Patent ID: 7373917

Claim:
A method for operating a hybrid vehicle with a drive train which comprises an internal combustion engine driven by diesel fuel and at least one electric driving machine, wherein the internal combustion engine is operated with an alternative diesel combustion method in at least one operating range of the vehicle and the electric driving machine is switched in, wherein the internal combustion engine is operated under alternative combustion in at least one operating range in an HCLI mode with substantially homogeneous mixture combustion and later fuel injection, with the fuel injection being started in a range of between approximately 50° to 5° of crank angle before the upper dead center of the compression phase, wherein the internal combustion engine is operated under alternative combustion in at least one operating range in an HPLI mode with low-temperature mixture combustion and even later injection than in the HCLI mode, with the fuel injection being started in a range of between 2° of crank angle before the upper dead center and approximately 20° of crank angle after the upper dead center of the compression phase, wherein the electric driving machine is switched in in at least one transient operating range and wherein the electric driving machine is cut off again once the internal combustion engine reaches a stationary operating point within the load range of the HCLI mode or the HPLI mode.