Patent ID: 8191358
Filing Date: 2012-06-05
Classification: F01N,F02D,Y02T

Abstract:
1. A regeneration method for a storage catalytic converter in an exhaust-gas purification system of an internal combustion engine, comprising the following steps: switching of the internal combustion engine from a standard operating mode with a lean exhaust gas to a regeneration mode with a rich exhaust gas, determination of a first adaption value based on a determined catalytic converter temperature after the switchover to the regeneration mode, controlling of the internal combustion engine during the regeneration mode based on the determined first adaption value, measurement of a nitrogen oxide concentration in the exhaust gas of the internal combustion engine after the controlling of the internal combustion engine based on the first adaption value, determination of a characteristic variable of a desorption peak of the measured nitrogen oxide concentration after the switchover to the regeneration mode, calculating a new adaption value as a function of the determined characteristic variable of the desorption peak, the new adaption value configured to minimize the characteristic variable of the desorption peak during a subsequent regeneration mode; and storing the calculated new adaption value for an initial use during the subsequent regeneration mode instead of the first adaption value.