Drive-by-wire four-wheel independent steering system and control method thereof

Abstract

The invention discloses a drive-by-wire four-wheel independent steering system and a control method thereof. The drive-by-wire four-wheel independent steering system comprises a frame, a suspension, wheels and a sleeve steering motor assembly, wherein the suspension is respectively connected with the wheels and the frame, the suspension comprises a lower swing arm, a steering knuckle, a spring upper support, a spring lower support, a spring and a shock absorber, and the spring is respectively connected with the spring upper support and the spring lower support and is arranged between the spring upper support and the spring lower support; the lower swing arm and the shock absorber are both connected with the steering knuckle, and the steering knuckle is connected with the wheels; the lowerswing arm is further connected with the frame, the spring upper support is connected with the frame through a spherical hinge, the sleeve steering motor assembly is fixedly connected with the spring lower support, and the sleeve steering motor drives the shock absorber to rotate around the axis of the shock absorber to output torque so as to enable the steering knuckle to drive the wheels to deflect to achieve steering. The problem in the prior art that a traditional vehicle steering system is large in occupied space and small in driving capacity is solved.

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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