Dynamic skip fire operation of a gasoline compression ignition engine

S Hashemi, MA Younkins, JE Kirwan - US Patent App. 15/282,308, 2017 - Google Patents
A gasoline compression ignition engine is operated in two modes. In a one mode of
operation the engine is operated with a firing fraction of one, corresponding to all of the
cylinders being active, working cylinders. In a second skip fire mode of operation a firing
fraction of less than one may be used under conditions, such as a low load condition, to
improve efficiency. The skip fire mode of operation may also be selected in part based on
other considerations, such as maintaining an exhaust temperature conducive for efficient …
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