CN114274927A

CN114274927A - Novel EPB control method and system

Info

Publication number: CN114274927A
Application number: CN202111418563.9A
Authority: CN
Inventors: 姚雪平
Original assignee: Hozon New Energy Automobile Co Ltd
Current assignee: Hozon New Energy Automobile Co Ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-04-05

Abstract

The invention relates to a novel EPB control method, which comprises the following steps: when the electronic parking system detects that a brake pedal is pressed down and a traction mode button is pressed down, the vehicle calipers are controlled to be released, and when the vehicle calipers are released, the front axle and the rear axle of the vehicle can be dragged. The method of the invention can automatically release the calipers of the automatic parking system in the traction mode of the vehicle, does not need the owner to manually close the electronic parking, and ensures that the vehicle can freely move in the traction mode. And the condition that the axle is damaged by misoperation in the traction mode is avoided as much as possible.

Description

Novel EPB control method and system

Technical Field

The invention belongs to the technical field of vehicles, and particularly relates to a novel EPB control method and system.

Background

The new energy automobile is increasingly popularized, and the nation also advocates the development of the new energy automobile. But different from the traditional fuel vehicle, due to the special power configuration of the new energy vehicle, it is difficult to distinguish whether each vehicle is driving forwards, driving backwards or driving four ways. When the vehicle breaks down and needs to be towed for emergency stop, if a certain shaft is selected to tow, secondary accidents of the vehicle are easily caused, and therefore the vehicle is equipped with a towing mode function on many new energy vehicles.

Under the condition of starting the traction mode function, the power system of the whole vehicle can be cut off, the related self-locking device can be unlocked, but EPB (electronic parking system) needs to be manually closed to perform parking release at the time, so that the front axle and the rear axle of the whole vehicle can be towed or manually moved, otherwise, the electronic parking system can lock the axle by the calipers. However, manual shutdown is troublesome, and unskilled car owners often forget to manually shut down the electronic parking system when the vehicle is damaged due to a fault.

Disclosure of Invention

Based on the above-mentioned shortcomings and drawbacks of the prior art, it is an object of the present invention to at least solve one or more of the above-mentioned problems of the prior art, in other words, to provide a novel EPB control method and system that meets one or more of the above-mentioned needs.

In order to achieve the purpose, the invention adopts the following technical scheme:

a novel EPB control method comprises the following steps:

when the electronic parking system detects that a brake pedal is pressed down and a traction mode button is pressed down, the vehicle calipers are controlled to be released, and when the vehicle calipers are released, the front axle and the rear axle of the vehicle can be dragged.

Preferably, after the caliper is released, the remaining park mode does not control caliper clamping.

Preferably, the rest parking modes comprise flameout parking and door opening parking.

As a further preferable scheme, after the caliper is released, when the electronic parking system detects that the electronic parking switch is pressed, the caliper is controlled to clamp.

On the other hand, the invention also provides a novel EPB control system, which comprises an electronic parking controller, a traction mode switch, a brake pedal and a caliper motor; the electronic parking controller is used for reading signals of the traction mode switch and the brake pedal, and when the traction mode switch is pressed down and the brake pedal is stepped down, the electronic parking controller controls the motor of the calipers to release, so that the front axle and the rear axle of the vehicle can be pulled.

Preferably, the system further comprises an electronic parking switch, the electronic parking controller is further used for reading a signal of the electronic parking switch, and when the electronic parking switch is pressed, the electronic parking controller controls the motor of the caliper to clamp.

Preferably, the system further comprises a vehicle control unit, and signals of the traction mode switch and the brake pedal are firstly sent to the vehicle control unit and then sent to the electronic parking controller by the vehicle control unit.

Compared with the prior art, the invention has the beneficial effects that:

the novel EPB control method can automatically release the calipers of the automatic parking system in the traction mode, and ensures that the vehicle can move freely in the traction mode.

Drawings

Fig. 1 is a block diagram of a novel EPB control system according to an embodiment of the present invention.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention, the following description will explain the embodiments of the present invention with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.

Example (b):

according to the novel EPB control method, the brake pedal can send a self-state signal to the electronic parking system, and the traction button can also send the self-state signal to the electronic parking system. When the electronic parking system detects that the brake pedal is pressed down and the traction mode button is pressed down, the fact that the vehicle needs to enter the traction mode currently is indicated, and then calipers of the automatic parking system are automatically controlled to release, so that the front shaft and the rear shaft of the vehicle can be automatically pulled without a driver operating the automatic parking button, and vehicle traction is conveniently completed.

In order to improve the safety in the traction process and avoid the damage to an axle caused by the false start of a parking mode, after the calipers are released by the method, the calipers cannot be controlled to clamp except the rest parking modes of the electronic parking outside, such as flameout parking and door opening parking. When the electronic parking system detects that the electronic parking switch is pressed, the electronic parking system can generally indicate that a vehicle owner determines that the traction mode is to be stopped, and therefore the caliper can be controlled to clamp.

The invention also provides a novel EPB control system, which is used for realizing the EPB control method and comprises an electronic parking controller, a traction mode switch, a brake pedal and a caliper motor. Signals of the traction mode switch and the brake pedal can be sent to the electronic parking controller, when the electronic parking controller reads that the brake pedal is stepped on and the traction switch is pressed down, the electronic parking controller sends signals to the caliper motor to enable the caliper motor to release the calipers, so that the front axle and the rear axle of the vehicle are released, and the front axle and the rear axle can be pulled.

In order to realize the improvement of avoiding the false start of the parking mode in the method, when the electronic parking switch is pressed, the pressed signal is sent to the electronic parking controller, then the electronic parking controller controls the motor of the caliper to clamp so as to park the vehicle again, and other parking modes are not accepted.

In order to improve the integration level of vehicle control, the EPB control system further comprises a vehicle control unit, and signals of the traction mode switch and the brake pedal are firstly sent to the vehicle control unit and then sent to the electronic parking controller by the vehicle control unit to carry out corresponding operation.

Based on the system, the working process of the invention is as follows: the brake pedal is stepped on and the traction mode switch is pressed down, the signals are sent to the electronic parking controller, the electronic parking controller receives the two signals at the same time and then controls the caliper of the vehicle to release, so that the front shaft and the rear shaft of the vehicle can be pulled, the caliper is not received except the rest parking mode control caliper outside the electronic parking vehicle, the caliper is controlled to clamp until the electronic parking switch is pressed down again, and the normal state is recovered.

The method and the system can automatically release the calipers of the automatic parking system in the traction mode of the vehicle, do not need an owner to manually close the electronic parking, and ensure that the vehicle can freely move in the traction mode. And the condition that the axle is damaged by misoperation in the traction mode is avoided as much as possible.

It should be noted that the above-mentioned embodiments are merely illustrative of the preferred embodiments and principles of the present invention, and those skilled in the art will appreciate that there are variations in the specific embodiments based on the ideas provided by the present invention, and these variations should be considered as the scope of the present invention.

Claims

1. A novel EPB control method, characterized in that said method comprises:

2. The novel EPB control method according to claim 1, wherein after said caliper is released, said caliper cannot be controlled to be clamped except for the remaining parking mode in which the vehicle is parked outside the electronic vehicle.

3. The novel EPB control method of claim 1, wherein said remaining park modes include key-off park, door-on park.

4. The novel EPB control method according to claim 2, wherein the clamping of said caliper is controlled when an electronic parking system detects that an electronic parking switch is pressed after said caliper is released.

5. A novel EPB control system is characterized by comprising an electronic parking controller, a traction mode switch, a brake pedal and a caliper motor; the electronic parking controller is used for reading signals of the traction mode switch and the brake pedal, and when the traction mode switch is pressed down and the brake pedal is stepped down, the electronic parking controller controls the caliper motor to release, so that the front axle and the rear axle of the vehicle can be pulled.

6. The novel EPB control system according to claim 5, further comprising an electronic parking switch, wherein said electronic parking controller is further configured to read a signal of said electronic parking switch, and when said electronic parking switch is pressed, said electronic parking controller controls said caliper motor to clamp.

7. The EPB control system according to claim 5, wherein said system further comprises a vehicle control unit, and signals of said traction mode switch and said brake pedal are sent to said vehicle control unit first, and then sent to said electronic parking controller by said vehicle control unit.