An exhaust gas purification device for an engine.

摘要

An engine comprising an exhaust passage having therein a NOx absorbent which absorbs the NOx when the air-fuel ratio of the exhaust gas flowing into the NOx absorbent is lean and releases the absorbed NOx when the air-fuel ratio of the exhaust gas flowing into the NOx absorbent becomes the stoichiometric air-fuel ratio or rich. A sulphur trapping device for trapping SOx contained in the exhaust gas is arranged in the exhaust passage upstream of the NOx absorbent.