Novel rear wheel active steering device and control method thereof

Abstract

The invention discloses a novel rear wheel active steering device. The device comprises a rear axle sub-frame, a motion conversion mechanism which is arranged on the upper portion of the cross beam ofthe rear axle sub-frame, two steering cross pulling rods of which the ends are respectively connected with two ends of the motion conversion mechanism and two wheel steering knuckle arms of which theends are respectively connected with the other ends of the steering cross pulling rod and the other ends are respectively connected with two rear wheels; the motion conversion mechanism includes a motion conversion mechanism housing with a first accommodating cavity, a crank, an eccentric wheel, in which a through hole is axially formed in an eccentric point, a crank shaft with one end fixedly connected with the through hole and a sliding block which is slidably disposed in a first accommodating cavity and has a second accommodating cavity. The invention also provides a control method for thenovel rear wheel active steering device, and the method can precisely control the steering angle required for rear wheels of an automobile according to the specific automobile speed, the yaw rate andthe front wheel rotation angle when the automobile turns.

Description

technical field [0001] The invention relates to the field of automobile steering safety, in particular to a novel rear wheel active steering device and a control method thereof. Background technique [0002] Since the birth of automobiles, its main steering mode has always been the front wheel steering. Today, on the one hand, the high speed of automobiles has higher and higher requirements for driving safety and stability; on the other hand, the narrow space of urban roads also requires higher and higher steering flexibility for automobiles, and the traditional front-wheel steering has gradually been unable to meet the requirements. What people want from cars. In a traditional front-wheel steering vehicle, the driver manipulates the steering wheel to control the front wheels through the steering trapezoidal mechanism to change the direction, and the rear wheels are fixed in direction and do not turn. Although this steering method is assisted by various power steering meth...

AI Technical Summary

Problems solved by technology

Although this steering method is assisted by various power steering methods, it still has the characteristics of slow and inflexible steering operation on narrow roads with large curvature, long steering time, frequent movement of the steering wheel, large turning radius, and heavy operating burden for the driver. Disadvantages such as heavy burden on the braking system, loss of power, and frequent driver operations when driving at high speeds

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