Bidirectional driving vehicle hydraulic system with multimode steering and automatic centering functions

Abstract

The invention provides a bidirectional driving vehicle hydraulic system with multimode steering and automatic centering functions. Hydraulic oil is controlled to enter different non-rod chambers and rod chambers of two sets of steering cylinders in the front and the rear respectively through front and rear load sensing full-hydraulic steering devices, a load sensing pressure cut-out variable-displacement pump, an electromagnetic valve and other auxiliary hydraulic elements, so as to achieve an auto driving mode and a splayed steering mode in front and rear driving cabs; an emergency steering function is achieved through a multimode steering hydraulic system; the full-automatic locking of a non-steering rear axle is controlled through a three-way flow valve, a pilot-operated type unloading valve, a centering oil cylinder, an energy accumulator, an electromagnetic directional valve and other auxiliary hydraulic elements; energy conservation of the hydraulic system is achieved through load sensing full-hydraulic steering devices and variable-displacement pumps with pressure cut-off and load sensing effects in the front and the rear driving cabs; the electromagnetic directional valve controls the operation of a hydraulic heat radiation motor through a pilot-operated type unloading valve, and the heat radiation of the hydraulic system is achieved.

Description

technical field [0001] The invention relates to the technical field of vehicle control systems, in particular to a bidirectional driving vehicle hydraulic system with multi-mode steering and automatic centering functions. Background technique [0002] A two-way driving vehicle is a vehicle with cabs at both the front and rear ends of the vehicle and can realize various functions such as driving, steering, and braking in the two cabs. The steering function of the existing two-way driving vehicles is generally realized through the hydraulic transmission system. The hydraulic steering has the advantages of convenient layout and easy switching between the front and rear cabs, but the vehicles with the hydraulic steering system generally lack the emergency steering function when the steering pump fails. . [0003] The steering modes of two-way driving vehicles are generally divided into two types: front and rear cab car driving modes and figure-of-eight steering modes. The car ...

AI Technical Summary

Problems solved by technology

[0006] In view of the lack of emergency steering function in the case of failure of the steering pump in the prior art, and the above-mentioned defects and problems that require manual locking during locking, resulting in increased technical difficulty, the purpose of the embodiments of the present invention is to provide a multi-mode steering and automatic steering system. The two-way driving vehicle hydraulic system with centering function is suitable for two-way driving vehicles with long vehicle length, fast driving speed and high road turning requirements. It is convenient, fast and easy to operate. Fully automatic locking, increasing safety while reducing industrial costs

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