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US 6,957,663 B2Granted
Solenoid control valve
AssigneeTgk Co., Ltd.
InventorsHisatoshi Hirota, Yuusuke Inoue, Toshiyuki Shiota, Tokumi Tsugawa
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AssigneeTgk Co., Ltd.
InventorsHisatoshi Hirota, Yuusuke Inoue, Toshiyuki Shiota, Tokumi Tsugawa
Estimating the term…
The object of the present invention is to provide a solenoid control valve simple in construction and low in cost, realized by reducing the number of component parts, eliminating screw-joined portions, and minimizing the use of rubber O rings. A valve hole of a pilot valve, a hole of a bearing for supporting one end of a shaft of a solenoid, and a fitting hole in which is fitted one end of a sleeve, are formed along the same axis in a body. This makes it possible to accurately establish the concentricity of movable components of the solenoid when the sleeve is fitted in the fitting hole, and hence, a pilot valve element can be integrally formed with the shaft. Set values for a main valve and the pilot valve are adjusted by adjusting the amounts of insertions of a press-fit member and a bearing by press-fitting. At the same time, a space below a piston and an end of a hole through a core are closed by the press-fit members and the solenoid and the body are joined to each other by caulking a yoke to thereby eliminate screw portions, and minimize rubber sealed portions.
A solenoid control valve of a pilot-operated type for controlling a flow rate of refrigerant such that a differential pressure of a fluid between an inlet and an outlet of a body containing a main valve becomes equal to a differential pressure set based on a value of an electric current caused to flow through a solenoid, comprising:
Dependencies are inferred from the claim text.