Control device for electrically-heated catalyzers

Details Control device for electrically-heated catalyzers Control device for electrically-heated catalyzers

1997-02-20

1998-10-13

Denion, Thomas E.

Power plants

Internal combustion engine with treatment or handling of...

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

60284, 60286, 60300, F01N 300

Patent

active

058195319

ABSTRACT:
A control device is provided for controlling an electrically-heated catalyzer of an internal combustion engine. Electric power generated by an alternator driven by the engine is supplied to the electrically-heated catalyzer. At least one electrical parameter dependent on the electric power supplied to the electrically-heated catalyzer is detected. It is determined that the electrically-heated catalyzer is abnormal when the at least one electrical parameter falls outside a predetermined range. The predetermined range is changed according to the rotational speed of the engine detected by an engine rotational speed sensor.

REFERENCES:
patent: 5553451 (1996-09-01), Harada
patent: 5555725 (1996-09-01), Shimasaki et al.
patent: 5600949 (1997-02-01), Kato et al.

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