Method for controlling a piezo-actuated fuel-injection valve

Details Method for controlling a piezo-actuated fuel-injection valve Method for controlling a piezo-actuated fuel-injection valve

2006-05-09

2006-05-09

Gimie, Mahmoud (Department: 3747)

Internal-combustion engines

Charge forming device

With fuel pump

C123S478000

Reexamination Certificate

active

07040297

ABSTRACT:
The current guided to the piezo actuator and the voltage which is consequently established thereon is used for calculating with the help of a non-linear actuator model, the characteristics of the longitudinal variations (s) and the force (F) exerted by the actuator (F), and variables therefrom or the derived variables (dF/dt) therefrom determine the beginning of the opening (tA) of a servovalve and the duration of injection (D).

REFERENCES:
patent: 4887569 (1989-12-01), Igashira et al.
patent: 6121715 (2000-09-01), Hoffmann et al.
patent: 6236190 (2001-05-01), Hoffmann et al.
patent: 6691682 (2004-02-01), Rueger et al.
patent: 43 08 811 (1994-01-01), None
patent: 199 30 309 (2001-01-01), None
patent: 199 60 971 (2001-03-01), None
patent: 199 30 309 (2001-12-01), None
patent: WO 94/13991 (1994-06-01), None
patent: WO 99/67527 (1999-12-01), None

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