System for detecting deterioration of a three-way catalyst of an

Details System for detecting deterioration of a three-way catalyst of an System for detecting deterioration of a three-way catalyst of an

1991-05-15

1993-03-09

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

60277, F01N 328

Patent

active

051917629

ABSTRACT:
A system for detecting deterioration of a three-way catalyst of an internal combustion engine. Cutting-off of the fuel supply to the engine is started when the engine is decelerated with the throttle valve substantially fully closed, and the fuel supply to the engine is resumed when the rotational speed of the engine has become lower than a predetermined value. Time is measured which output from the air-fuel ratio sensor has required to reach a predetermined reference value after the resumption of the fuel supply to the engine. It is determined that the three-way catalyst is deteriorated when the time measured is shorter than a predetermined time period.

REFERENCES:
patent: 3939654 (1976-02-01), Creps
patent: 3969932 (1976-07-01), Rieger
patent: 4251989 (1981-02-01), Norimatsu
patent: 4622809 (1986-11-01), Abthoff
patent: 5018348 (1991-05-01), Durschmidt

Affiliated with

Also associated with

Rating

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

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-204159