Title:
TWO-STAGE VARIABLE FORCE SOLENOID
Document Type and Number:
WIPO Patent Application WO/2012/118698
Kind Code:
A3
Abstract:
A two-stage, variable force, solenoid control valve (10) for regulating fluid pressure can include a valve body (12) having a pilot fluid passage (14), including a metering land (16), in fluid communication with a flow amplifying fluid passage (18) through a valve control port (20) formed in the valve body (12). A solenoid operated pilot valve member (22), disposed in the pilot fluid passage (14), can have a metering orifice (24) operable in combination with the metering land (16) for selectively connecting the valve control port (20) with a pressurized fluid supply port (26) and a return exhaust port (28) in response to activation of a solenoid (34). A flow amplifying spool valve member (30), in fluid communication with the valve control port (20) of the pilot valve member (22) at one end (30a), can selectively connect a load control port (32) with the pressurized fluid supply port (26) and the return exhaust port (28) in response to pilot valve member (22) operation.
Inventors:
HOLMES GARRETT R (US)
Application Number:
PCT/US2012/026445
Publication Date:
November 01, 2012
Filing Date:
February 24, 2012
Export Citation:
Assignee:
BORGWARNER INC (US)
HOLMES GARRETT R (US)
HOLMES GARRETT R (US)
International Classes:
F16K31/06; F15B13/044; H01F7/16
Foreign References:
| US20100139795A1 | 2010-06-10 | |||
| US6435472B1 | 2002-08-20 | |||
| US7458561B2 | 2008-12-02 | |||
| EP0711944A1 | 1996-05-15 |
Other References:
See also references of EP 2681476A4
Attorney, Agent or Firm:
HELMHOLDT, Thomas D. et al. (3408 Greenspring LaneRochester Hills, Michigan, US)
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