A method and system for controlling internal combustion engine, such engine being adapted to operate in a selected one of a plurality of operating mode. One of such modes is characterized by stratified combustion and another one of such modes is characterized by a homogeneous combustion. The method and...http://www.google.com/patents/US6705276?utm_source=gb-gplus-sharePatent US6705276 - Combustion mode control for a direct injection spark ignition (DISI) internal combustion engine
