F - Mech Eng,Light,Heat,Weapons – 02 – M
Patent
F - Mech Eng,Light,Heat,Weapons
02
M
123/140
F02M 61/06 (2006.01) F02M 57/02 (2006.01)
Patent
CA 1131519
FUEL INJECTOR ABSTRACT OF THE DISCLOSURE This disclosure relates to a unit-type fuel injector for an internal combustion engine such as a reciprocating piston internal combustion engine. The injector includes an injector body forming a plunger bore, and a plunger that reciprocates in the bore. A fuel supply passage and a drain passage are formed in the body, and a fuel injection chamber is formed at the lower end of the plunger bore. A feed hole connects the chamber with the supply passage, and a scavange passage connects the supply and drain passages. During a retracted plunger, or fuel metering, portion of the injector cycle, the plunger opens the feed hole and closes the scavange passage, and during a down plunger, or scavenging, portion of the injector cycle, the plunger closes the feed hole and opens the scavange passage. An annular groove is formed between injector parts and surrounds the chamber, and the groove collects leakage. A restricted bleed hole connects the groove with the low pressure drain and removes the leakage. The feed hole is at an end of the supply passage, and the incoming fuel flows in a direct path through the supply passage and feed hole to the injection chamber.
355334
Gaal Stephen L.
Gant Gary L.
Muntean George L.
Reiners Neville H.
Shea Michael H.
Cummins Engine Company Inc.
Meredith & Finlayson
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