Four-wheel steering system for automobile

Abstract

The invention discloses a four-wheel steering system for an automobile. The steering system comprises a traditional steering system and an independent steering system, wherein front wheels adopt the pinion-and-rack traditional steering system, and rear wheels adopt the independent steering system; the rear wheel independent steering system is composed of motors, a reduction mechanism and a transmission mechanism, the motors are rotary motors, and the reduction mechanism is a worm and gear mechanism; the transmission mechanism comprises a vehicle frame, the left rear wheel corresponds to one rotary motor, the right rear wheel corresponds to one rotary motor, and the two rotary motors are independent of each other and control the steering motion of the corresponding wheels. By the adoption of the four-wheel steering mode, the defects of a traditional steering system are overcome, the front wheels and the rear wheels conduct antiphase steering during low-speed turning, and then the turning radius of the automobile is reduced to improve maneuverability; the front wheels and the rear wheels mainly conduct in-phase steering during high-speed turning, the side slip angle of the automobile can be reduced, the steady-state overshoot of the automobile yaw rate can be reduced, and the handling stability of the automobile is further improved.

Description

Technical field: [0001] The invention relates to a four-wheel steering system suitable for automobiles, which is used for the four-wheel steering of automobiles. Background technique: [0002] With the development of economy and the advancement of automobile technology, highway traffic presents a trend of high-speed driving, dense traffic flow and non-professional drivers. Automobile traffic accidents have also brought a great threat to people's lives and properties, and it is directly related to the safety of people's lives and properties. How to improve automobile safety and reduce the number of casualties in traffic accidents has increasingly become a hot issue in the field of automobile research and design. [0003] Steering system, as one of the many key systems of the car, is very important to the driving safety of the car. Although the traditional steering system (mechanical, hydraulic power steering or electric power steering system) has developed quite maturely an...

AI Technical Summary

Problems solved by technology

However, the current integrated rear wheel steering device only relies on the linear stepper motor to drive the steering rod to move laterally. In some occasions that require a large steering torque, such as muddy roads or when large angle steering is required, it often has certain limitations.

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