Exhaust gas purification device for an engine

Details Exhaust gas purification device for an engine Exhaust gas purification device for an engine

1994-11-14

1995-12-05

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Waste gas purifier

422170, 422171, 60297, 60285, 4232391, 42324401, F01N 310, B01D 5334

Patent

active

054726735

ABSTRACT:
An engine comprising an exhaust passage having therein a NO.sub.x absorbent which absorbs the NO.sub.x when the air-fuel ratio of the exhaust gas flowing into the NO.sub.x absorbent is lean and releases the absorbed NO.sub.x when the air-fuel ratio of the exhaust gas flowing into the NO.sub.x absorbent becomes the stoichiometric air-fuel ratio or rich. A sulphur trapping device for trapping SO.sub.x contained in the exhaust gas is arranged in the exhaust passage upstream of the NO.sub.x absorbent.

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