Intelligent grading method for electronic parking braking force

A technology of electronic parking brake and grading method, applied in the direction of brakes, brake transmission devices, vehicle components, etc., can solve the problems of slow parking brake response, short service life, poor comfort experience, etc. Fast braking response, good comfort experience, and long service life

Active Publication Date: 2021-11-23
JAINGXI ISUZU AUTOMOBILE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, for parking on a small slope with frequent daily use, the parking brake force is much higher than the actual requirement of the vehicle, resulting in

Method used

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  • Intelligent grading method for electronic parking braking force
  • Intelligent grading method for electronic parking braking force
  • Intelligent grading method for electronic parking braking force

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The electronic parking system ECU is integrated in the ESC module, and the software is integrated in accordance with the VDA305-100 specification. Static parking is divided into normal mode and hub mode according to different conditions;

[0058] Working logic in normal mode conforms to figure 1 , judge the current slope through the output value of the longitudinal acceleration sensor inside the vehicle. According to the slope value, select the corresponding path to determine the level of the output parking brake force; the calculation method is as follows:

[0059] The vehicle is on a slope with a slope s, and the sensor outputs a value, then the slope s=tan(arcsin(a / 9.8)). Positive values ​​are uphill and negative values ​​are downhill.

[0060] In the normal mode, the output parking brake force is divided into 3 sections. The specific force value is calculated theoretically while considering the limit situation and safety redundancy preset, and the current charact...

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PUM

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Abstract

The invention discloses an intelligent grading method for electronic parking braking force. Static parking of an electronic parking braking system is divided into a common mode and a hub rotating mode according to different conditions. In the common mode, the current gradient is judged through the output value of a longitudinal acceleration sensor in the vehicle. According to the gradient value, a corresponding path is selected, and the level of the output parking braking force is determined; in the common mode, the output parking braking force is divided into three sections, the specific force value is calculated theoretically, the limit condition and safety redundancy presetting are considered at the same time, and the current characteristic of the corresponding actuator is calibrated. In the hub rotating mode, the working condition of the vehicle is intelligently recognized through a program, and parking braking force meeting the requirements of laws and regulations is output; and after the hub rotating mode is started, the EPB switch is pulled up and not released, the parking braking force is output in two sections, and the time interval Ts is equal to 0.5 s.

Description

technical field [0001] The invention relates to the technical field of electronic parking, in particular to an intelligent classification method for electronic parking braking force. Background technique [0002] The parking braking force of the existing electronic parking system generally only outputs a single maximum parking braking force. That is, the maximum parking braking force is uniformly output in a fixed manner regardless of the operating conditions. In this way, for parking on a small slope with frequent daily use, the parking brake force is much higher than the actual requirement of the vehicle, resulting in problems such as slow response of the parking brake and poor comfort experience. Working under the braking force of the car, the service life is relatively short. Therefore, it is necessary to propose an effective solution to solve the above problems. Contents of the invention [0003] In order to solve the problems existing in the prior art, the object ...

Claims

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Application Information

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IPC IPC(8): B60T8/17B60T13/74
CPCB60T8/17B60T13/741
Inventor 邱文兵邓清华廖程亮游瀚沈迎港
Owner JAINGXI ISUZU AUTOMOBILE CO LTD
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