CN116001757A

CN116001757A - Logic control method, system, equipment and storage medium of electronic parking brake system

Info

Publication number: CN116001757A
Application number: CN202211555369.XA
Authority: CN
Inventors: 赵洪田; 何晰浩
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2022-12-06
Filing date: 2022-12-06
Publication date: 2023-04-25

Abstract

The invention discloses a logic control method, a logic control system, logic control equipment and a logic control storage medium of an electronic parking brake system, belonging to the technical field of automobile control, and comprising the following steps: and acquiring a vehicle state, judging whether the condition of starting the retraction of the EPB piston is met according to the vehicle state, continuously pressing the switch of the electronic parking brake system three times according to a certain time interval if the condition of starting is met, and retracting the brake caliper piston of the electronic parking brake system to the initial position by utilizing simple logic judgment of the EPB so as to improve the maintenance efficiency of the EPB brake caliper. Compared with the prior art, the invention uses simple logic judgment to replace the original complex operation process, reduces the working hours of maintaining and repairing the EPB brake caliper, improves the working efficiency and reduces the maintenance cost.

Description

Logic control method, system, equipment and storage medium of electronic parking brake system

Technical Field

The invention belongs to the technical field of automobile control, and particularly relates to a logic control method, a logic control system, logic control equipment and a logic control storage medium of an electronic parking brake system.

Background

With more and more application of brake caliper assemblies (hereinafter referred to as EPB brake calipers) with electronic parking functions, the population of users is wider and wider, and the maintenance convenience of the EPB brake calipers directly affects the after-market cost of the whole automobile factory and the user experience.

The EPB brake caliper is integrated with an electronic parking function, when in service braking, under the action of pressure, brake fluid is filled in the piston to push the piston to press the friction plate, and when in parking braking, the transmission mechanism pushes the push rod, and the push rod pushes the piston to press the friction plate. With the continuous wear of the friction plate, the piston is supported by the push rod, and the position of the piston is continuously outwards.

The conventional operation of replacing friction plates is as follows: and (3) disassembling the guide pin at one side of the brake caliper, rotating the caliper body by 90 degrees, taking down the friction plate, installing a new friction plate, rotating the caliper body back by 90 degrees, and installing the guide pin. Because the thickness of the new friction plate is greater than the thickness of the old friction plate, the caliper cannot be assembled in place if the piston cannot be retracted to the original position.

There are two types of conventional retraction operations of the piston:

the first method is to use special tools, the limiting device of the tools is fixed on the head of the piston, and then the tools are rotated reversely and forcefully along the working direction of the piston until the piston is retracted to the initial position;

the second method is to use a piston reversing device to take down the plug-in wire harness of the EPB brake caliper, and to install the plug-in wire harness on the piston reversing device, wherein the other end of the piston reversing device is connected with the vehicle-mounted storage battery in a reverse way, and when the switch is operated, the EPB motor reversely rotates to retract the piston to the initial position. Then the plugging wire harness is arranged on the EPB brake caliper;

the two modes have complex operation processes, and meanwhile, the EPB has higher maintenance cost (working hours and the like) and lower working efficiency.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a logic control method, a system, equipment and a storage medium of an electronic parking brake system, and the logic control method can be used for returning a piston of a brake caliper to an initial position, replaces the original complex operation process by using simple logic judgment, reduces the working hours of maintaining and maintaining the EPB brake caliper, improves the working efficiency and reduces the maintenance cost.

The invention is realized by the following technical scheme:

in a first aspect, the present invention provides a logic control method of an electronic parking brake system, including:

and acquiring the vehicle state, judging whether the condition for starting the retraction of the EPB piston is met or not according to the vehicle state, if the condition is met, continuously pressing the switch of the electronic parking brake system three times according to a certain time interval, and retracting the brake caliper piston of the electronic parking brake system to the initial position so as to improve the maintenance efficiency of the EPB brake caliper.

Further, the vehicle state satisfies the following two conditions at the same time:

A. the vehicle is flameout but not powered down;

B. the vehicle speed is 0.

Further, the time for each pressing of the switch does not exceed 1s, and the duration for the third pressing of the switch is 10s.

Further, when the switch is pressed down, the vehicle control unit detects a release signal of the electronic parking brake module, and outputs reverse current to a motor of the electronic parking brake module, so that the vehicle parking release is realized.

In a second aspect, the invention also provides a logic control system of the electronic parking brake system, which comprises an electronic parking brake module 1, a vehicle control unit 2 and a switch 3; the electronic parking brake module 1 is in communication connection with the vehicle control unit 2, and the switch 3 is connected with the electronic parking brake module 1; the switch 3 outputs a parking control signal to the electronic parking brake module 1, and the electronic parking brake module 1 outputs a control signal to the vehicle control unit 2.

Further, the electronic parking brake module 1 is connected with the vehicle control unit 2 through a CAN bus.

Further, the switch 3 is connected with the electronic parking brake module 1 through an electronic wire harness.

Further, the switch 3 is pulled up, the vehicle control unit 2 detects a clamping signal of the electronic parking brake module 1, and outputs current to a motor of the electronic parking brake module 1 to realize vehicle parking clamping; when the switch 3 is pressed, the vehicle control unit 2 detects a release signal of the electronic parking brake module 1, and outputs reverse current to a motor of the electronic parking brake module 1, so that the vehicle parking release is realized.

In a third aspect, the present invention further provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the logic control method according to any one of the embodiments of the present invention when the program is executed by the processor.

In a fourth aspect, the present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a logic control method according to any of the embodiments of the present invention.

Compared with the prior art, the invention has the following advantages:

compared with the prior art, the logic control method, the system, the equipment and the storage medium for the electronic parking brake system can realize the retraction of the EPB piston by operating the EPB switch, replace the original complex operation process by using simple logic judgment, reduce the working hours of maintaining and repairing the EPB brake caliper, improve the working efficiency and reduce the maintenance cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.

FIG. 1 is a flow chart of a logic control method of an electronic parking brake system according to the present invention;

FIG. 2 is a system block diagram of a logic control system of an electronic parking brake system of the present invention;

fig. 3 is a schematic structural diagram of an electronic device in embodiment 3 of the present invention;

in the figure: an electronic parking brake module 1, a vehicle control unit 2 and a switch 3.

Detailed Description

For a clear and complete description of the technical scheme and the specific working process thereof, the following specific embodiments of the invention are provided with reference to the accompanying drawings in the specification:

in the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Example 1

As shown in fig. 1, a flow chart of a logic control method of an electronic parking brake system according to the present embodiment is shown, where the logic control method includes:

In the present embodiment, the vehicle state satisfies the following two conditions at the same time:

C. the vehicle is flameout but not powered down;

D. the vehicle speed is 0.

The time for each pressing of the switch does not exceed 1s, and the duration for the third pressing of the switch is 10s.

The time for the driver to operate the switch is usually more than 1.5s (approximately equal to the working time of the EPB motor), and the clamping and releasing of the parking of the vehicle can be realized by the single operation of the switch by the driver, so that the meaning of no actual operation for pulling/pressing the switch twice is realized. Therefore, the switch outputs instructions to the ECU by adopting two-short and one-long homodromous operation, so that misoperation of a driver can be prevented, and EPB is ensured to enter the piston withdrawal operation.

When the switch is pressed, the vehicle control unit detects a release signal of the electronic parking brake module, and outputs reverse current to a motor of the electronic parking brake module, so that the vehicle parking release is realized.

Example 2

As shown in fig. 2, a system block diagram of a logic control system of an electronic parking brake system according to the present embodiment is shown, where the logic control system includes an electronic parking brake module 1, a vehicle control unit 2, and a switch 3; the electronic parking brake module 1 is in communication connection with the vehicle control unit 2, and the switch 3 is connected with the electronic parking brake module 1; the switch 3 outputs a parking control signal to the electronic parking brake module 1, the electronic parking brake module 1 outputs a control signal to the vehicle control unit 2,

in this embodiment, the electronic parking brake module 1 is connected to the vehicle control unit 2 via a CAN bus.

In this embodiment, the switch 3 is connected to the electronic parking brake module 1 through an electronic harness.

In the embodiment, the switch 3 is pulled up, the vehicle control unit 2 detects the clamping signal of the electronic parking brake module 1, and outputs current to the motor of the electronic parking brake module 1 to realize the parking clamping of the vehicle; when the switch 3 is pressed, the vehicle control unit 2 detects a release signal of the electronic parking brake module 1, and outputs reverse current to a motor of the electronic parking brake module 1, so that the vehicle parking release is realized.

Example 3

Fig. 3 is a schematic structural diagram of a computer device in embodiment 3 of the present invention. FIG. 3 illustrates a block diagram of an exemplary computer device 12 suitable for use in implementing embodiments of the present invention. The computer device 12 shown in fig. 3 is merely an example and should not be construed as limiting the functionality and scope of use of embodiments of the present invention.

As shown in FIG. 3, computer device 12 is in the form of a general purpose computing device. Components of computer device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, a bus 18 that connects the various system components, including the system memory 28 and the processing units 16.

Bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor, and a local bus using any of a variety of bus architectures. By way of example, and not limitation, such architectures include Industry Standard Architecture (ISA) bus, micro channel architecture (MAC) bus, enhanced ISA bus, video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect (PCI) bus.

Computer device 12 typically includes a variety of computer system readable media. Such media can be any available media that is accessible by computer device 12 and includes both volatile and nonvolatile media, removable and non-removable media.

The system memory 28 may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM) 30 and/or cache memory 32. The computer device 12 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 34 may be used to read from or write to non-removable, nonvolatile magnetic media (not shown in FIG. 3, commonly referred to as a "hard disk drive"). Although not shown in fig. 3, a magnetic disk drive for reading from and writing to a removable non-volatile magnetic disk (e.g., a "floppy disk"), and an optical disk drive for reading from or writing to a removable non-volatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In such cases, each drive may be coupled to bus 18 through one or more data medium interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to carry out the functions of embodiments of the invention.

A program/utility 40 having a set (at least one) of program modules 42 may be stored in, for example, memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment. Program modules 42 generally perform the functions and/or methods of the embodiments described herein.

The computer device 12 may also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), one or more devices that enable a user to interact with the computer device 12, and/or any devices (e.g., network card, modem, etc.) that enable the computer device 12 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 22. In addition, in the computer device 12 of the present embodiment, the display 24 is not present as a separate body but is embedded in the mirror surface, and the display surface of the display 24 and the mirror surface are visually integrated when the display surface of the display 24 is not displayed. Moreover, computer device 12 may also communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN) and/or a public network, such as the Internet, through network adapter 20. As shown, network adapter 20 communicates with other modules of computer device 12 via bus 18. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with computer device 12, including, but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.

The processing unit 16 executes various functional applications and data processing by running programs stored in the system memory 28, for example, to implement a logic control method of an electronic parking brake system provided in an embodiment of the present invention.

Example 4

Embodiment 4 of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a logic control method for an electronic parking brake system as provided in all the inventive embodiments of the present application.

Any combination of one or more computer readable media may be employed. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Computer program code for carrying out operations of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.

In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.

Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.

Claims

1. A logic control method of an electronic parking brake system, comprising:

2. A logic control method of an electronic parking brake system according to claim 1, wherein the vehicle state satisfies the following two conditions simultaneously:

A. the vehicle is flameout but not powered down;

B. the vehicle speed is 0.

3. A logic control method of an electronic parking brake system according to claim 1, wherein the time for pressing the switch each time is not more than 1s, and the duration for pressing the switch third time is 10s.

4. The logic control method of an electronic parking brake system according to claim 1, wherein when the switch is pressed, the vehicle control unit detects a release signal of the electronic parking brake module, outputs a reverse current to a motor of the electronic parking brake module, and realizes parking release of the vehicle.

5. The logic control system of the electronic parking brake system is characterized by comprising an electronic parking brake module (1), a vehicle control unit (2) and a switch (3); the electronic parking brake module (1) is in communication connection with the vehicle control unit (2), and the switch (3) is connected with the electronic parking brake module (1); the switch (3) outputs a parking control signal to the electronic parking brake module (1), and the electronic parking brake module (1) outputs a control signal to the vehicle control unit (2).

6. A logic control system of an electronic parking brake system according to claim 5, characterized in that the electronic parking brake module (1) is connected to the vehicle control unit (2) via a CAN bus.

7. A logic control system of an electronic parking brake system according to claim 5, characterized in that the switch (3) is connected to the electronic parking brake module (1) by means of an electronic wire harness.

8. The logic control system of an electronic parking brake system according to claim 5, wherein the pull-up switch (3) is used for enabling the vehicle control unit (2) to detect a clamping signal of the electronic parking brake module (1) and output current to a motor of the electronic parking brake module (1) so as to realize parking clamping of the vehicle; and when the switch (3) is pressed, the vehicle control unit (2) detects a release signal of the electronic parking brake module (1) and outputs reverse current to a motor of the electronic parking brake module (1) so as to realize vehicle parking release.

9. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the logic control method of any one of claims 1-4 when the program is executed.

10. A computer readable storage medium having stored thereon a computer program which when executed by a processor implements the logic control method according to any of claims 1-4.