Catalyst deterioration recovery device

Details Catalyst deterioration recovery device Catalyst deterioration recovery device

1995-03-14

1997-04-22

Heyman, Leonard E.

Power plants

Internal combustion engine with treatment or handling of...

Having sensor or indicator of malfunction, unsafeness, or...

60285, F01N 320

Patent

active

056220480

ABSTRACT:
To restore the efficiency of a platinum catalyst used for engine exhaust purification that has temporarily deteriorated through oxidation, the stoichiometric air-fuel ratio, or an air-fuel ratio set to a richer value than the stoichiometric air-fuel ratio of the air-fuel mixture supplied to the engine, is applied. The engine running condition and a decrease of catalyst oxidation are detected, and a recovery treatment temperature depending on the degree of oxidation is set. An engine running condition range suited to performing recovery treatment is set based on this recovery treatment temperature. By determining whether or not the running condition is within this range and applying a recovery treatment air-fuel ratio, recovery treatment is performed only under conditions satisfying the recovery treatment temperature. Recovery treatment is therefore performed efficiently, while increase of fuel costs and worsening of exhaust gas composition due to recovery treatment at low temperature are kept to a minimum.

REFERENCES:
patent: 5398501 (1995-03-01), Leo et al.

Affiliated with

Also associated with

Rating

Catalyst deterioration recovery device 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 recovery device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Catalyst deterioration recovery device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-335822