Controlling GCAI (Gasoline Controlled Auto Ignition) in an Extended Operating Map

The gasoline controlled autoignition (GCAI) is a modern combustion method with which the fuel consumption and the pollutant emissions can be reduced. The major drawback of the combustion method is the limited operating map. In this contribution it is shown how the operating map can be extended towards lower loads by the use of a spark plug for a spark-assisted GCAI combustion. Compared to the GCAI combustion, the spark plug is used additionally and the controller has to be adapted, such that the spark-assisted GCAI combustion is also considered. As controller a model-based predictive controller (MPC) is developed. In this contribution a special focus is set on the investigation of the underlying model for the MPC.