Exhaust gas purifying apparatus and method for internal combusti

Details Exhaust gas purifying apparatus and method for internal combusti Exhaust gas purifying apparatus and method for internal combusti

1994-03-17

1996-05-21

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Methods

60284, 60288, 60297, 60301, F01N 320

Patent

active

055178200

ABSTRACT:
An apparatus is provided for purifying an exhaust gas discharged from an internal combustion engine, which comprises a first exhaust gas passage including a nitrogen oxide removing catalyst and a three way catalyst, a second exhaust gas passage including the three way catalyst, a gas flow regulator for selectively directing the exhaust gas to the first and second exhaust gas passages, and a control unit which directs the exhaust gas to the first exhaust gas passage (thereby passing exhaust gas first through the nitrogen oxide removing catalyst and thereafter through the three way catalyst) when the temperature of the nitrogen oxide removing catalyst is within a hydrocarbon adsorbing range of temperature thereof while the engine is warming up, and to the second exhaust gas passage (thereby passing the exhaust gas only through the three way catalyst) when the temperature of the nitrogen oxide removing catalyst exceeds the hydrocarbon adsorbing range of temperature thereof.

REFERENCES:
patent: 5051244 (1991-09-01), Dunne et al.
patent: 5315824 (1994-05-01), Takeshima
patent: 5331809 (1994-07-01), Takeshima
patent: 5365733 (1994-11-01), Takeshima

Affiliated with

Also associated with

Rating

Exhaust gas purifying apparatus and method for internal combusti does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Exhaust gas purifying apparatus and method for internal combusti, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exhaust gas purifying apparatus and method for internal combusti will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2030404