Patent ID: 8745972
Filing Date: 2014-06-10
Classification: F01N,F02D

Abstract:
1. An exhaust purification system of an internal combustion engine which arranges in an engine exhaust passage an NO X catalyst device which stores NO X which is contained in exhaust gas when an air-fuel ratio of the inflowing exhaust gas is lean and which releases the stored NO X when the air-fuel ratio of the inflowing exhaust gas becomes a stoichiometric air-fuel ratio or rich and which uses SO X release control which raises a temperature of the NO X catalyst device to an SO X releasable temperature when an SO X amount which is stored in the NO X catalyst device exceeds a predetermined allowable amount and which makes the air-fuel ratio of the exhaust gas which flows into the NO X catalyst device a stoichiometric air-fuel ratio or rich so as to make the stored SO X be released, an exhaust purification system of an internal combustion engine characterized in that the NO the system uses the residual SO the system uses the SO corrects the calculated SO