Fuel injection pump for internal combustion engines

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

1986-05-14

1987-03-24

Smith, Leonard E.

Pumps

Expansible chamber type

Pumping member position controlled port

123449, 123496, F02M 4100

Patent

active

046522212

ABSTRACT:
A fuel injection pump for an internal combustion engine comprises a cam disc having a camming surface which, when the cam disc is rotatively driven, causes a plunger to be rotated and reciprocated to allow drawn fuel to be pressurized and distributed, to thereby deliver the pressurized fuel to the engine. The camming surface is configurated such that the plunger is moved substantially at a contant velocity in a fuel injection region for the engine idling, and after the termination of the fuel injection region the velocity of movement of the plunger is increased to a value higher than that in the fuel injection region for the engine idling. Delivery valves, through which fuel pressurized by the plunger is supplied to the engine, are each adapted to maintain a residual pressure within a corresponding injection pipe at a value that enables to attain injection initiating pressure within an extent of rotation of the cam disc corresponding to the fuel injection region for the engine idling.

REFERENCES:
patent: 3312209 (1967-04-01), Chmura
patent: 4129253 (1978-12-01), Bader, Jr. et al.
patent: 4537171 (1985-08-01), Kuroyanagi

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