NORMALLY CLOSED SOLENOID VALVE - TOYOTA MOTOR CO LTD

Title:

NORMALLY CLOSED SOLENOID VALVE

Document Type and Number:

WIPO Patent Application WO/2013/186859

Kind Code:

A1

Abstract:

A normally closed solenoid valve (100) is provided with a housing (10), a valve body (21) assembled thereto, a moveable core (22), a first spring (23), a second spring (24), a coil (25), and a fixed core (26). The valve body (21) is provided such that the valve body (21) can be seated onto and unseated from a valve seat (12c). The moveable core (22) is assembled in an integrated fashion with the valve body (21) within a cylinder part (11b) of the housing (10) so as to be moveable in the axial direction. The first spring (23) biases the valve body (21) and moveable core (22) toward the valve seat (12c). Using the power that is supplied to the coil (25), the coil (25) and fixed core (26) generate an electromagnetic force against the moveable core (22) in resistance to the load of the first spring (23). The second spring (24) applies to the valve body (21) and moveable core (22) a load smaller than that of the first spring (23) in resistance to said load. Furthermore, the normally closed solenoid valve (100) is provided with a load adjustment mechanism capable of adjusting the load of the first spring (23) and a stroke adjustment mechanism capable of adjusting the unseating stroke of the valve body (21) from the valve seat (12c).

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Inventors:

NANAHARA MASAKI (JP)
TANAKA YOSHITO (JP)
SATO KEI (JP)

Application Number:

PCT/JP2012/065037

Publication Date:

December 19, 2013

Filing Date:

June 12, 2012

Export Citation:

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Assignee:

TOYOTA MOTOR CO LTD (JP)
NANAHARA MASAKI (JP)
TANAKA YOSHITO (JP)
SATO KEI (JP)

International Classes:

F16K31/06

Foreign References:

JPS6435273U	1989-03-03
JP2001041340A	2001-02-13
JP2004347076A	2004-12-09

Attorney, Agent or Firm:

PROSPEC PATENT FIRM (JP)
Patent business corporation Pros Peck patent firm (JP)

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