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Torque vector control system and method of hub four-wheel drive purely-electric vehicle

A pure electric vehicle and torque vectoring technology, which is applied in the torque vector control system and control field of wheel hub four-wheel drive pure electric vehicles, can solve the problems of complex structure and low degree of freedom, so as to prevent over-discharge, improve vehicle safety, and improve The effect of vehicle stability

Active Publication Date: 2019-11-19
DONGFENG MOTOR CORP HUBEI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The torque vectoring control of the traditional centralized drive internal combustion engine or electric motor vehicle needs to be realized with the help of torque vectoring distribution differential, its structure is complex and the degree of freedom is not high

Method used

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  • Torque vector control system and method of hub four-wheel drive purely-electric vehicle

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Embodiment Construction

[0014] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0015] Such as figure 1 The torque vector control system of the in-wheel four-wheel drive pure electric vehicle shown, such as figure 1 As shown, it includes a vehicle state monitor 2, a friction coefficient estimator 3, a differential torsion yaw moment decision module 4, a torque control distributor module 6 and a torque coordination control module 7, wherein the vehicle state monitor 2 is used for According to the driver's input steering wheel angle, tire parameter information and vehicle power part status information, vehicle motion information is obtained in real time. Vehicle motion information includes longitudinal speed, lateral speed, and side slip angle of center of mass; tire parameter information includes longitudinal tire force and lateral tire force. Force, the status information of the power part of the vehicle includes wheel spe...

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Abstract

The invention discloses a torque vector control system of a hub four-wheel drive purely-electric vehicle. The torque vector control system comprises a vehicle state monitor, a friction coefficient estimator, a differential torque yawing moment decision making module, a torque control distributor module and a torque coordination control module. The differential torque yawing moment decision makingmodule is used for acquiring vehicle differential torque yawing moment by establishing a kinematics parameter relationship according to the driver input steering wheel rotating angle, vehicle motion information, the road surface adhesion coefficient, lateral tire force and longitudinal tire force. The torque control distributor module is used for acquiring ideal torque distributed values of all wheels according to four-wheel hub motor brake and drive torque requirements, the vehicle motion information, the road surface adhesion coefficient, tire parameter information, the battery SOC value anddifferential torque yawing moment. The control stability of the vehicle can be improved, and the steering sensitivity of the vehicle can be improved.

Description

technical field [0001] The invention relates to the technical field of pure electric vehicle control, in particular to a torque vector control system and control method for a hub four-wheel drive pure electric vehicle. Background technique [0002] In-wheel motor technology and application change the traditional automobile transmission system through subversive innovation. It is quite forward-looking in the new energy automobile industry and has been widely concerned. It is considered to be the mainstream development trend of new energy automobile drive technology in the future. Its industrialization has great prospects for development. Compared with the traditional centralized drive internal combustion engine or electric motor, the hub motor adopts distributed drive, which integrates the driving, transmission and braking devices into the hub, omitting the clutch, transmission, drive shaft, differential, transfer case and other transmission parts. In-wheel motor drives the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/20B60T8/1755B60T8/58
CPCB60L15/20B60L15/2009B60L2220/44B60L2240/12B60L2240/16B60L2240/18B60L2240/24B60L2240/46B60L2240/465B60L2240/48B60L2240/54B60L2250/26B60T8/1755B60T8/17551B60T8/58Y02T10/72
Inventor 张泽阳史建鹏赵春来王秋来王念秦博李洪涛
Owner DONGFENG MOTOR CORP HUBEI
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