Fuel injection pump for internal combustion engines

Details Fuel injection pump for internal combustion engines Fuel injection pump for internal combustion engines

1993-03-12

1994-06-21

Bertsch, Richard A.

Pumps

Expansible chamber type

Pumping member position controlled port

417499, 123503, F02M 5926

Patent

active

053224230

ABSTRACT:
A fuel injection pump for internal combustion engines having a pump piston driven to reciprocate by a cam drive, guided axially in a cylinder bore of a cylinder bush in which with one face end the pump piston defines a pump work chamber. The control piston has on a jacket face an oblique control edge that cooperates with a control opening in the cylinder bore. This control opening is embodied in an oval shape for the sake of a slight prepumping effect at the injection onset and a rapid opening at the end of injection, and is disposed obliquely enough in the cylinder liner so that a longitudinal axis of the oval extends approximately parallel to the oblique control edge.

REFERENCES:
patent: Re20573 (1937-12-01), L'Orange
patent: 1958948 (1934-05-01), Knecht
patent: 2007871 (1935-07-01), Oldham
patent: 2131228 (1938-09-01), L'Orange
patent: 3179053 (1965-04-01), Jordan
patent: 3737258 (1973-06-01), Krauta et al.
patent: 4490098 (1984-12-01), Freudenschuss et al.
patent: 4811716 (1989-03-01), Guntert et al.
patent: 5209208 (1993-05-01), Siebert et al.

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