Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1998-04-02
2000-05-23
Moulis, Thomas N.
Internal-combustion engines
Charge forming device
Fuel injection system
123496, F02M 3704
Patent
active
060654503
ABSTRACT:
A fuel injection system includes a plurality of hydraulically actuated fuel injectors with direct control needle valves. Each injector has an injector body that defines an actuation fluid inlet, a fuel supply passage and a needle control chamber. A needle valve member is movably mounted in the injector body and has a closing hydraulic surface exposed to pressure in the needle control chamber. Each injector also includes a relatively slow moving actuation fluid control valve member and a relatively fast moving needle control valve member. A source of low pressure fluid is connected to the fuel supply passage, and a source of high pressure fluid is connected to the actuation fluid inlet.
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Chen Shikui K.
Hefler Gregory W.
Caterpillar Inc.
McNeil Michael
Moulis Thomas N.
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