Device for evaluating catalyst performance deterioration

Details Device for evaluating catalyst performance deterioration Device for evaluating catalyst performance deterioration

1996-10-22

1998-03-03

Argenbright, Tony M.

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

60277, F01N 320

Patent

active

057222380

ABSTRACT:
A device for evaluating catalyst performance deterioration includes an air-fuel ratio sensor and a temperature sensor. The degree of catalyst performance deterioration per unit time is calculated based on the concentration of oxygen in the exhaust gas and the temperature of the catalyst. The deterioration of the catalyst is evaluated on the basis of the accumulated value of the degree of catalyst performance deterioration per unit time.

REFERENCES:
patent: 5341642 (1994-08-01), Kurihara et al.
patent: 5649420 (1997-07-01), Mukaihira et al.
"Patent Abstracts Of Japan", vol. 8, No. 1996, abstract of JP-8-93456, Aug. 1996.
"Patent Abstracts Of Japan", vol. 10, No. 1996, abstract of JP-8-158857, Oct. 1996.
"Patent Abstract Of Japan", vol. 18, No. 671 (M-1726), abstract of JP-6-264725, Dec. 1994.

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