Fuel injection system

Details Fuel injection system Fuel injection system

1982-01-15

1984-07-17

Lazarus, Ira S.

Internal-combustion engines

Charge forming device

Fuel injection system

123447, F02M 3900

Patent

active

044599595

ABSTRACT:
A fuel injection system includes a booster for intensifying a supply of fuel from a fuel reservoir and a nozzle needle actuator for operating a fuel injector to start and terminate a fuel injection from the latter. The boosted fuel from the booster is fed not only to the fuel injector but to an upper chamber of the nozzle needle actuator which is defined by a piston. A first hydraulic circuit produces a variable hydraulic fluid pressure for operating the booster in accordance with a predetermined engine operating parameter. A lower chamber also defined by the piston in the nozzle needle actuator is selectively communicated to the first hydraulic circuit by a second hydraulic circuit. The first and second hydraulic circuits share a common source of hydraulic fluid supply which is independent of the fuel reservoir.

REFERENCES:
patent: 3872850 (1975-03-01), Littlehales
patent: 3943901 (1976-03-01), Takahashi et al.
patent: 4069800 (1978-01-01), Kanda et al.
patent: 4089315 (1978-05-01), Lakra
patent: 4216754 (1980-08-01), Lakra
patent: 4249497 (1981-02-01), Eheim et al.
patent: 4297982 (1981-11-01), Lakra

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