Method for operating a combustion engine having an exhaust-gas turbocharger

The present invention relates to a method for operating a combustion engine having an exhaust-gas turbocharger, in which it is possible to switch between normal operation and special operation, and at least one main fuel injection and at least one secondary fuel injection are provided in special operation. In a method for operating a combustion engine having an exhaust-gas turbocharger, it is possible to switch over between a normal operation and a special operation. In the special operation, at least one main fuel injection and at least one secondary fuel injection are provided. In response to a positive load jump, a switch-over between the normal operation and the special operation provided for increasing the exhaust gas enthalpy is performed, the secondary fuel injection in the special operation being adjusted so that it substantially burns in the combustion chamber and causes an increase in the exhaust gas enthalpy as well as an adjustment of a rich or a lean exhaust gas composition. The method according to the present invention may be used, for example, in a motor vehicle having a diesel engine.