A hydraulic valve for vehicle steering control

Abstract

The present invention proposes a hydraulic valve for vehicle steering control, including: a valve body, a first connecting block, a second connecting block, a first valve core, a second valve core, a first positioning valve core, and a second positioning valve core , The first positioning solenoid valve, the second positioning solenoid valve, the first electromagnet, the second electromagnet, the third electromagnet, and the fourth electromagnet. According to the hydraulic valve for vehicle steering control according to the embodiment of the present invention, the manufacturing cost is low, and reliable and safe control of the hydraulic steering mode can be realized.

Description

technical field [0001] The invention relates to a hydraulic valve device, in particular to a hydraulic valve used for vehicle steering control. Background technique [0002] Because hydraulic power steering has the advantages of compact structure, light weight, small size, high sensitivity, good stability, ability to absorb road impact and no need for additional lubrication devices, it is widely used in engineering vehicles. In order to adapt to various operating conditions, the steering system of engineering vehicles needs to switch between three steering modes: two-wheel steering, four-wheel steering and crab steering. Currently, combined solenoid valves are generally used to control steering mode switching. Although the existing solenoid valve group can realize the switching of the steering mode, it has the following disadvantages: [0003] (1) Existing solenoid valve groups generally use a plurality of conventional solenoid valves with valve blocks to connect the hydrau...

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Problems solved by technology

[0003] (1) Existing solenoid valve groups generally use a plurality of conventional solenoid valves with valve blocks to connect the hydraulic oil circuit. The volume of the valve block is large, and the processing of the internal flow channel of the valve block is complicated, resulting in excessive overall cost. high

[0004] (2) The conventional solenoid valves used in the existing solenoid valve groups all adopt the working principle of pushing the valve core to overcome the spring after the electromagnet is energized. The force of the valve core is the electromagnet thrust minus the spring compression force, so the electromagnetic A large part of the thrust of the iron is offset by the spring. In order to ensure that the thrust of the electromagnet on the spool is sufficient, the electromagnet must be designed to be large enough, which also increases the size and cost virtually.

[0005] (3) When the existing solenoid valve group switches the steering mode, it needs to energize the electromagnet for a long time. The electromagnet is energized for a long time and generates heat, especially in summer, the coil heating temperature is very high, which seriously affects the electromagnet. service life, affecting the reliability of steering mode switching control

[0006] (4) The design redundancy of the existing solenoid valve group is low. When an electrical failure occurs, the steering system will be seriously affected, affecting the safety of the steering

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