Multi-mode electro-hydraulic all-wheel steering system of special vehicle and control method of system

Abstract

The invention discloses a multi-mode electro-hydraulic all-wheel steering system of a special vehicle, wherein the system comprises a front steering axle set, a rear steering axle set and a steering electric control system; the front steering axle set comprises at least one front steering axle, and the front steering axle provides assistance through a front steering pump; the rear steering axle set comprises two sets of mutually independent rear steering axles, each rear steering axle is respectively provided with a rear steering power-assisted oil cylinder and a rear alignment power-assisted oil cylinder, and all the rear steering power-assisted oil cylinders and the rear alignment power-assisted oil cylinders provide power through a rear steering pump via a control valve block; and the steering electric control system comprises a display control device and a steering controller, the display control device is connected with the steering controller and used for switching a steering mode, and the steering controller controls the rear steering axle set to follow the front steering axle set to steer according to the steering mode selected by the display control device. The system can be suitable for heavy multi-axle vehicles, the steering requirements of the vehicles for different working conditions are met, and the trafficability and stability of the vehicles during steering are improved.

Description

technical field [0001] The invention relates to the technical field of heavy-duty vehicle chassis, and more specifically, the invention relates to a multi-mode electro-hydraulic all-wheel steering system and a control method for a special vehicle. Background technique [0002] Due to the characteristics of large load and long wheelbase of heavy-duty multi-axle vehicles, the steering performance of the chassis directly affects the steering passability, handling stability and driving safety of the vehicle. The steering system generally adopts a multi-axle steering system solution. With the development of multi-axle vehicles in my country towards heavy-duty and electrified vehicles, the size of the vehicle is getting larger and larger, and the requirements for steering passability are also getting higher and higher, and the complex off-road driving conditions require that the chassis of special vehicles should have a relatively high High maneuverability and smoothness, therefore...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of poor steering passability and stability of existing multi-axle heavy vehicles under different working conditions, the present invention innovatively provides a multi-mode electro-hydraulic all-wheel steering system and control method for special vehicles, which provide multi-axle heavy vehicles with Steering under different working conditions provides an effective solution, which can be applied to heavy vehicles, meet the steering needs of vehicles for different working conditions, and improve the passability and stability of vehicles when turning

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