Power plants – Internal combustion engine with treatment or handling of... – Having sensor or indicator of malfunction – unsafeness – or...
Patent
1995-07-17
1996-09-17
Hart, Douglas
Power plants
Internal combustion engine with treatment or handling of...
Having sensor or indicator of malfunction, unsafeness, or...
60284, 60300, 219202, 219497, F01N 328
Patent
active
055557252
ABSTRACT:
A control system controls an electrically heated catalyst for purifying exhaust gases emitted from an internal combustion engine. Voltage applied to the electrically heated catalyst and electric current flowing through the same are detected. A changeover is made between supply and interrupt of power to the electrically heated catalyst. A parameter indicative of an operative state of the electrically heated catalyst is calculated based on the detected voltage and the detected current, and the operative state of the electrically heated catalyst is detected based on the parameter. The changeover between the supply and interrupt of power to the electrically heated catalyst is controlled based the operative state of the electrically heated catalyst thus detected.
REFERENCES:
patent: 5163290 (1992-11-01), Kinnear
patent: 5257501 (1993-11-01), Wataya
patent: 5321231 (1994-06-01), Schmalzriedt
patent: 5388404 (1995-02-01), Tsumura
Aoki Takuya
Kato Hiroaki
Komatsuda Takashi
Shimasaki Yuichi
Hart Douglas
Honda Giken Kogyo Kabushiki Kaisha
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