Method for detection of performance reduction of exhaust gas pur

Details Method for detection of performance reduction of exhaust gas pur Method for detection of performance reduction of exhaust gas pur

1996-12-05

1998-10-06

Tsang, Cecilia J.

Chemistry: analytical and immunological testing

Measurement of electrical or magnetic property or thermal...

By means of a solid body in contact with a fluid

502334, 502261, 502262, 502332, 502 60, 4232135, 436147, B01J 2342, B01J 2108, B01J 2904, G01N 27416

Patent

active

058175210

ABSTRACT:
A method for detecting the performance reduction of an exhaust gas purification catalyst by examining the temperature of an exhaust gas flowing into the catalyst, necessary for the activation of the catalyst. This method enables accurate detection of the performance reduction of an exhaust gas purification catalyst without conducting a constant-speed vehicle operation for a long time.

REFERENCES:
patent: 5459997 (1995-10-01), Takemoto et al.
patent: 5497619 (1996-03-01), Yamada et al.
patent: 5571763 (1996-11-01), Takemoto et al.

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