Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2006-01-24
2006-01-24
Miller, Carl S. (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S325000, C123S332000, C123S19800E
Reexamination Certificate
active
06988487
ABSTRACT:
The present invention provides a fuel injection control device which can prevent the occurrence of a phenomenon that when a pressure of fuel in the inside of a pressure storage chamber is elevated during a fuel cut, and the injection of fuel is restarted, the fuel is injected at a high fuel pressure largely different from a target fuel pressure. Accordingly, the fuel injection control device can prevent the deterioration of an exhaust gas and the occurrence of an engine stop. The fuel injection control device includes fuel injection valve control means which performs a driving control of the fuel injection valves, a fuel pressure sensor which detects a fuel pressure in the inside of the pressure storage chamber, a discharge amount control valve which controls a fuel amount supplied from the high-pressure pump to the pressure storage chamber, and fuel pressure control means which controls the discharge amount control valve such that the fuel pressure in the inside of the pressure storage chamber agrees with a target fuel pressure, wherein when the fuel pressure in the inside of the pressure storage chamber assumes a given pressure state during a fuel cut control, the forced fuel injection control means gives a driving instruction to the fuel injection valve control means to interrupt the fuel cut control thus enabling forced driving of the fuel injection valves of given cylinders.
REFERENCES:
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patent: 4941442 (1990-07-01), Nanyoshi et al.
patent: 5924403 (1999-07-01), Thomas
patent: 6105554 (2000-08-01), Nishiyama
patent: 2003/0136373 (2003-07-01), Naik
patent: 11-82105 (1999-03-01), None
Date Toshiaki
Oono Takahiko
Miller Carl S.
Mitsubishi Denki & Kabushiki Kaisha
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