Multi-axle vehicle and steering control system and steering control method of vehicle
A steering control and vehicle technology, applied in the direction of fluid steering mechanism, etc., can solve the problem of long steering delay time, and achieve the effect of reducing delay and eliminating instability
Active Publication Date: 2015-04-01
ZOOMLION HEAVY IND CO LTD
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Problems solved by technology
[0010] The present invention aims to provide a multi-axle vehicle and its steering control system and steering control method to solve the problem of long steering delay time caused by the load feedback technology of the electro-hydraulic steering system in the prior art
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[0029] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0030] The multi-axle vehicle in the embodiment of the present invention includes a first axle, a plurality of rear steering axles, a steering control system and an engine 102, the first axle is controlled by a steering machine, and the steering is connected by a rod system, and the steering angle signal of the first axle is transmitted to Controller 103. The controller 103 calculates the target steering angle of each steering axle and compares it with the obtained real-time steering angle signal of each axle. The controller 103 sends an instruction to control the steering valve, thereby realizing driving steering. The engine 102 serves as a power source for the steering control system.
[003...
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The invention provides a multi-axle vehicle and a steering control system and a steering control method of the vehicle. The steering control system of the multi-axle vehicle comprises a variable pump, a plurality of steering valve groups and a controller, wherein the variable pump is used for supplying an oil source to the steering control system through a main pressure oil way under drive of an engine; the plurality of steering valve groups are respectively arranged in a hydraulic oil way of each rear steering axle; each steering valve group is used for controlling flow and direction of the hydraulic oil way of the corresponding rear steering axle; the hydraulic oil ways of the plurality of rear steering axles are respectively connected with the main pressure oil way; and the controller is used for acquiring a rotating speed signal of the engine and real-time steering angle signals of the first axle and the plurality of rear steering axles, calculating target steering angles of the plurality of rear steering axles, determining target hydraulic flow of the plurality of steering valve groups, respectively transmitting instruction signals which correspond to the target hydraulic flow to the plurality of steering valve groups, and calculating a control signal of the variable pump according to the rotating speed signal and the instruction signal of the engine. Therefore, the displacement of the variable pump is controlled, and the steering delay is reduced.
Description
technical field [0001] The invention relates to the field of construction machinery, in particular to a multi-axle vehicle, a steering control system and a steering control method thereof. Background technique [0002] Large-scale engineering vehicles are currently developing towards multi-axle and multi-mode steering. The traditional steering mode connected by hydraulic power-assisted linkage has encountered bottlenecks, while electro-hydraulic control steering systems have been more and more widely used. Electrohydraulic steering has a huge advantage in terms of mode switching. [0003] The implementation of the electro-hydraulic steering control system is generally as follows: the first bridge is controlled by the steering machine, and the steering is connected by a rod system, the steering angle signal of the first bridge is transmitted to the controller, and the controller obtains the target steering angle of each steering bridge through calculation, and The obtained r...
Claims
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IPC IPC(8): B62D5/06
Inventor 郭堃李英智刘建华郭纪梅刘伟张松林李雄
Owner ZOOMLION HEAVY IND CO LTD