Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1981-07-15
1983-05-03
Myhre, Charles J.
Internal-combustion engines
Charge forming device
Fuel injection system
123447, 123500, 123501, F02M 5100
Patent
active
043817505
ABSTRACT:
A fuel injection apparatus for internal combustion engines, which includes a servo piston having a large size portion and a small size portion. The large size portion defines a servo-pressure chamber and a counter-servo-pressure chamber, and the small size portion a pump working chamber, respectively. Operating fluid is supplied from an exclusive pressure feed means to the servo-pressure chamber and the counter-servo-pressure chamber alternately through the action of a solenoid controlled selector valve, while fuel is supplied to the pump working chamber from another pressure feed means provided separately from the firstmentioned pressure feed means. The large size portion of the servo piston has its outer peripheral surface formed with an oblique-base notch opening in its end face facing the servo-pressure chamber. The piston housing has its peripheral wall formed with a spill port which is located for engagement with the oblique-base notch. The compression or delivery stroke of the servo piston varies as the servo piston is rotated. Thus, control of the fuel injection quantity can be effected by changing the circumferential position of the servo piston. The fuel injection beginning can be controlled by changing the timing of change of the valve position of the selector valve.
REFERENCES:
patent: 3516395 (1970-06-01), Bassot et al.
patent: 3943901 (1976-03-01), Takahashi et al.
patent: 4089315 (1978-05-01), Lakra
patent: 4280464 (1981-07-01), Kanai et al.
patent: 4327694 (1982-05-01), Henson et al.
Diesel Kiki Co. Ltd.
Moy Magdalen
Myhre Charles J.
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