Electromagnetic unit fuel injector with piston assist solenoid actuated control valve
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United States of America Patent
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Nov 5, 1985
Grant Date -
N/A
app pub date -
Aug 6, 1984
filing date -
Aug 6, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electromagnetic unit fuel injector includes a pump assembly having an external actuated plunger reciprocable in a bushing with flow therefrom during a pump stroke being directed to a fuel injection nozzle of the assembly. Fuel flow from the pump can also flow through a passage means, containing a normally open, substantially pressure-balanced control valve actuated by a solenoid assembly in the valve closing direction to block drain flow during a pump stroke, as desired. A piston, actuated by discharge fuel pressure is operatively connected to the control valve to assist the solenoid in holding the control valve in a closed position.
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