Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1979-03-21
1981-08-18
Levy, Stuart S.
Internal-combustion engines
Charge forming device
Fuel injection system
123502, 2395338, 2395339, F02M 4700, F02M 6110
Patent
active
042840490
ABSTRACT:
Control of valve needle lift in fuel injections for direct-injection internal combustion engines wherein an injector having at least one fuel supply pipe and one leak-off pipe is provided with a nozzle body in which is situated an axially slidably supported valve needle which is maintained by the force of at least one closing spring in its closing position and capable of being lifted off its valve seat by the pressure of the fuel. A sleeve is provided with connecting ports or openings in the injector which sleeve is capable of being moved axially by means of a hydraulic control medium. The connecting openings or ports can be covered by a piston when the end face of the sleeve is acted upon by the control medium, and when the valve needle is lifted off its valve seat, permitting the valve needle lift to be reduced.
REFERENCES:
patent: 1834224 (1931-12-01), Salisbury
patent: 2997994 (1961-08-01), Falberg
patent: 3043282 (1962-07-01), Janicke
patent: 3640466 (1972-02-01), Steiger
patent: 3951117 (1976-04-01), Perr
patent: 3952711 (1976-04-01), Kimberley
patent: 3973536 (1976-08-01), Zelders
patent: 4170974 (1979-10-01), Kopse et al.
patent: 4187822 (1980-02-01), Craven et al.
Levy Stuart S.
Maschinenfabrik Augsburg-Nurnberg Aktiengesellschaft
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