A wire-controlled four-wheel independent steering system and its control method

Abstract

The invention discloses a four-wheel independent steering system controlled by wire and a control method thereof, comprising a vehicle frame, a suspension, a wheel and a sleeve steering motor assembly; wherein, the suspension is respectively connected with the wheels and the frame, and the The suspension includes: a lower swing arm, a steering knuckle, a spring upper support, a spring lower support, a spring and a shock absorber, the springs are respectively connected to the spring upper support and the spring lower support, and are arranged between them; Both the lower swing arm and the shock absorber are connected to the steering knuckle, and the steering knuckle is connected to the wheel; the lower swing arm is also connected to the vehicle frame, the spring upper support is connected to the vehicle frame through a ball joint, and the sleeve The steering motor assembly is fixedly connected with the spring lower support, and the sleeve steering motor drives the shock absorber to rotate around its axis to output torque, so that the steering knuckle drives the wheel to deflect to realize steering. The invention solves the problems in the prior art that the traditional vehicle steering system occupies a large space and has a small driving capacity.

Description

technical field [0001] The invention belongs to the field of integration and steering of an electric vehicle chassis by wire, and specifically refers to a wire-controlled four-wheel independent steering system integrated with MacPherson suspension shock absorbers and a control method thereof. Background technique [0002] The traditional vehicle steering system ensures that there is a certain functional relationship between the inner and outer wheel angles during steering through the steering trapezoidal mechanism, which approximately satisfies the Ackermann steering law. However, due to the existence of the steering trapezoid, it will inevitably cause the movement interference of the suspension guide mechanism and the steering rod system when the wheels jump up and down, and it is impossible to realize the steering at a large angle. The four-wheel independent steering by wire technology cancels the traditional trapezoidal steering mechanism, which fundamentally solves this ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the prior art above, the purpose of the present invention is to provide a four-wheel independent steering system by wire and its control method, so as to solve the problems in the prior art that the traditional vehicle steering system occupies a large space and has a small driving capacity

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