Catalyst deterioration-detecting device for internal combustion

Details Catalyst deterioration-detecting device for internal combustion Catalyst deterioration-detecting device for internal combustion

1993-09-17

1994-10-25

Yeung, James C.

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

60285, 123691, F02D 4114

Patent

active

053577540

ABSTRACT:
A catalyst deterioration-detecting device for an internal combustion engine has at least one catalyst arranged in an exhaust passage of the engine,for purifying exhaust gases emitted from the engine, first and second exhaust component concentration sensors arranged in the exhaust passage upstream and downstream of the catalyst, respectively. The catalyst deterioration-detecting device calculates an average value of an output value from the second exhaust component concentration sensor, calculates an output fluctuation width with respect to the average value, based on the output value from the second exhaust component concentration sensor, and determines whether the catalyst is deteriorated, based on the calculated average value and the calculated output fluctuation width. The detection of the catalyst deterioration is carried out when the engine is in a predetermined operating condition defined by engine temperature, engine speed and engine load.

REFERENCES:
patent: 4007589 (1977-02-01), Neidhard
patent: 4251989 (1981-02-01), Norimatsu
patent: 4622809 (1986-11-01), Abthoff
patent: 4912926 (1990-04-01), Kumagai
patent: 5259189 (1993-11-01), Baier

Affiliated with

Also associated with

Rating

Catalyst deterioration-detecting device for internal combustion does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Catalyst deterioration-detecting device for internal combustion , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Catalyst deterioration-detecting device for internal combustion will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-127310