Device for determining an abnormal degree of deterioration of a

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

1996-07-24

1999-11-23

Scheiner, Laurie

Measuring and testing

Simulating operating condition

Marine

731182, G01M 1900

Patent

active

059879777

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 ability value grasping means for grasping an ability value in relation with a current purification ability of the catalyst and varying amount grasping means for grasping a varying amount of the ability value grasped by the ability value grasping means. It is determined that the degree of deterioration of the catalyst is abnormal when the varying amount grasped by the varying amount grasping means is smaller than a predetermined value.

REFERENCES:
patent: 5303548 (1994-04-01), Shimizu et al.
patent: 5431011 (1995-07-01), Casarella et al.
patent: 5591905 (1997-01-01), Fujimoto et al.
Patent Abstracts of Japan, vol. 095, No. 004, May 31, 1995, Publication No. 07026944 dated Jan. 27, 1995.

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