OPERATIONAL METHOD OF AN INTERNAL COMBUSTION ENGINE COMPRISING AN AGR CATALYTIC CONVERTER WHEN CHANGING BETWEEN THE HCCI -COMBUSTION METHOD AND THE COMBUSTION METHOD WITH SPARK IGNITION (SI)

摘要

The invention relates to an operational method for, in particular, a direct injection internal combustion chamber having a plurality of combustion chambers, in particular for a direct-injection spark ignition engine, for example, a motor vehicle with at least partial low NOx combustion (NAV) and several operational sub-methods in which at least a charge compression combustion (RZV) is carried out in an operational sub-method. A reactivity reduction of an exhaust gas recycled (32) in the respective combustion chamber by means of external exhaust gas recycling is carried out prior to said recycling at least in an operational sub-method with charge compression combustion (RZV). Said type of reaction reduction is possible due it an oxidation catalytic converter (36) which is arranged in the direction of the exhaust gas flow up stream of an exhaust gas guide cooler. Said type of operational stability of the respective operational sub-method increases due to said reactivity reduction.