Injection pump for internal combustion engines

Details Injection pump for internal combustion engines Injection pump for internal combustion engines

1989-04-05

1991-05-14

Rivell, John

Pumps

Expansible chamber type

Pumping member position controlled port

417490, 123447, 123467, F02M 5944

Patent

active

050151606

ABSTRACT:
An injection pump for internal combustion engines having a pump piston bushing, a pump piston, guided in the bushing, including control edges for controlling the beginning and end of an injection event. The control edges cooperate with control bores provided in the wall of the pump piston bushing that discharge into a reservoir chamber surrounding the pump piston bushing; fuel can be delivered into this chamber under pressure, and excess fuel, or fuel overflowing at the end of an injection event, can be diverted from it. For the fuel delivery, a suction valve opening to the reservoir chamber is connected to the reservoir chamber, while for the fuel diversion, a check valve in the form of a pressure maintenance valve that opens away from the reservoir chamber is connected to the reservoir chamber. This pressure maintenance valve may be preceded on the inlet side by a throttle restriction.

REFERENCES:
patent: 2131779 (1938-10-01), Zwick et al.
patent: 2157737 (1939-05-01), Janssen
patent: 2298936 (1942-10-01), Gambrell
patent: 3759239 (1973-09-01), Regneault et al.
patent: 3990413 (1976-11-01), Pischinger
patent: 4118156 (1978-10-01), Ivosevic
patent: 4355961 (1982-10-01), Riggs
patent: 4513719 (1985-04-01), Edo
patent: 4633836 (1987-01-01), Faupel
patent: 4690624 (1987-09-01), Schwartz

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