Two-position three-way inverse proportion decompression electromagnetic valve for AT (Automatic Transmission)

Abstract

The invention relates to a two-position three-way inverse proportion decompression electromagnetic valve for an AT (Automatic Transmission). The two-position three-way inverse proportion decompression electromagnetic valve is mainly formed by a main valve and a proportion electromagnet, wherein the main valve is formed by a valve body, a valve core which is positioned at the inner part of the valve body, a valve seat which is sleeved on the valve body and an inner valve core which is positioned at the inner part of the valve core and close to one side of the valve seat, and the proportion electromagnet is formed by a sliding bearing, a bearing seat, a pole shoe, an armature, a top rod, a stroke gasket, a stop iron, a spring seat, a regulating spring, a baffle plate, a regulating screw, a baffle plate cushion, a coil and a yoke iron. According to the two-position three-way inverse proportion decompression electromagnetic valve disclosed by the invention, the problems such as lower response speed, larger pressure fluctuation, short service life, large leakage rate and high manufacturing cost of an existing inverse proportion decompression electromagnetic valve for the AT are solved, and the two-position three-way inverse proportion decompression electromagnetic valve disclosed by the invention has the advantages of high response speed, small pressure fluctuation, long service life , small leakage rate, lower manufacturing cost and the like.

Description

technical field [0001] The patent of the present invention relates to an inverse proportional decompression solenoid valve, especially a two-position three-way inverse proportional decompression solenoid valve used for precise pressure control of an AT (hydraulic torque converter) hydraulic system. Background technique [0002] The inverse proportional pressure reducing valve is the core component of the automatic transmission hydraulic system, which is used for precise pressure control of the automatic transmission oil pressure. At present, the main 6-speed AT in the world is produced by Japan Aisin Company, and the inverse proportional pressure reducing valve used is manufactured by Japan Aisin Company. [0003] The invention patent with the application number "CN200410075145.4" is a representative structure, which is a thrust type proportional electromagnet assembly and a single valve core. The electromagnetic output force set by the thrust type proportional electromagne...

AI Technical Summary

Problems solved by technology

[0012] In order to solve the problems of slow response speed, large pressure fluctuation, short service life, large leakage, and high manufacturing cost of the existing inverse proportional pressure reducing valve for AT, the purpose of the patent of this invention is to provide a 6-speed AT and more gears AT hydraulic control system has fast response speed, small pressure fluctuation, long service life, small leakage, and low manufacturing cost. Two-position three-way inverse proportional pressure reducing solenoid valve

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