Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Four-wheel driving electric vehicle pavement adhesion factor identifying method

A technology of road adhesion coefficient and adhesion coefficient, which is used in automobile tire testing, electrical digital data processing, special data processing applications, etc., can solve problems such as difficult vehicle speed, and achieve the effect of improving driving stability and good control effect

Inactive Publication Date: 2007-06-06
SHANGHAI FUEL CELL VEHICLE POWERTRAIN +1
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, four-wheel drive vehicles do not have non-driving wheels, and it is difficult to obtain accurate vehicle speed directly, which makes it difficult for the traditional control method based on slip ratio control to be effectively applied to four-wheel drive electric vehicles.

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
  • Four-wheel driving electric vehicle pavement adhesion factor identifying method
  • Four-wheel driving electric vehicle pavement adhesion factor identifying method
  • Four-wheel driving electric vehicle pavement adhesion factor identifying method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] As shown in Figure 1, this estimation method calculates the utilization adhesion coefficient of each wheel based on the wheel speed measured by the wheel speed sensor, the actual output torque of the motor (which can be obtained by the motor controller according to the magnitude of the motor current) and the vertical load of the wheel. . Then judge whether the adhesion coefficient is close to the peak adhesion coefficient of the road surface according to the motion information of the current wheel. If it is close to the peak adhesion coefficient, the adhesion coefficient is considered to be the peak adhesion coefficient of the road surface; if it is not close to the peak adhesion coefficient, it is considered to be the peak adhesion coefficient of the road surface The coefficient is a high adhesion coefficient.

[0022] Specific steps are as fol...

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

This invention disclosed an identification method for road surface attachment coefficient by car. The procedure is as follows: calculate the attachment coefficient of the wheel by wheel speed, output torque and vertical load; estimate whether the wheel attachment coefficient close to the road surface attachment coefficient. If yes, deem the wheel attachment coefficient as the road surface attachment coefficient; if no, estimate again. Stability control device could work efficiently by using this invention.

Description

technical field [0001] The invention relates to a road surface identification method for electric vehicles, more specifically, it relates to a method for estimating road surface adhesion coefficient which is mainly applied to four-wheel independently driven electric vehicles. Background technique [0002] With the increase of car ownership, issues such as energy and environmental protection have gradually become the main obstacles to the development of the automotive industry. Over the past two decades, the governments of western industrialized countries have regarded the research and development of electric vehicles as an effective means to solve environmental and energy problems, and have given them strong economic support. The research and development of new energy vehicles such as fuel cell vehicles and electric vehicles will be further accelerated. [0003] The four-wheel wheel drive electric vehicle has unique advantages in energy saving and en...

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): G01N19/04G01M17/02G06F17/00
Inventor 万钢余卓平左建令张立军熊璐
Owner SHANGHAI FUEL CELL VEHICLE POWERTRAIN
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com