Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2005-04-19
2005-04-19
Huynh, Hai (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S490000
Reexamination Certificate
active
06880530
ABSTRACT:
A fuel supply system detects the detects operating condition of an engine, calculates the width of the fuel injection pulse including valve-opening signal and holding signal based on the detected operating condition, and supplies valve-opening current to the solenoid located in the fuel injector based on the fuel injection pulse width and a holding current for holding the valve-opening condition after the valve-opening current has reached the predetermined current value. Current is supplied to the solenoid when the logical product of the valve-opening signal and the holding signal has been formed. The fuel supply system diagnoses an abnormality of the fuel injector when the time period from the start of the fuel injection pulse until the valve-opening current reaches the predetermined current value is shorter than the predetermined one.
REFERENCES:
patent: 4922878 (1990-05-01), Shinogle et al.
patent: 5941216 (1999-08-01), Arakawa
patent: 6173700 (2001-01-01), Yamashita et al.
patent: 6234150 (2001-05-01), Watanabe
patent: 6332455 (2001-12-01), Sumida et al.
patent: 6431155 (2002-08-01), Yamakado et al.
patent: 6453876 (2002-09-01), Fukutomi et al.
patent: 6532940 (2003-03-01), Ono et al.
patent: 6571773 (2003-06-01), Yamakado et al.
patent: 6684862 (2004-02-01), Oyama et al.
patent: 6712048 (2004-03-01), Aoki et al.
patent: 10015647 (2001-10-01), None
patent: 0309753 (1989-04-01), None
patent: 1408221 (2004-04-01), None
patent: H11-13519 (1999-01-01), None
patent: H11-82127 (1999-03-01), None
patent: 2002061534 (2002-02-01), None
patent: 124890 (2004-04-01), None
European Search Report mailed Feb. 6, 2004.
Oyama Katsuya
Sasaki Shoji
Crowell & Moring LLP
Hitachi , Ltd.
Huynh Hai
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