Title:
APPARATUS AND METHOD FOR CONTROLLING BRAKING OF ELECTRIC AUTOMOBILE
Document Type and Number:
WIPO Patent Application WO/2018/227885
Kind Code:
A1
Abstract:
An apparatus and method for controlling braking of an electric automobile, which compensate for characteristics of a transmission system (1) by means of adjusting a regenerative braking force of an electric motor (3) and a hydraulic braking force of a hydraulic control system (2). The apparatus comprises an electric motor torque sensor (5), an electric motor rotating speed sensor (6), a wheel rotating speed sensor (7) and a vehicle-mounted braking control system (8), wherein the vehicle-mounted braking control system (8) comprises a half shaft torque determination module (81), a backlash state determination module (82), a backlash compensation control module (83), an elasticity compensation control module (84) and a control time detection module (85). A backlash state is determined by means of the backlash state determination module (82), and according to a backlash state at a gear engagement position in a transmission system, backlash compensation control or elasticity compensation control is carried out on the transmission system (1) by means of the backlash compensation control module (83) or the elasticity compensation control module (84), so that the risk that a regenerative braking torque impact and vibration at a corresponding wheel caused by backlash and elasticity of the transmission system (1) can be reduced. The present invention can be widely applied in the technical field of electric vehicles.
Inventors:
ZHANG JUNZHI (CN)
ZHANG ZHONGSHI (CN)
MA RUIHAI (CN)
ZHANG ZHONGSHI (CN)
MA RUIHAI (CN)
Application Number:
PCT/CN2017/112531
Publication Date:
December 20, 2018
Filing Date:
November 23, 2017
Export Citation:
Assignee:
UNIV TSINGHUA (CN)
International Classes:
B60L7/26; F16H57/12
Foreign References:
| CN107225979A | 2017-10-03 | |||
| CN106627168A | 2017-05-10 | |||
| CN104443009A | 2015-03-25 | |||
| CN101407179A | 2009-04-15 | |||
| JP2010070041A | 2010-04-02 | |||
| KR101724913B1 | 2017-04-10 |
Other References:
ZHANG, ZHONGSHI ET AL.: "The Effect of Half-Shaft Properties on Regenerative and Hydraulic Blended Braking Control for Electric Vehicles", TRANSACTIONS OF CHINA ELECTROTECHNICAL SOCIETY, vol. 32, no. 11, 10 June 2017 (2017-06-10), pages 189 - 197, ISSN: 1000-6753
Attorney, Agent or Firm:
JEEKAI & PARTNERS (CN)
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