End of valve motion detection for a spool control valve

Details End of valve motion detection for a spool control valve End of valve motion detection for a spool control valve

2005-03-15

2005-03-15

Nguyen, Dinh Q. (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Processes

Of fuel injection

C239S088000, C239S585100, C239S124000, C123S508000, C137S554000

Reexamination Certificate

active

06866204

ABSTRACT:
A fuel injector system (10) includes a piezoelectric sensor (52) mounted along a spool valve 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.

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Specification for U.S. Appl. No. 10/095,805, filed Mar. 12, 2002.
PCT International Search Report for Application No. PCT/US02/10899 dated Aug. 8, 2002.

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