Power plants – Internal combustion engine with treatment or handling of... – Having sensor or indicator of malfunction – unsafeness – or...
Reexamination Certificate
2005-07-05
2005-07-05
Denion, Thomas (Department: 3748)
Power plants
Internal combustion engine with treatment or handling of...
Having sensor or indicator of malfunction, unsafeness, or...
C060S274000, C060S276000, C060S285000
Reexamination Certificate
active
06912842
ABSTRACT:
A more precise method for determining the oxygen storage capacity of an exhaust gas aftertreatment device is presented. The most accurate capacity estimate is obtained while the engine is idling or during low load operation. The capacity is determined by integrating the output of an oxygen sensor located downstream of the device during a period of time that it takes to store more than a predetermined amount of oxygen in the device. The overall LNT efficiency can then be inferred from its oxygen storage capacity. This method allows for improved emission control and fuel economy.
REFERENCES:
patent: 5267472 (1993-12-01), Schneider et al.
patent: 5351484 (1994-10-01), Wade
patent: 5602737 (1997-02-01), Sindano et al.
patent: 5713199 (1998-02-01), Takeshima et al.
patent: 5743084 (1998-04-01), Hepburn
patent: 5778666 (1998-07-01), Cullen et al.
patent: 5819530 (1998-10-01), Asano et al.
patent: 5832722 (1998-11-01), Cullen et al.
patent: 5894725 (1999-04-01), Cullen et al.
patent: 6125629 (2000-10-01), Patchett
patent: 6220018 (2001-04-01), Yamanashi et al.
patent: 6370869 (2002-04-01), Hirota et al.
patent: 6374596 (2002-04-01), Taga et al.
Bidner David Karl
Ingram Grant Alan
Surnilla Gopichandra
Denion Thomas
Ford Global Technologies Inc.
Lippa Allan J.
Tran Binh
Voutyras Julia
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