Unit injector

Details Unit injector Unit injector

1989-05-17

1989-12-19

Smith, Leonard E.

Pumps

Expansible chamber type

Pumping member position controlled port

417570, F02M 5946

Patent

active

048879550

ABSTRACT:
A unit injector for fuel combustion is integrally structured with an injection pumping mechanism and an injection valve mechanism. A housing is fixedly united with an injection pumping part and an injection valve part, the injection pumping part being formed with a stepped insertion hole, and the injection valve part being formed with an oil path extending toward a nozzle body at an end thereof concentrically. A barrel has a hole for guiding a plunger, and fuel inlet and outlet ports, the shape and outer diameter of which are finishing-processed for coinciding with the insertion hole, and the barrel is shrunken in size by cooling and inserted into the insertion hole while it is cooled, and exactly fitted into the insertion hole when the shrinked barrel is recovered to the initial size by returning to the room temperature and supported at an inner diametered part and a stepped part.

REFERENCES:
patent: 2449120 (1948-09-01), Johnson
patent: 2612841 (1952-10-01), Lasley
patent: 2793078 (1957-05-01), Brill
patent: 4222717 (1980-09-01), Clouse et al.
patent: 4365745 (1982-12-01), Beck
patent: 4530355 (1985-07-01), Torizuka
patent: 4541789 (1985-09-01), Nothdurft

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