A control-by-wire chassis multi-mode electro-hydraulic steering system and control method

Abstract

The invention discloses a multi-mode electro-hydraulic steering system and a control method for a control-by-wire chassis. unit, ranging infrared sensor, pressure sensor, infrared camera, electromagnetic clutch, steering tie rod, steering trapezoid and steering wheel. The method includes: inputting the steering wheel angle according to the driving conditions; the information processing unit receives, calculates and transmits signals to the working mode decision-making unit and the steering decision-making unit; the working mode decision-making unit obtains the current working mode through comparison, and inputs the signal to the steering decision-making unit ; Enter the follow-up work mode according to whether an emergency accident occurs, drive the motor to work and complete the steering. The invention can give full play to the advantages of mixing electro-hydraulic and single-motor electric power assist, save labor in the main driver's position, improve the reliability of the co-driver's position, have the advantages of good energy-saving characteristics, high steering control precision, and reduce the incidence of accidents.

Description

technical field [0001] The invention relates to the technical field of automobile steering systems, in particular to a wire-controlled chassis multi-mode electro-hydraulic steering system and a control method. Background technique [0002] In order to make the motion mode of the vehicle more flexible and improve the intelligence of the vehicle, the current research on the control-by-wire chassis has become a hot spot. However, the current drive-by-wire chassis is mainly designed to optimize the traditional single steering wheel vehicle, that is, a single-mode steering system; for vehicles with a multi-mode steering system, there is no instance of the application of the drive-by-wire chassis technology on it. For vehicles that can be equipped with multiple steering wheels and steering systems, such as special engineering vehicles, coach vehicles, and off-road operation vehicles, the wire-controlled chassis can also greatly improve their performance. There has been no public r...

AI Technical Summary

Problems solved by technology

[0004] The existing co-pilot emergency intervention method usually adopts a mechanical structure. For example, Chinese patent application number 201811173388.X discloses that when an emergency occurs, the co-pilot instructor steps on the sub-brake pedal, and the main driving trainee cannot operate the main steering wheel. The practice car dual steering wheel steering control cut-off device

However, this kind of mechanical structure can only rely on the operational response ability of the co-pilot, once a mistake occurs, it will cause an accident; at the same time, vehicles with dual steering wheels on the market usually use dual hydraulic power steering or dual electronically controlled hydraulic power steering , for example, a dual steering wheel electronic control system for an electric forklift disclosed in Chinese Patent Application No. 201821765488.7, a new auxiliary direction is added, and a high-performance potentiometer is used to control the steering signal. Low power consumption, high hydraulic energy consumption, etc., and because the co-pilot position is not always manipulated, it is very likely that it will be touched by mistake and affect the running direction of the vehicle, which will affect the reliability of the vehicle steering

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