Fuel injection pump having variable prestroke mechanism

Details Fuel injection pump having variable prestroke mechanism Fuel injection pump having variable prestroke mechanism

1986-05-12

1988-04-12

Croyle, Carlton R.

Pumps

Expansible chamber type

Pumping member position controlled port

123500, 123503, F04B 704, F02M 3704, F02M 5920

Patent

active

047370866

ABSTRACT:
A fuel injection pump includes a reciprocating plunger and a control sleeve slidably fitted over the plunger, the prestroke of which is varied by vertical movement of the control sleeve. The control sleeve is provided at its upper end with a fuel discharge groove, through which the fuel contained in a fuel-pressurizing chamber is discharged after the end of injection. The control sleeve also has to pressure escape passage. A variation in the effective stroke allows the pressure of fuel contained in the fuel-pressurizing chamber to be selectively regulated by the pressure escape passage, thereby controlling the pressure of fuel to be injected.

REFERENCES:
patent: 1819015 (1931-08-01), Benes
patent: 2731917 (1956-01-01), Evans
patent: 3138103 (1964-06-01), Dreisin
patent: 3371610 (1968-03-01), DeLuca
patent: 4649883 (1987-03-01), Bohringer

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