Method of operating a fuel injector

Details Method of operating a fuel injector Method of operating a fuel injector

2011-03-15

2011-03-15

McCall, Eric S (Department: 2855)

Measuring and testing

Internal combustion engine or related engine system or...

Fuel system or part thereof

Reexamination Certificate

active

07905136

ABSTRACT:
A method for operating an injection valve, in particular a fuel injector of an internal combustion engine, in which a trigger voltage is able to be applied to an actuator, designed as piezoelectric element, of the fuel injector in order to induce an injection of fluid, in particular fuel, supplied to the fuel injector via a supply system. A specifiable test voltage is applied to the actuator in a test triggering, and a fluid pressure prevailing in the supply system is detected at least during the test triggering in order to derive information about an operating state of the fuel injector and/or the actuator from the test voltage and the detected fluid pressure.

REFERENCES:
patent: 6712047 (2004-03-01), Rueger
patent: 7210458 (2007-05-01), Walther et
patent: 2003/0154806 (2003-08-01), Rueger
patent: 2007/0001545 (2007-01-01), Schoor et al.
patent: 2007/0182280 (2007-08-01), Huber et al.

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