Catalyst monitoring using a hydrocarbon sensor

Details Catalyst monitoring using a hydrocarbon sensor Catalyst monitoring using a hydrocarbon sensor

1997-02-24

1998-10-20

Denion, Thomas E.

Power plants

Internal combustion engine with treatment or handling of...

Methods

60276, 60277, F01N 300

Patent

active

058229795

ABSTRACT:
A hydrocarbon sensor measures the tail pipe hydrocarbon concentration emitted by an internal combustion engine to determine whether a catalyst has deteriorated beyond a predetermined point with respect to reducing hydrocarbon emissions. Catalyst performance is measured following an engine cold start when hydrocarbons are emitted and compared to catalyst performance when operating temperature has been reached to determine catalyst efficiency.

REFERENCES:
patent: 5265417 (1993-11-01), Visser et al.
patent: 5452576 (1995-09-01), Hamburg et al.
patent: 5560200 (1996-10-01), Maus et al.
patent: 5675967 (1997-10-01), Ries-Mueller
patent: 5727383 (1998-03-01), Yamashita et al.

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