Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2005-05-10
2005-05-10
Huynh, Hai (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S500000, C123S508000, C239S533120
Reexamination Certificate
active
06889658
ABSTRACT:
The fuel injection system has one high-pressure fuel pump (10) with a pump work chamber (22) and one fuel injection valve (12), communicating with the pump work chamber, for each cylinder of the engine. The fuel injection valve (12) has a first injection valve member (28), by which at least a first injection opening (32) is controlled, and which is movable in an opening direction (29) counter to a closing force by the pressure generated in the pump work chamber (22). Inside the hollow first injection valve member (28), a second injection valve member (128) is guided displaceably, by which at least a second injection opening (132) is controlled, and which is movable by the pressure prevailing in the pressure chamber (40) in an opening direction (29) counter to a closing force; the second injection valve member (128) is acted upon at least indirectly by the pressure prevailing in a fuel-filled control chamber (50), which pressure is generated, as a function of operating parameters of the engine, by a feed pump (52) such that the second injection valve member (128) either remains in its closed position, or can open.
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Allio Philippe
Boehland Peter
Buehler Christoph
Kuegler Thomas
Mack Gerhard
Greigg Ronald E.
Huynh Hai
Robert & Bosch GmbH
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