Steering system and control method of heavy-duty multi-axle vehicle based on hydraulic transformer

Abstract

The present invention proposes a heavy-duty multi-axle vehicle steering system based on a hydraulic transformer. The vehicle steering system includes a plurality of sequentially arranged steering axles; the steering axle is provided with a steering assist cylinder for driving the steering axle; the steering assist cylinder is connected to the steering axle. The servo proportional valve and the hydraulic transformer combination device are connected; and the same hydraulic transformer combination device controls most of the working conditions and some steering shafts with small differences in steering angle and steering resistance torque under the steering mode. When in use, the control system recognizes the desired The oil supply pressure of the steering shaft is large, and the hydraulic pressure suitable for each steering resistance torque is output, so that the heavy multi-axle vehicle can successfully complete the steering action while minimizing energy consumption; and through the series and parallel switching circuits, the extreme Under working conditions, it is difficult to overcome the problem of over-large steering resistance torque to complete the steering. Through the above process, the present invention comprehensively reduces the energy consumption produced by the steering system of the heavy-duty multi-axle vehicle, and at the same time ensures its original good steering characteristics.

Description

technical field [0001] The invention relates to the technical field of vehicle steering systems, in particular to a hydraulic transformer-based heavy-duty multi-axle vehicle steering system and a control method thereof. Background technique [0002] Heavy-duty multi-axle vehicles are widely used in the field of large-scale infrastructure and material transportation (such as large-tonnage all-terrain cranes, large-scale beam trucks and mining dump trucks and other civilian equipment) and military heavy industry transportation (such as large missile transport vehicles, heavy electronic launch vehicles, etc.) vehicles and tractor vehicles and other military special vehicles). With the development of the economy and the attention of the country, the demand for heavy-duty multi-axle vehicles in military engineering machinery, petrochemical, water conservancy and hydropower industries is increasing. The demand for energy saving has gradually become the focus of close attention in...

AI Technical Summary

Problems solved by technology

In addition, through the design of series and parallel switching circuits, it further solves the problem that it is difficult for heavy multi-axle vehicles to overcome the super large steering resistance torque to complete the steering under extreme working conditions

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