Method and device for controlling piezo-driven fuel...

Details Method and device for controlling piezo-driven fuel... Method and device for controlling piezo-driven fuel...

2005-01-25

2005-01-25

Vo, Hieu T. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C123S478000, C123S446000, C073S114220, C310S316030

Reexamination Certificate

active

06847881

ABSTRACT:
The force exerted on an injector valve (4, 5), by the piezo-actuator (3) on a main injection, is determined by means of a non-linear actuator model (8) and thus the gradient (−dFHdt) of the drop-off in force after the force maximum (FHmax) and a threshold value (G) are derived, with which a gradient (−dFV/dt) determined for the pre- or post-injection is compared and, depending on the result of the comparison, the signal parameter (p) for the subsequent pre- or post-injection(s) is corrected.

REFERENCES:
patent: 4019481 (1977-04-01), Lakra
patent: 4432228 (1984-02-01), Kuschmierz et al.
patent: 6486587 (2002-11-01), Klenk et al.
patent: 43 08 811 (1994-01-01), None
patent: 43 12 587 (1994-10-01), None
patent: 199 21 456 (2000-11-01), None
patent: 199 30 309 (2001-01-01), None
patent: 199 30 309 (2001-12-01), None
patent: WO9967527 (1999-12-01), None

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