Exhaust emission control apparatus for internal combustion...

Details Exhaust emission control apparatus for internal combustion... Exhaust emission control apparatus for internal combustion...

2005-11-29

2005-11-29

Denion, Thomas (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

Having sensor or indicator of malfunction, unsafeness, or...

C060S324000

Reexamination Certificate

active

06968677

ABSTRACT:
There is provided an exhaust emission control apparatus for an internal combustion engine, which includes a failure diagnostic device that fixes three parameters selected from the group consisting of the engine speed detected by an engine speed detecting device, the fuel quantity controlled by a fuel quantity control device, the ignition timing controlled by an ignition timing control device, and the intake air volume controlled by an intake air control device at respective predetermined values, and finds values of the remaining one parameter, and compares the values of the remaining one parameter with each other to determine whether an exhaust flow control apparatus has failed or not.

REFERENCES:
patent: 6109027 (2000-08-01), Schaefer
patent: 6182445 (2001-02-01), Yamazaki et al.
patent: 6273058 (2001-08-01), Wagner
patent: 6381952 (2002-05-01), Asanuma et al.
patent: 6711892 (2004-03-01), Tamura et al.
patent: 3-117611 (1991-05-01), None
patent: 4-183921 (1992-06-01), None

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