Control strategy for HCCI-CD combustion in a diesel engine using two fuel injection phases

A compression ignition engine comprising:

• a control system for processing data;
• one or more combustion chambers;
• and
• a fueling system for injecting fuel into the one or more combustion chambers;
• wherein the control system controls the fueling system using a result of the processing of certain data by the control system to select one of plural fueling modes for operating the engine such that a) when the result of the processing selects a first fueling mode, the engine is fueled during an engine cycle to create a substantially homogeneous air-fuel charge within one or more combustion chambers that is compressed to auto-ignition, with no more fuel being introduced after auto-ignition, and b) when the result of the processing selects a second fueling mode, the engine is fueled during an engine cycle to create a substantially homogeneous air-fuel charge within the one or more combustion chambers that is compressed to auto-ignition, after which more fuel is introduced to provide additional combustion.