Patent ID: 6823666
Filing Date: 2004-11-30
Classification: F01N,F02D,Y02T

Abstract:
A process for heating a carbon filter in an exhaust gas system of a diesel engine having a plurality of catalytic converters mounted upstream in the direction of flow from a carbon filter for accumulation of soot,characterized in that the catalytic converter mounted downstream in the direction of flow and immediately upstream from the carbon filter is heated by transferring the exothermal reaction from a catalyst mounted upstream in the direction of flow, for initiation of detoxification of the downstream catalytic converter, to the downstream catalytic converter, and by introducing heat from the catalytic converter mounted downstream in the direction of flow and immediately upstream from the carbon filter into the carbon filter to the extent that combustion of the carbon is initiated, wherein a displacement is effected by &lgr; value regulation with an alternating rich-mixture/lean-mixture operating cycle of the internal combustion engine.