Electric drive pusher type steering system controlled by coupling force and displacement and control method

Abstract

The invention relates to an automobile steering assistant-control system and a control method and in particular relates to an electric drive pusher type steering system controlled by coupling force and displacement and a control method. The moment output end of a driving mechanism, connected with a steering motor, is connected with a worm crankpin steering gear through an output shaft; a steering rocker arm on the worm crankpin steering gear is used for controlling a steering knuckle arm; the steering knuckle arm is connected with a steering trapezium rod; an assistant motor is connected with and drives a speed reducing mechanism; the speed reducing mechanism drives an electric drive pusher; and the assistant motor is controlled by an ECU (Electronic Control Unit). The steering assistant-control system provides appropriate assistance under various driving conditions to reduce disturbance caused by an uneven road surface to the steering system, improves steering characteristics of an automobile, decreases the steering operation force of the automobile traveling at a low speed, enhances the steering stability of the automobile traveling at a high speed to further enhance the driving safety of the automobile and meets the requirements of different using objects by setting different steering hand power characteristics.

Description

technical field [0001] The invention relates to an automobile steering auxiliary control system and a control method, in particular to an electric push rod type steering system and a control method of force and displacement coupling control. The invention belongs to the technical field of automobile parts. Background technique [0002] Existing power steering systems mainly include hydraulic power steering systems, electronically controlled hydraulic power steering systems, electric power steering systems (EPS) and steer-by-wire systems. The hydraulic power steering system has the advantages of labor saving and easy control, and has a good effect on the structure and handling performance of the car. However, the hydraulic power steering system also has problems such as poor economy, large volume, and single power assist characteristics. The electro-hydraulic power steering system solves the contradiction between portability and sensitivity to a certain extent, but the elect...

AI Technical Summary

Problems solved by technology

However, because EPS still retains the original traditional mechanical steering system, its steering system has some unavoidable defects due to the fixed connection between the steering wheel and the steering wheel. For example, the steering characteristics are seriously affected by the driver's driving skills. Vehicle transmission ratio fixed and other issues

In the steer-by-wire system, the driver's steering operation and the steering wheel can communicate through signals and the controller. The driver's steering operation is only to input driving instructions to the vehicle. To determine a reasonable front wheel angle, there are still many problems in terms of safety and reliability. At present, it is not legally allowed to directly equip the steer-by-wire system on the vehicle.

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