Apparatus for determining deterioration of three-way catalyst of

Details Apparatus for determining deterioration of three-way catalyst of Apparatus for determining deterioration of three-way catalyst of

1991-11-15

1992-11-24

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

60277, 60285, 731181, F01N 320

Patent

active

051652307

ABSTRACT:
An apparatus for determining a deterioration of a condition of a three-way catalyst arranged in an exhaust passage of an internal combustion engine, comprising an upstream O.sub.2 sensor arranged in the exhaust passage upstream of the catalyst and a downstream O.sub.2 sensor arranged in the exhaust passage downstream of the catalyst. An air-fuel ratio feedback correction amount is calculated in accordance with the output of the upstream O.sub.2 sensor, and the rate of change of the air-fuel ratio feedback correction amount is decreased when it is determined that the condition of the catalyst has deteriorated.

REFERENCES:
patent: 3969932 (1976-07-01), Rieger
patent: 4251989 (1981-02-01), Norimatsu
patent: 4622809 (1986-11-01), Abthoff
patent: 4739614 (1988-04-01), Katsuno et al.
patent: 5077970 (1992-01-01), Hamburg
patent: 5088281 (1992-02-01), Izutani
patent: 5097700 (1992-03-01), Nakane

Affiliated with

Also associated with

Rating

Apparatus for determining deterioration of three-way catalyst of does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for determining deterioration of three-way catalyst of, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for determining deterioration of three-way catalyst of will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-915145