System for detecting deterioration of catalyst in catalytic conv

Power plants – Internal combustion engine with treatment or handling of... – Having sensor or indicator of malfunction – unsafeness – or...

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F01N 328

Patent

active

050604732

ABSTRACT:
A system for detecting deterioration of a catalyst monitors temperature of catalyst. The system sets a temperature criterion which represents possible lowest temperature when the catalyst is in a normal condition. Abnormality of the catalyst is detected by detecting the catalyst temperature lower than the temperature criterion.

REFERENCES:
patent: 3969932 (1976-07-01), Rieger
patent: 4656829 (1987-04-01), Creps
patent: 4729220 (1988-03-01), Terasaka

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