Vehicle centering control system and vehicle

Abstract

The invention discloses a vehicle centering control system. The vehicle centering control system comprises a pressure oil source (1), a one-way valve (2), a pressure control valve, a steering valve (4), a centering cylinder (5) and an oil tank (6), wherein the pressure control valve is used for controlling the maximum pressure value of oil liquid which is introduced into a rod cavity and a rodless cavity in the centering cylinder (5); the one-way valve (2) and the steering valve (4) are sequentially arranged on an oil inlet oil path of the centering cylinder (5) in the flow direction of a pressure oil source; and the steering valve is used for controlling the rod cavity and the rodless cavity of the centering cylinder to be connected with the pressure oil source under a locking state of the centering cylinder and is connected with the oil tank under a following state of the centering cylinder. Furthermore, the system further comprises a back pressure valve which is arranged on the oil path between the steering valve and the oil tank, and back pressure is formed by the oil liquid in the rod cavity and the rodless cavity of the centering cylinder relative to the oil liquid in a middle cavity at the following state of the centering cylinder. The vehicle centering control system has simple and reliable control logic and can realize the flexible locking of the centering cylinder and obtain the good centering tendency.

Description

technical field [0001] The invention relates to a vehicle steering and centering system, in particular to a vehicle centering control system with flexible locking and centering tendency. Background technique [0002] In the design of vehicle steering and centering systems, for large-tonnage construction machinery vehicles, hydraulic power is usually used to facilitate steering or centering, so that the vehicle can turn or go straight. Therefore, if figure 1 Shown is a hydraulic power assist device in a vehicle steering and centering system disclosed in Chinese patent CN102030037A. A centering cylinder 5 and two centering cylinders 5 and two Steering cylinder 15. Wherein, a power steering cylinder 15 on one side of the vehicle axle 13 and the extension end of the centering cylinder 5 are respectively hinged on the two ends of the connecting rod 16 connected to the steering knuckle arm of the side wheel 14, and the middle part of the connecting rod 16 passes through The hin...

AI Technical Summary

Problems solved by technology

But because there is greater frictional force between the first piston 11 and the second piston 12 and the cylinder body 9, the first piston 11 or the second piston 12 at the end position of the cylinder body 9 cannot follow or immediately follow the piston rod 10 to move

In this way, when the centering cylinder turns into a locked state, a pressure oil source is required to push the first piston 11 or the second piston 12 back to the initial position, so that the response speed is relatively slow and a certain impact is caused due to the large stroke of the piston rod 10 , increasing the volume of the pressure oil source

Images