Method for ascertaining the position of a mobile closing...

Details Method for ascertaining the position of a mobile closing... Method for ascertaining the position of a mobile closing...

2007-07-03

2007-07-03

Moulis, Thomas (Department: 3747)

Internal-combustion engines

Charge forming device

With fuel pump

C123S494000

Reexamination Certificate

active

11089169

ABSTRACT:
In a method for ascertaining the position of a mobile closing element of an injector valve in a motor vehicle engine, in which the closing element is driven by a piezoelectric element for opening or closing the injection valve and a voltage signal allocated to an electrical voltage recorded on the piezoelectric element, the position of the closing element is ascertained from the ascertained voltage signal. Through a two-way valve arranged on the injection valve, a change in the voltage signal is brought about based upon a change in the electrical voltage on the piezoelectric element as a function of the position of the closing element.

REFERENCES:
patent: 6968829 (2005-11-01), Joos et al.
patent: 2006/0255302 (2006-11-01), Aspelmayr et al.
patent: 2007/0001545 (2007-01-01), Schoor et al.
patent: 19930309 (2001-12-01), None

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