Fuel injection pump for internal combustion engines, in particul

Details Fuel injection pump for internal combustion engines, in particul Fuel injection pump for internal combustion engines, in particul

1976-01-19

1977-08-16

Geoghegan, Edgar W.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123139R, F02M 3900

Patent

active

040419193

ABSTRACT:
A fuel injection pump includes a cam which is movable to vary the timing of delivery of fuel by the injection pump. The cam is acted upon by a first piston which is subjected to the outlet pressure of a supply pump the piston acting on the cam to advance the timing of delivery of fuel. A second piston is provided which is subjected to the outlet pressure of the feed pump only when the engine speed attains a predetermined value. The first piston can move the cam against the action of a first light spring and a second relatively strong spring, the second spring being prestressed and being accommodated in the second piston.

REFERENCES:
patent: 2833263 (1958-05-01), Evans
patent: 3314406 (1967-04-01), Kemp et al.
patent: 3446148 (1969-05-01), Glikin et al.

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