Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1987-09-25
1989-01-17
Miller, Carl Stunt
Internal-combustion engines
Charge forming device
Fuel injection system
123446, 123458, 239585, F02M 3900
Patent
active
047981865
ABSTRACT:
The movement of an injector valve member (52) which closes and temporarily opens discharge orifices (58) communicating with the combustion chamber of an internal combustion engine is controlled by the fuel pressure in a control chamber (72) and by a difference in the pressure forces acting on a piston (60) having two sections (63, 69) with different diameters arranged at one end of the valve member (52). The pressure in the control chamber (72) to control the movement of the valve member (52) is controlled by means of two axially aligned orifices (67, 70) and by a solenoid valve (S) for closing and temporarily opening one of said orifices (70). A member (71) and the top end of the thicker section (69) of the piston (60) define said control chamber (72). Said thicker section (69) guides said member (71) at its inside, while the latter is not guided on its circumference (71b). The thinner section (63) of piston (60) is guided in the injector housing (44). The piston (60) is provided with a bore (65) connecting a chamber (46) communicating with the discharge orifices (58) across the other orifices (67) with the control chamber (72).
REFERENCES:
patent: 3464627 (1969-09-01), Huber
patent: 3610529 (1971-10-01), Huber
patent: 3908621 (1975-09-01), Hussey
patent: 4448168 (1984-05-01), Komada
patent: 4545352 (1985-10-01), Jourde
patent: 4566416 (1986-01-01), Berchtold
patent: 4603671 (1987-08-01), Yoshinaga
patent: 4669429 (1987-06-01), Nishida
Ganser-Hydromag
Miller Carl Stunt
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