Electromagnetic unit fuel injector

Details Electromagnetic unit fuel injector Electromagnetic unit fuel injector

1984-04-02

1986-02-04

Nase, Jeffrey V.

Fluid sprinkling, spraying, and diffusing

Unitary injection nozzle and pump or accumulator plunger

239585, F02M 5100

Patent

active

045680213

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 open at one end for the discharge of fuel to a spring biased, pressure actuated fuel injection nozzle. The pump chamber is also connected to a supply/spill chamber via a normally open, hollow, ported valve controlled passage to permit the ingress and egress of fuel, the valve being operated by a solenoid. The stator assembly of the solenoid is fixed to the housing over the supply/spill chamber and has a cover fixed thereto to define an armature chamber for a moveable armature. The solenoid pole piece has a stepped bore therethrough to interconnect the armature chamber and the supply/spill chamber. The armature is operatively connected to the valve by a guide pin slidably and sealingly journaled in a non-magnetic bushing fixed in the stepped bore so that the armature chamber remains dry.

REFERENCES:
patent: 3606158 (1969-11-01), Pritchard
patent: 4373671 (1983-02-01), Giardini
patent: 4408718 (1983-11-01), Wich

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