Electromagnetic unit fuel injector
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United States of America Patent
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-
Nov 13, 1984
Grant Date -
N/A
app pub date -
Sep 6, 1983
filing date -
Sep 6, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electromagnetic unit fuel injector for use in a diesel engine includes a housing with a pump therein defined by an externally actuated plunger reciprocable in a bushing and defining therewith a pump chamber for the discharge of fuel to a spring biased, pressure actuated fuel injection nozzle. The pump chamber is also connected to a fuel chamber via a solenoid actuated, normally open, pressure balanced control valve controlled passage to permit the ingress and egress of fuel. The solenoid and control valve are located concentrically with respect to the plunger. During a pump stroke, the solenoid can be energized to move the valve in position to block flow from the pump chamber to the fuel chamber so as to allow the pressurization of fuel by the pump to effect discharge of fuel from the injection nozzle.
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