Power plants – Internal combustion engine with treatment or handling of... – Having sensor or indicator of malfunction – unsafeness – or...
Reexamination Certificate
2006-10-10
2006-10-10
Tran, Binh Q. (Department: 3748)
Power plants
Internal combustion engine with treatment or handling of...
Having sensor or indicator of malfunction, unsafeness, or...
C060S276000, C060S285000, C123S688000
Reexamination Certificate
active
07117664
ABSTRACT:
A diagnostic equipment for an exhaust gas cleaning apparatus installed for an engine, comprising a misfire detector which detects the misfire of the engine, and a secondary-air-system failure detector which detects the failure of a secondary air system. An index corrector corrects a deterioration index calculated by a deterioration-index calculator, in accordance with the detected result of the detector. A deterioration decision unit decides if the diagnostic equipment has failed, by the use of the corrected deterioration index. In a case where the extent of the misfire or the like is severe, a decision interrupter interrupts the decision of the deterioration decision unit. Thus, even when the misfire of the engine or the failure of the secondary air system has occurred, the detection of the deterioration of a catalyst does not err. It is therefore avoided to erroneously replace the catalyst which has not deteriorated yet, or to run the engine in spite of the deterioration of the catalyst.
REFERENCES:
patent: 5119631 (1992-06-01), Kayanuma
patent: 5134847 (1992-08-01), Ogawa
patent: 5158059 (1992-10-01), Kuroda
patent: 5331808 (1994-07-01), Koike
patent: 5341642 (1994-08-01), Kurihara et al.
patent: 5375416 (1994-12-01), Iwata
patent: 5386695 (1995-02-01), Iwata
patent: 5396766 (1995-03-01), Sato et al.
patent: 5437154 (1995-08-01), Sato et al.
patent: 5509268 (1996-04-01), Kuroda et al.
patent: 5743085 (1998-04-01), Takaku et al.
patent: 5921078 (1999-07-01), Takaku et al.
patent: 6089016 (2000-07-01), Takaku
patent: 6330795 (2001-12-01), Takaku et al.
patent: 6463735 (2002-10-01), Morinaga et al.
patent: 6745559 (2004-06-01), Schnaibel et al.
patent: 38 37 984 (1989-05-01), None
patent: 40 09 901 (1991-10-01), None
patent: 0 475 177 (1992-03-01), None
patent: 0 478 133 (1992-04-01), None
patent: 378941 (1981-08-01), None
patent: 63111256 (1988-05-01), None
patent: 2-91440 (1990-03-01), None
patent: 03078941 (1991-08-01), None
patent: 3-286160 (1991-12-01), None
patent: 03286160 (1991-12-01), None
patent: 4060133 (1992-02-01), None
patent: 04311649 (1992-11-01), None
patent: 05086955 (1993-04-01), None
patent: 5-171924 (1993-07-01), None
Copy of Japanese Office Action with English translation dated Jul. 3, 2001.
Ishii Toshio
Takaku Yutaka
Crowell & Moring LLP
Hitachi , Ltd.
Tran Binh Q.
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