Electronic differential system of four-wheel independent driving and independent steering electric automobile
A four-wheel independent drive, electronic differential technology, applied in electric vehicles, drive interaction, control drive, etc., can solve the problems of unsuitable four-wheel drive vehicles, single mode, etc., achieve good steering differential performance, and improve driving stability sexual effect
Active Publication Date: 2021-06-22
JILIN UNIV +1
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Problems solved by technology
The existing electronic differential systems based on four-wheel independent drive electric vehicles have the following problems: 1) electronic differential systems are designed and researched based on front-wheel steering vehicles, and are not suitable for four-wheel drive vehicles; 2) electronic differential systems The speed system control strategy is mostly a single mode, which fails to combine the advantages of the speed-type electronic differential control strategy and the torque-type electronic differential control strategy
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[0146] The present invention will be further explained below in conjunction with the accompanying drawings.
[0147] Such as figure 1 As shown, the whole system includes an information collection module, a steering decision module, an electronic differential control module and an execution module; the information collection module collects the vehicle’s own motion information through the on-board sensor, estimates the road adhesion coefficient through the road surface adhesion coefficient estimator, and estimates The vehicle’s own motion information includes steering wheel angle, current vehicle speed, current longitudinal vehicle speed, side slip angle of the vehicle’s center of mass, yaw rate, lateral acceleration, and the rotational speed of each wheel; the steering decision module receives information collection The module obtains the current vehicle speed, steering wheel angle, side slip angle, yaw rate and lateral acceleration of the electric vehicle, and calculates the ...
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The invention discloses an electronic differential system of a four-wheel independent driving and independent steering electric vehicle. The system comprises an information acquisition module, a steering decision module, an electronic differential control module and an execution module. Under the condition that the steering mode and the driving mode of the vehicle can be switched, a speed type electronic differential control strategy and a torque type electronic differential control strategy are reasonably combined, so that the vehicle can keep good differential performance in various steering modes and driving modes, and the running stability of the vehicle is improved.
Description
technical field [0001] The invention belongs to the field of electric vehicle dynamics control, relates to an electric vehicle drive technology, in particular to an electronic differential system of an electric vehicle with four-wheel independent drive and independent steering. Background technique [0002] With the continuous maturity of vehicle industry technology, vehicles are used in all aspects of human production and life. Vehicle driving requirements and road conditions are becoming more and more complex, which puts forward higher requirements for the design of vehicle structure and control strategy. Therefore, a new type of four-wheel independent steering independent drive vehicle is proposed. Compared with traditional vehicles, it has better maneuverability and flexibility. one of the cutting-edge topics. For the new vehicle system with four-wheel independent steering and independent drive, its innovation and advantages compared with traditional vehicles are mainl...
Claims
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IPC IPC(8): B60L15/20B60L15/28B60L15/32
CPCB60L15/2036B60L15/28B60L15/32B60L2240/12B60L2240/24B60L2240/18B60L2240/64B60L2250/26B60L2220/44Y02T10/72
Inventor 郑宏宇田泽玺郭中阳宗长富宋娟娟王剑波吴竟启束琦
Owner JILIN UNIV