Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1999-11-18
2000-07-25
Miller, Carl S.
Internal-combustion engines
Charge forming device
Fuel injection system
123467, F02M 3704
Patent
active
060925094
ABSTRACT:
During a transitional operation of an engine in which an engine load is changed suddenly from a high load to a low load, a control operation for extending an opening period of a change-over valve which is adapted to switch a low-pressure accumulator and a high-pressure accumulator from one to the other during a fuel injection operation is carried out to increase a flow rate of a fuel supplied to the low-pressure accumulator and thereby reduce the pressure in the high-pressure accumulator, whereby a response delay of the fuel pressure in the high-pressure accumulator is minimized. During a transitional operation of the engine in which the engine is in an accelerated operation, the change-over valve is kept open until the fuel pressure in the low-pressure accumulator, which is connected to the portion of a fuel passage which is on the downstream side of the change-over valve adapted to switch the low-pressure accumulator and high-pressure accumulator from one to the other during a fuel injection operation, reaches an indicated level, and until a predetermined period of time elapses after the fuel injection finishing time, whereby the formation of a fuel pressure in the low-pressure accumulator is promoted to obtain injection condition suiting the operating condition of the engine.
REFERENCES:
patent: 5146894 (1992-09-01), Rembold
patent: 5619969 (1997-04-01), Liu
patent: 5619970 (1997-04-01), Collingborn
patent: 5622152 (1997-04-01), Ishida
patent: 5642714 (1997-07-01), Buckley
patent: 5732679 (1998-03-01), Takahasi
patent: 5839413 (1998-11-01), Krause
Kohketsu Susumu
Tanabe Keiki
Miller Carl S.
Mitsubishi Jidosha Kogyo Kabushiki Kaisha
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