Internal-combustion engines – Charge forming device – With fuel pump
Patent
1983-07-05
1985-01-22
Moy, Magdalen Y. C.
Internal-combustion engines
Charge forming device
With fuel pump
417499, F02M 5944
Patent
active
044945132
ABSTRACT:
The pump housing has at least one pump accommodating space formed therein, in which a pump element and an element holder are fitted. The element holder has a sleeve portion axially extending at least as far as a location facing a feed hole formed in the plunger barrel of the pump element, and defining a fuel chamber between itself and the plunger barrel, in which the feed hole opens. The sleeve portion of the element holder has at least one fuel supply hole formed therein and opening in the fuel chamber at a location which is different from that of the feed hole in at least one of the axial and circumferential directions of the sleeve portion and the plunger barrel. Immediately upon completion of each delivery stroke of the plunger, pressurized fuel flowing back from the delivery chamber in the plunger barrel into the fuel chamber through the feed hole collides with the inner peripheral surface of the sleeve portion of the element holder, thereby preventing erosion of the pump housing.
REFERENCES:
patent: 2185144 (1939-12-01), Edwards
patent: 2975776 (1961-03-01), Nicolls
patent: 4222717 (1980-09-01), Clouse et al.
Diesel Kiki Co. Ltd.
Moy Magdalen Y. C.
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