Fuel injection pump for an internal combustion engine

Details Fuel injection pump for an internal combustion engine Fuel injection pump for an internal combustion engine

1984-05-02

1986-01-14

Freeh, William L.

Pumps

Expansible chamber type

Moving cylinder

417221, 123300, 123450, F04B 1902

Patent

active

045643415

ABSTRACT:
A member is formed with first and second cam protrusions. First and second movable plungers define a common pumping chamber, the volume of which varies in accordance with the position of each of the plungers. The plungers alternately engage the cam protrusions and are reciprocated thereby in synchronism with rotation of an engine crankshaft. Fuel is supplied to the pumping chamber as the pumping chamber expands. The fuel is directed out of the pumping chamber toward an engine combustion chamber to effect a fuel injection stroke as the pumping chamber contracts. The timing of engagement of one of the plungers with one of the cam protrusions and the timing of engagement of the other plunger with the other cam protrusion are offset by a preset angular interval with respect to rotation of the crankshaft, the interval being chosen so that the rate of fuel injection during an initial stage of the fuel injection stroke is relatively small.

REFERENCES:
patent: 2278245 (1942-03-01), Colell
patent: 2674236 (1954-04-01), Humber
patent: 2946292 (1960-07-01), Chmielecki
patent: 3759239 (1973-09-01), Regneault et al.
patent: 3827419 (1974-08-01), Isomura
patent: 4140095 (1979-02-01), Mowbray
patent: 4173959 (1979-11-01), Sosnowski et al.
patent: 4242059 (1980-12-01), Mowbray
patent: 4294210 (1981-10-01), Bassoli et al.

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