Solenoid valve

Patent metadata

Field	Value
Publication number	US-2018292013-A1
Application number	US-201515570659-A
Country	US
Kind code	A1
Filing date	Aug 13, 2015
Priority date	Aug 13, 2015
Publication date	Oct 11, 2018
Grant date	—

Abstract

By forming a recessed portion (24) in a side surface of a valve element (18), a fluid in internal space (22) escapes to external space (23) via a gap made between the recessed portion (24) and a seal ring (3) during the operation of a solenoid valve. Therefore, a load in a direction of closing the valve element (18) decreases, it becomes easy to open the valve element (18), and the responsivity is improved.

First claim

1 . A solenoid valve comprising:
a casing having an opening; a valve element configured to perform reciprocating motion along in and out directions from the opening; a communicating hole through which an inside and an outside of the casing communicate, the communicating hole being formed in the valve element; a solenoid part for generating an electromagnetic force causing the valve element to move in one direction of the reciprocating motion; a spring for generating an energizing force causing the valve element to move in the other direction of the reciprocating motion; a seal ring fixed to an inner surface of the casing, for filling a gap between the casing and a side surface of the valve element at least when the valve element is located at either end of a range of the reciprocating motion; and a recessed portion formed in the side surface of the valve element, for providing a gap between the recessed portion and the seal ring when the valve element falls within the range of the reciprocating motion.

2 . The solenoid valve according to claim 1 , wherein the recessed portion is formed in a portion of the side surface of the valve element, the portion being opposite to the seal ring when the valve element is located at a position where the electromagnetic force generated by the solenoid part temporarily becomes weak.

3 . The solenoid valve according to claim 1 , wherein the solenoid valve is used as an air bypass valve that is installed in an air bypass passage connecting an upstream portion and a downstream portion of a compressor of a turbocharger, and that returns turbocharged air in the downstream portion of the compressor to the upstream portion of the compressor.

Assignees

• Mitsubishi Electric Corp

Inventors

• Ito Yoshinori

Classifications

• F16K1/36

  Valve members (for double-seat valves F16K1/44 {; for butterfly valves F16K1/222, F16K1/223}) · CPC title

• F16K31/0655 Primary

  Lift valves · CPC title

• F02B37/16

  by bypassing charging air · CPC title

• F02B37/162

  by bypassing, e.g. partially, intake air from pump inlet to pump outlet · CPC title

• F04D27/009

  by bleeding, by passing or recycling fluid · CPC title