Method for operating an internal combustion engine

Details Method for operating an internal combustion engine Method for operating an internal combustion engine

2003-07-02

2008-05-20

Miller, Carl S. (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C123S472000, C239S102200

Reexamination Certificate

active

07373927

ABSTRACT:
A method for operating an internal combustion engine in which a valve needle of a fuel injector is adjusted from a closing position via an intermediate position to an opening position and back again. The adjustment is carried out with the aid of a piezoelectric actuator to which a trigger signal is applied. To reduce the contamination danger of the fuel injector and to keep wear of the valve needle low, the trigger signal for triggering the piezoelectric actuator has a greater slope steepness during the transition of the valve needle from the closing position to the intermediate position than during the transition of the valve needle from the intermediate position to the opening position.

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