Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2009-01-29
2011-11-22
Gimie, Mahmoud (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S514000
Reexamination Certificate
active
08061331
ABSTRACT:
Disclosed herein is a fuel injector for an internal combustion engine, which includes a high pressure pump for pressure feeding high pressure fuel of the internal combustion engine; a fuel rail for accumulating the fuel that has been pressure fed by the high pressure pump; an injection valve for injecting, into a cylinder, the fuel accumulated in the fuel rail; a fuel pressure sensor for detecting the pressure of the fuel that is accumulated in the fuel rail; an electromagnetic relief valve for discharging the pressure accumulated fuel of the fuel rail; and an electronic control unit for controlling opening and closing of the electromagnetic relief valve. The electronic control unit repeats the opening and closing of the relief valve to discharge the fuel pressure in stages so that the fuel pressure in the fuel rail is decreased down to the target fuel pressure.
REFERENCES:
patent: 6854445 (2005-02-01), Okamoto
patent: 2005/0199219 (2005-09-01), Utsumi
patent: 2008/0059039 (2008-03-01), Nakagawa et al.
patent: 2009/0240417 (2009-09-01), Fushiki et al.
patent: 7-158536 (1995-06-01), None
patent: 10-54318 (1998-02-01), None
Ehara Hideharu
Okamoto Takashi
Tsukada Shinsaku
Crowell & Moring LLP
Gimie Mahmoud
Hitachi , Ltd.
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