Heavy multi-axle vehicle steering system based on hydraulic transformer and control method thereof

Abstract

The invention provides a heavy multi-axle vehicle steering system based on a hydraulic transformer. The vehicle steering system comprises a plurality of steering axles arranged in sequence, wherein a power-assisted steering cylinder for driving a steering axle is arranged in the steering axle; the power-assisted steering cylinder is connected with a servo proportional valve and a hydraulic transformer combination device; the same hydraulic transformer combination device is used for controlling part of steering shafts with relatively small differences of steering angles and steering resistance torques under most working conditions and steering modes, and during use, the control system identifies the expected oil supply pressure of each steering shaft and outputs hydraulic pressure suitable for each steering resistance torque; energy consumption is reduced to the greatest extent while the heavy multi-axle vehicle smoothly completes the steering action; and through series and parallel connection switching loops, a problem that the super-large steering resistance moment is difficult to overcome to complete steering under the extreme working condition is further solved. By means of the process, energy consumption generated by a heavy multi-axle vehicle steering system is comprehensively reduced, and meanwhile the original good steering characteristic of the heavy multi-axle vehicle steering system is guaranteed.

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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