Method for estimating brake pressure of automobile and peak value of road adhesion coefficient

A road surface adhesion coefficient and adhesion coefficient technology, which is applied in calculation, electrical digital data processing, and special data processing applications, etc., to achieve the effects of easy promotion, cost reduction, and improvement of traffic safety

Inactive Publication Date: 2010-09-08
BEIHANG UNIV
View PDF3 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Simultaneously estimating the brake pressure and adhesion coefficient without introducing the brake pressure measurement element, there is no report on this aspect

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for estimating brake pressure of automobile and peak value of road adhesion coefficient
  • Method for estimating brake pressure of automobile and peak value of road adhesion coefficient
  • Method for estimating brake pressure of automobile and peak value of road adhesion coefficient

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] A kind of automobile braking pressure and road surface adhesion coefficient estimation method of the present invention are introduced below in conjunction with accompanying drawing and embodiment:

[0042] Such as figure 1 As shown, a method for estimating the braking pressure of a vehicle and the peak adhesion coefficient of a road surface includes the following steps:

[0043] Step 1: Road surface peak adhesion coefficient and braking pressure classification;

[0044] According to the road conditions that may be encountered when the vehicle is braking and the test results of the vehicle braking test, the value of the peak adhesion coefficient of the road surface is divided into m levels, and the initial pressure value of the wheel cylinder is divided into n levels (m and n are both greater than 1. integer). The ranges of the determined road surface adhesion coefficient values ​​and wheel cylinder initial pressure values ​​must cover the value ranges of various worki...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of automobile brakes, in particular to a method for estimating the brake pressure of an automobile and the peak value of the road adhesion coefficient, more particularly, the invention intends to provide a method for estimating the brake pressure of an automobile and the peak value of the road adhesion coefficient on the basis of the conditions of the wheel speed and pressure control under the condition that no component for measuring the brake pressure is introduced. The method comprises the following steps: grading the peak value of the road adhesion coefficient and the brake pressure; and estimating the peak value of the road adhesion coefficient and the initial brake pressure of a wheel cylinder. By estimating the peak value of the road adhesion coefficient and the initial brake pressure of the wheel cylinder, the invention is capable of estimating the brake pressure of the automobile and the peak value of the road adhesion coefficient under the condition that no component for measuring the brake pressure is introduced, thus improving the breaking efficiency of an ABS (anti-lock braking system) and providing strong support for the fail-safe function. According to the tests, the maximum relative error between the estimated value and the measured value of the pressure of the wheel cylinder of the brake is lower than 10%, thus meeting the requirements for ABS control, reducing the cost and facilitating the popularization of the ABS in the field of braking and being beneficial to the improvement on the traffic safety.

Description

technical field [0001] The invention belongs to the technical field of automobile braking, and in particular relates to an estimation method for automobile braking pressure and road surface peak adhesion coefficient. Background technique [0002] ABS (Anti-lock Braking System) is an auxiliary braking device currently equipped on automobiles. It is an automatic control system used to prevent wheel locking and maximize the use of road adhesion coefficients during braking. device. As people pay more and more attention to personal safety, higher requirements are put forward for the braking performance of the ABS system and its adaptability to road adhesion conditions. ABS should not only have high braking performance on high-adhesion roads with good road adhesion, but also on low-adhesion roads, butt joint roads with sudden changes in adhesion coefficients, open roads with large differences in left and right adhesion coefficients, and curves and roads. It still has high brakin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/28G01N19/02G06F17/50
Inventor 丁能根余贵珍王健张为
Owner BEIHANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap