Vehicle, steering system and steering valve

Abstract

The invention relates to a vehicle, a steering system and a steering valve. The steering system comprises a power-assisted cylinder, a bypass valve and a steering valve for controlling the action of the power-assisted cylinder. The steering valve comprises a valve sleeve and a valve element, the valve sleeve is provided with an oil inlet, two circumferential sides of the oil inlet are provided with power-assisted cylinder oil ports communicating with pressure cavities on the two sides of a piston in the power-assisted cylinder correspondingly, the valve element is provided with an oil inlet groove and an oil return groove, the valve sleeve is provided with bypass valve ports communicating with an oil inlet and an oil outlet of the bypass valve correspondingly, the two bypass valve ports are arranged on the sides, far away from the oil inlet, of the two power-assisted cylinder oil ports, the portion, between the oil inlet groove and the oil return groove, of the valve element is provided with bypass valve grooves corresponding to the bypass valve ports, the bypass valve grooves are provided with a parallel stroke communicating with the power-assisted cylinder oil ports to enable thebypass valve to be connected with the power-assisted cylinder in parallel in the one-way rotation stroke of the valve element, and the bypass valve grooves are also provided with a closed state isolated from inlets in the power-assisted cylinder oil ports. When the vehicle turns at a large angle, large steering assistance can be obtained, and the driving safety of the vehicle is improved.

Description

technical field [0001] The invention relates to a vehicle, a steering system and a steering valve. Background technique [0002] With the improvement of living standards, people put forward higher requirements for the maneuverability and safety of passenger cars, especially for the vehicle power steering system, which requires both the stability of the vehicle's handling at high speeds and the lightness of steering at low speeds. sex. [0003] The Chinese patent application with the publication number CN102336216A and the publication date of 2012.02.01 discloses an atmospheric pressure hydraulic steering valve and a steering system. The steering system includes a steering valve. The steering valve includes a valve sleeve and a valve core. The oil inlet hole and the upper chamber groove and the lower chamber groove respectively used to communicate with the upper chamber and the lower chamber of the booster cylinder, the side wall of the valve core is provided with an oil inl...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a steering system to solve the problem that the bypass valve of the vehicle electronically controlled hydraulic power steering system in the prior art may cause a traffic accident; the purpose of the present invention is also to provide a steering valve ; The object of the invention is also to provide a vehicle

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