Fuel injection pump for internal combustion engine

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

1986-07-03

1988-05-03

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Fuel injection system

123503, 123506, 417494, F02M 5924

Patent

active

047413140

ABSTRACT:
A fuel injection pump for internal combustion engines is proposed wherein control over the injected fuel quantity is exercised by regulating the outlet (C) of a second relief line (33) of the working space (5) of the fuel injection pump by means of a control edge (25) positionable as a function of load and/or speed in the part-load range, and optionally of the first outlet cross-sectional area (D), displaced along the stroke, of a first relief line (15). In full-load operation, the effective length of the delivery stroke is limited by opening a relief opening (E) carried by the pumping plunger at a control edge (9). To obtain delivery at reduced fuel injection rate, especially at no load or low load, over as long a stroke length (h.sub.L) as possible, fuel-quantity control is effected, first, with respect to the duration of injection, by means of the control edge (25) which controls the outlet (C), and secondly, by opening, at a constant point along the stroke, the relief opening (E). The leakage rate per plunger stroke can be predetermined by means of a throttle (34) located at the outlet (E).

REFERENCES:
patent: 3942914 (1976-03-01), Hofer et al.
patent: 4271808 (1981-01-01), Kobayashi et al.
patent: 4407253 (1983-10-01), Bauer
patent: 4635605 (1987-01-01), Faupel et al.

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