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EPBi emergency braking control method and device and automobile

A technology of brake pedal and brake hydraulic pressure

Inactive Publication Date: 2021-10-19
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This function cannot quickly respond to the driver's braking request, and the driver's first reaction in an emergency is to step on the brake pedal and forget about this function

Method used

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  • EPBi emergency braking control method and device and automobile

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Embodiment Construction

[0024] The embodiment of the present invention provides an EPBi emergency braking control method when the hydraulic pressure transmission of the automobile brake fails. The EPBi system automatic control function of the EPBi system is calibrated in advance, and the brake pedal angle displacement signal ω and the master cylinder pressure are established in advance. Corresponding curves of P, vehicle deceleration a and automatic control function of EPBi system. Different vehicle types have different automatic control functions of the EPBi system corresponding to the angular displacement ω of the vertical brake pedal, the pressure P of the master cylinder, and the deceleration a of the vehicle.

[0025] refer to figure 1 Specifically, in order to implement the foregoing method, the following operations need to be performed in the embodiment of the present invention. The EPBi system monitors the vehicle's current brake pedal angular displacement ω, master cylinder pressure P, vehi...

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Abstract

The invention provides an EPBi emergency brake control method and device during automobile brake hydraulic transmission failure and an automobile, and when hydraulic transmission failure is monitored, an EPB system is controlled to be activated to achieve dynamic brake. The EPBi emergency automatic control method comprises the steps that the brake pedal angular displacement, the main cylinder pressure and the whole vehicle deceleration of the automobile are collected; based on the angular displacement of the brake pedal, the pressure of the main cylinder and the deceleration of the whole vehicle, whether brake hydraulic transmission of the automobile fails or not is judged; if so, the automatic control function of the EPBi system is activated based on the current vehicle speed of the automobile and the angular displacement of the brake pedal, and an electronic clamp of the EPBi system is made to conduct clamping braking.

Description

technical field [0001] The invention relates to the control logic of the braking system, specifically a control method for EPBi to identify failure conditions of automobile brake hydraulic transmission (pipeline / master cylinder) to control the EPB for emergency braking. Background technique [0002] The current braking system of passenger cars relies on hydraulic oil to transmit braking force. Failure of hydraulic transmission (master cylinder cannot build pressure, pipeline damage, etc.) is a serious failure mode, which will endanger driving safety. [0003] The EPBi dynamic braking function requires the driver to pull the parking switch for a long time to realize dynamic parking, which has serious lag (generally set the parking switch for more than 5 seconds). This function cannot quickly respond to the driver's braking request, and the driver's first reaction in an emergency is to step on the brake pedal, and this function will be forgotten. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T17/18
CPCB60T17/18
Inventor 吕腾
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD