Exhaust gas purification system for an internal combustion engin

Details Exhaust gas purification system for an internal combustion engin Exhaust gas purification system for an internal combustion engin

1993-05-07

1994-11-22

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Material from exhaust structure fed to engine intake

60288, 60301, 422171, F01N 328

Patent

active

053657330

ABSTRACT:
An exhaust gas purification system for an internal combustion engine includes a dual passage portion having a first passage and a second passage which are connected in parallel to each other. In the first passage, a first catalyst constructed of lean NOx catalyst is located and further a second catalyst constructed of oxidizing catalyst or three-way catalyst is located downstream of the first catalyst. In the second passage, a third catalyst constructed of oxidizing or three-way catalyst is located. A flow switching valve is provided so as to switch the flow of exhaust gas between the first passage and the second passage. The flow switching valve is switched so that exhaust gas flows through the third catalyst when the engine is being warmed-up and flows through the first catalyst and the second catalyst after the engine has been warmed-up.

REFERENCES:
patent: 4297328 (1981-10-01), Ritscher

Affiliated with

Also associated with

Rating

Exhaust gas purification system for an internal combustion engin 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 purification system for an internal combustion engin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exhaust gas purification system for an internal combustion engin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1983246