EXHAUST EMISSION CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To improve fuel economy and maintaining catalyst purification capacity by efficiently reducing a sulfur poisoning recovery treatment time or lowering a sulfur poisoning recovery treatable temperature in an exhaust emission control device having an exhaust purifying catalyst requiring the sulfur poisoning recovery treatment such as a NOx storage/reduction type catalyst.

SOLUTION: This exhaust emission control device of the internal combustion engine in which the exhaust purifying catalyst is disposed in an exhaust passage comprises a plasma injector having a plasma reforming part. The sulfur poisoning recovery treatment for the exhaust purifying catalyst is performed by adding active species formed by plasma-reforming at least either of a fuel and an air by a plasma injector beforehand to exhaust gases on the upstream side of the exhaust purifying catalyst.

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