Title:
CHECK VALVE FOR HIGH-PRESSURE FUEL INJECTOR
Document Type and Number:
WIPO Patent Application WO/2012/075483
Kind Code:
A3
Abstract:
A fuel injector comprises a pressurization section defining a variable-volume pressurization chamber. A nozzle section has a longitudinal bore, a nozzle chamber, an orifice and a nozzle valve. The nozzle valve is slides in the longitudinal bore between a first position that blocks fluid communication between the nozzle chamber and the orifice, and a second position that opens fluid communication between the nozzle chamber and the orifice. A check valve is between the pressurization chamber and the nozzle chamber. The check valve comprises a housing comprising an upper portion, a lower portion and a middle portion. The housing defines a check valve chamber. A valve member in the check valve chamber hydro-pneumatically moves between an open position that allows fluid communication from the pressurization chamber to the nozzle chamber and a closed position that prevents fluid communication from the nozzle chamber to the pressurization chamber.
Inventors:
SCHULZ KEITH STEVEN (US)
Application Number:
PCT/US2011/063255
Publication Date:
April 18, 2013
Filing Date:
December 05, 2011
Export Citation:
Assignee:
SCHULZ KEITH STEVEN (US)
INT ENGINE INTELLECTUAL PROP (US)
INT ENGINE INTELLECTUAL PROP (US)
International Classes:
F02M47/02; B05B1/30; F02M41/16
Foreign References:
| US4513719A | 1985-04-30 | |||
| US5923429A | 1999-07-13 | |||
| US6363913B1 | 2002-04-02 | |||
| US6568602B1 | 2003-05-27 |
Attorney, Agent or Firm:
NIMZ, Jack D. (Warrenville, Illinois, US)
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