Power plants – Internal combustion engine with treatment or handling of... – Having sensor or indicator of malfunction – unsafeness – or...
Reexamination Certificate
2007-01-09
2007-01-09
Tran, Binh Q. (Department: 3748)
Power plants
Internal combustion engine with treatment or handling of...
Having sensor or indicator of malfunction, unsafeness, or...
C060S274000, C060S276000, C060S285000, C123S443000
Reexamination Certificate
active
11010353
ABSTRACT:
An apparatus for detecting deterioration of a catalyst in an internal combustion engine initially biases an air/fuel ratio of an air-fuel mixture supplied to the internal combustion engine to a rich amount so that an amount of oxygen stored in the catalyst is substantially zero. Then, the apparatus detects deterioration of the catalyst by alternating the air/fuel ratio lean or rich based on an amount of oxygen given to the catalyst. If the catalyst has deteriorated, a bias amount of the air/fuel ratio is set so that the amount of oxygen stored in the catalyst is substantially saturated. If the catalyst is normal, a bias amount of the air/fuel ratio is set so that the amount of oxygen stored in the catalyst is not saturated.
REFERENCES:
patent: 5515826 (1996-05-01), Hamburg et al.
patent: 5656765 (1997-08-01), Gray
patent: 5713199 (1998-02-01), Takeshima et al.
patent: 6487849 (2002-12-01), Bidner et al.
patent: 6567738 (2003-05-01), Gopp et al.
patent: 6594989 (2003-07-01), Hepburn et al.
patent: 6668813 (2003-12-01), Azuma et al.
patent: 2002/0157379 (2002-10-01), Kakuyama et al.
patent: A 6-81632 (1994-03-01), None
patent: A 2000-8838 (2000-01-01), None
patent: A 2002-130018 (2002-05-01), None
patent: A 2004-108187 (2004-04-01), None
Oliff & Berridg,e PLC
Toyota Jidosha & Kabushiki Kaisha
Tran Binh Q.
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