Device for purifying exhaust gas of engine

Details Device for purifying exhaust gas of engine Device for purifying exhaust gas of engine

1998-05-22

2000-05-09

Denion, Thomas

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

60276, 60287, 60297, 60324, 60303, F01N 300

Patent

active

060587008

ABSTRACT:
A device for purifying the exhaust gas of an engine comprises a NO.sub.X absorbent arranged in the exhaust passage. The NO.sub.X absorbent absorbs NO.sub.X therein when the air-fuel ratio of the inflowing exhaust gas is lean, and releases the absorbed NO.sub.X therefrom when the oxygen concentration in the inflowing exhaust gas becomes lower. The NO.sub.X absorbent also absorbs SO.sub.X therein when the air-fuel ratio of the inflowing exhaust gas is lean, and releases the absorbed SO.sub.X therefrom when the oxygen concentration in the inflowing exhaust gas becomes lower, with the temperature of the NO.sub.X absorbent being higher than a SO.sub.X releasing temperature. The air-fuel ratio of the exhaust gas flowing to the NO.sub.X absorbent is made rich temporarily when the temperature of the NO.sub.X absorbent is higher than SO.sub.X releasing temperature and when the flow rate of the exhaust gas flowing through the NO.sub.X absorbent is lower than a predetermined flow rate, to release the absorbed SO.sub.X from the NO.sub.X absorbent.

REFERENCES:
patent: 5472673 (1995-12-01), Goto et al.
patent: 5473890 (1995-12-01), Takeshima et al.
patent: 5832722 (1998-11-01), Cullen et al.
patent: 5850735 (1998-12-01), Araki et al.

Affiliated with

Also associated with

Rating

Device for purifying exhaust gas of engine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Device for purifying exhaust gas of engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for purifying exhaust gas of engine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1053444