Method for determining the activation voltage of a...

Details Method for determining the activation voltage of a... Method for determining the activation voltage of a...

2004-07-10

2008-11-25

Dougherty, Thomas M (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S317000

Reexamination Certificate

active

07456545

ABSTRACT:
A method for determining the activation voltage of a piezoelectric actuator of at least one injector which is used to inject a liquid volume under high pressure into a cavity, in particular into a combustion chamber of an internal combustion engine, the activation voltage being varied as a function of the pressure used to pressurize the liquid volume. A drift of the activation voltage (voltage requirement) required for a predefined lift of a control valve of the injector is controlled on an injector-specific basis by controlling the difference between the cutoff-voltage threshold and the final steady-state voltage to a setpoint value predefined for one operating point.

REFERENCES:
patent: 6784596 (2004-08-01), Rueger et al.
patent: 2004/0169436 (2004-09-01), Fukagawa et al.
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patent: 101 55 391 (2003-05-01), None
patent: 1 138 909 (2001-10-01), None
patent: 1 172 541 (2002-01-01), None

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