Device for determining the abnormal degree of deterioration of a

Details Device for determining the abnormal degree of deterioration of a Device for determining the abnormal degree of deterioration of a

1998-04-17

1999-11-09

Lopez, F. Daniel

Power plants

Internal combustion engine with treatment or handling of...

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

60286, 60276, F01N 300

Patent

active

059791616

ABSTRACT:
A device for determining the abnormal degree of deterioration of catalyst of a catalytic converter arranged in an internal combustion engine exhaust system is disclosed. The device comprises a purification ability grasping unit for grasping a current purification ability of the catalyst and a temperature sensor for grasping a current temperature of the catalyst. Therefore, a threshold of the purification ability which corresponds to the abnormal degree of deterioration of the catalyst is determined in accordance with the current temperature of the catalyst. An appraisal value is determined in accordance with a difference between the threshold and the current purification ability. It is determined that the degree of deterioration of the catalyst is abnormal when the integration value of the appraisal value exceeds a predetermined value.

REFERENCES:
patent: 5077970 (1992-01-01), Hamburg
patent: 5216882 (1993-06-01), Kuroda et al.
patent: 5386693 (1995-02-01), Orzel
patent: 5386695 (1995-02-01), Iwata et al.
patent: 5400592 (1995-03-01), Mukaihira et al.
patent: 5524433 (1996-06-01), Adamczyk, Jr. et al.
patent: 5531069 (1996-07-01), Katsuhiko
patent: 5591905 (1997-01-01), Fujimoto et al.
patent: 5647204 (1997-07-01), Atanasyan
Copending U.S. Patent application Ser. No. 09/062,449, filed Apr. 17, 1998.

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