Four-wheel steering mode for four-wheel independent drive electric automobile

Abstract

The invention discloses a novel four-wheel steering mode for a four-wheel independent drive electric automobile. The steering mode combines a traditional front wheel steering system and a rear wheel differential steering system. The differential steering mode of the rear wheels is that the driving force difference is generated by controlling the different driving forces of the driving motors of the left and right wheels, so that the wheels are driven to rotate around the main pins to generate rear wheel steering angles, and the advantage of four-wheel steering is reflected. The four-wheel steering system can greatly improve the operation stability and the low-speed steering maneuverability of the vehicle during high-speed steering. A complex steering mechanism can be canceled by adopting rear wheel steering, the structure is simple, and the space utilization of the vehicle is improved. For the limit working condition, due to the fact that the aligning torque of the wheels is very small, the extremely small driving torque difference can generate the extremely large steering angle. The clutch device is installed at the steering tie rod of the rear wheel, the combination pressing degree can be automatically adjusted to generate friction torque for overcoming excessive driving torque difference, and therefore an expected rear wheel steering angle is obtained.

Description

technical field [0001] The invention belongs to the technical field of automobile steering control, in particular to a four-wheel steering method for four-wheel independently driven electric vehicles. Background technique [0002] The continuous development of modern transportation systems and the increasing popularity of automobiles, on the one hand, have brought convenience to travel and promoted the development of automobile technology; on the other hand, they have also led to frequent traffic accidents, threatening people's lives and property safety. The improvement of automobile active safety performance can effectively reduce the incidence of traffic accidents. Therefore, the active safety performance of automobiles has been paid more and more attention by researchers and major automobile manufacturers. People's requirements for active safety performance are getting higher and higher, and the traditional front-wheel steering can no longer meet the requirements. The f...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: in view of the current situation that the above-mentioned traditional front-wheel steering vehicles can no longer meet the requirements of active safety performance and the feasibility of applying differential steering to four-wheel independent drive electric vehicles, a new The steering method used for four-wheel independent drive electric vehicles, combined with traditional front-wheel and rear-wheel differential steering; its purpose is to improve the vehicle's low-speed steering maneuverability and high-speed operation stability

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