Title:
END OF MOTION DETECTION FOR SPOOL CONTROL VALVE
Document Type and Number:
WIPO Patent Application WO2002084093
Kind Code:
A3
Abstract:
A fuel injector system (10) includes a piezoelectric sensor (52) mounted along a spool axis (18) of the injector body (12). The piezoelectric sensor (52) is mounted within a spool valve stop (41). As the spool valve (16) reaches the stop (41), the piezoelectric sensor (52) identifies the force exerted thereupon and transmits the generated signal to the controller (44). Through communication with piezoelectric sensor (52) the controller determines when the spool valve (16) has reached a predetermined position.
Inventors:
BECHER JEORG CHRISTOPH
HAMMER GUENTER
HAMMER GUENTER
Application Number:
PCT/US2002/010899
Publication Date:
March 20, 2003
Filing Date:
April 08, 2002
Export Citation:
Assignee:
SIEMENS VDO AUTOMOTIVE CORP (US)
International Classes:
F02D41/40; F02M57/02; F02M65/00; (IPC1-7): F02D41/40; F02M47/02; F02M51/06; F02M65/00
Domestic Patent References:
| WO1998011334A2 | 1998-03-19 |
Foreign References:
| US5988142A | 1999-11-23 | |||
| US6196184B1 | 2001-03-06 | |||
| US4503820A | 1985-03-12 | |||
| US3596507A | 1971-08-03 |
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