and the computer-readable storage medium can be located in an application-specific integrated circuit (ASIC). In addition, the ASIC can be located in a user device. Of course, the processor and the computer-readable storage medium can also exist in a communication device as discrete components.

[0059] Specifically, the computer readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory, electrically erasable programmable read-only memory, erasable programmable read-only memory, programmable read-only memory, read-only memory, magnetic memory, flash memory, magnetic disk or optical disk. The storage medium can be any available medium that can be accessed by a general or special purpose computer.

[0060] Embodiment 4:

[0061] An electronic device, comprising:

[0062] one or more processors; memory; and

[0063] One or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the programs include a method for executing any one of the above-mentioned electronic parking brake system activation methods, specifically including:

[0064] Determine whether the brake fluid complete leakage state is true;

[0065] In the state that the brake fluid is completely leaked, determining whether the electronic parking brake system functions normally;

[0066] When the brake fluid is completely leaked and the electronic parking brake system functions normally, determining whether the brake pedal signal is set;

[0067] When the brake fluid complete leakage state is true, the electronic parking brake system functions normally and the brake pedal signal is set, a rear wheel anti-lock function start request is sent and the electronic parking brake system is requested to start braking.

[0068] The memory is used to store computer programs. The memory may include high-speed random access memory, and may also include non-volatile storage, such as at least one disk memory, and may also be a USB flash drive, a mobile hard disk, a read-only memory, a magnetic disk or an optical disk.

[0069] The processor is used to execute the computer program stored in the memory to implement the adjustment method in the above embodiment. The processor can be a central processing unit, or other general-purpose processors, digital signal processors, application-specific integrated circuits, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the invention can be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.

[0070] Optionally, the memory can be independent or integrated with the processor.

[0071] When the memory is a device independent of the processor, the electronic device may further include a bus. The bus is used to connect the memory and the processor. The bus may be an industrial standard architecture bus, a peripheral device interconnection bus, or an extended industrial standard architecture bus. The bus may be divided into an address bus, a data bus, a control bus, and the like.

[0072] It should be noted that, through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0073] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for activating an electronic parking brake system, characterized in that: include: Determine whether the brake fluid complete leakage state is true; In the state that the brake fluid is completely leaked, determining whether the electronic parking brake system functions normally; When the brake fluid is completely leaked and the electronic parking brake system functions normally, determining whether the brake pedal signal is set; When the brake fluid complete leakage state is true, the electronic parking brake system functions normally and the brake pedal signal is set, a rear wheel anti-lock function start request is sent and the electronic parking brake system is requested to start braking.

2. The method for activating an electronic parking brake system according to claim 1, characterized in that: When the brake fluid complete leakage state is true, the electronic parking brake system functions normally and the brake pedal signal is set, a double flash start request is sent to actively activate the double flash.

3. The method for activating an electronic parking brake system according to claim 1, characterized in that: When the brake fluid is completely leaked and the electronic parking brake system is not functioning normally, When the brake fluid complete leakage state is true, the electronic parking brake system functions normally, and the brake pedal signal is not in the set state, the electronic parking brake system is not activated.

4. The method for activating an electronic parking brake system according to claim 1, characterized in that: Methods for determining whether the brake fluid complete leakage state is true include: Determine whether the oil tank liquid level is below the lowest scale line, and whether the liquid level sensor reports a low liquid level fault; If yes, then determine whether the brake pedal travel is greater than a first preset threshold and whether the brake master cylinder pressure is less than a second preset threshold; If so, determine whether the accumulated time meets the preset time; If so, the brake fluid leakage state is true.

5. The method for activating an electronic parking brake system according to claim 4, characterized in that: When judging whether the oil tank liquid level is lower than the lowest scale line and whether the liquid level sensor reports a low liquid level fault, if not, the brake fluid complete leakage state is false.

6. The method for activating an electronic parking brake system according to claim 4, characterized in that: When judging whether the brake pedal stroke is greater than the first preset threshold and whether the brake master cylinder pressure is less than the second preset threshold, if not, the brake fluid complete leakage state is false.

7. The method for activating an electronic parking brake system according to claim 4, characterized in that: When determining whether the accumulated time satisfies the preset time, if not, the brake fluid complete leakage state is false.

8. An electronic parking brake system activation system, characterized in that: It is used to execute the electronic parking brake system activation method described in any one of claims 1-7.

9. A computer-readable storage medium, characterized in that: The computer program for running the electronic parking brake system activation method is stored therein, wherein the computer program enables a computer to execute the electronic parking brake system activation method according to any one of claims 1 to 7.

10. An electronic device, characterized in that: include: one or more processors; Memory; as well as One or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, the programs including instructions for executing the electronic parking brake system activation method according to any one of claims 1-7.

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