Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2005-12-13
2005-12-13
Gimie, Mahmoud (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S299000
Reexamination Certificate
active
06973918
ABSTRACT:
A fuel injection apparatus having a high-pressure fuel pump and a fuel injection valve for each cylinder. An electrically actuated control valve controls a connection of the pump working chamber to a discharge region. A first injection valve element controls at least one first injection opening and a second injection valve element guided inside the first injection valve element controls at least one second injection opening. Pressure in a control chamber acts on the second injection valve element at least indirectly in the closing direction. By means of a connection controlled by a valve, the control pressure chamber is connected to a pressure region in which a respective pressure increase and decrease are delayed in relation to pressure in the pump working chamber when the control valve respectively closes and opens. The valve is acted on in the opening direction by the pressure prevailing in the pressure region and the closing direction by the pressure prevailing in the pump working chamber.
REFERENCES:
patent: 6378503 (2002-04-01), Lambert
patent: 6725838 (2004-04-01), Shafer et al.
patent: 6769635 (2004-08-01), Stewart et al.
Boehland Peter
Reiser Tobias
Gimie Mahmoud
Greigg Ronald E.
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