A hydraulic steering system with independent control of the front wheels of automobiles with redundant functions

Abstract

The invention provides an automotive front wheel independent-control and hydraulic-steering system having a redundancy function. The system is composed of a steering wheel module (21), a hydraulic transmission system (18), hydraulic steering execution modules (15), an electronic control module (13), a steering wheel (1), a steering shaft (2), a gear (19), a rack (3), pistons (20), hydraulic oil cylinders (4), oil pipes (6), a flow control valve (17), electric three-way valves (7), executing oil cylinders (8), magnetic control devices (9), compensation oil tanks (10), switch type control valves (14), steering cross pull rods (16), an electronic control unit (12), a turning angle sensor (22), a torque sensor (5) and electric control wiring harnesses (11). The system makes full use of the advantage of the variable hydraulic transmission direction and achieves independent steering and accurate control of front wheels. When the control system breaks down, turning wheels can be directly controlled by steering wheel power through hydraulic path connection, and the system has a fault-tolerant function.

Description

technical field [0001] The invention belongs to the technical field of automobile steering. Specifically relates to an automobile front wheel independent control hydraulic steering system with redundant functions. Specifically, it can be applied but not only to large commercial vehicles such as SUVs or heavy vehicles. Background technique [0002] The steer-by-wire system has the advantages of fast response, good comfort, precise control, and less space in the car. [0003] Fault-tolerant control technology and road-sensing simulation technology are two key technologies of the current steer-by-wire system. For fault-tolerant control, the existing steer-by-wire systems generally adopt hardware and software methods to realize redundant functions, that is, backup of important components and components that are prone to failure, and fault tolerance through software control. However, although a backup steering system can realize redundant functions, its hardware layout is comp...

AI Technical Summary

Problems solved by technology

However, although a backup steering system can achieve redundant functions, its hardware layout is complicated, the cost is high, and the hardware utilization rate is low.

For road feel simulation, the existing steer-by-wire systems mostly use motors to simulate road feel, but the power of the steering wheel return torque motor is about 50-80W, and the power load is heavy

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