Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2007-03-06
2008-10-21
Gimie, Mahmoud (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S1980DA
Reexamination Certificate
active
07438052
ABSTRACT:
A device for determining abnormality of a fuel supply system, which is capable of determining abnormality of the fuel supply system including a fuel pressure sensor more accurately. A device for determining abnormality of a fuel supply system that has a fuel pressure sensor for detecting pressure of fuel in an accumulator as detected fuel pressure calculates a predetermined normal-time fuel pressure indicative of pressure fuel in the accumulator which is to be detected when the system is normal, according to a fuel flow rate relationship parameter indicative of a relationship between an inflow fuel amount parameter indicative of an amount of fuel flowing into the accumulator and an outflow fuel amount parameter indicative of an amount of fuel flowing out of the accumulator, and determines abnormality of the fuel supply system based on a result of comparison between the detected fuel pressure and the calculated normal-time fuel pressure.
REFERENCES:
patent: 5773716 (1998-06-01), Antonioli et al.
patent: 7143747 (2006-12-01), Uchiyama
patent: 2006/0054149 (2006-03-01), Uchiyama
patent: 2006/0213482 (2006-09-01), Shibagaki et al.
Awano Koichi
Izumiura Atsushi
Sato Daisuke
Arent & Fox LLP
Gimie Mahmoud
Honda Motor Co. Ltd.
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