Patent ID: 8195378

Claim:
A method, comprising: determining whether an aftertreatment regeneration is active; determining a combustion fuel amount for an internal combustion engine including one or more reciprocating pistons; injecting the combustion fuel amount within a combustion cycle such that over 50% of the combustion fuel amount is injected more than 10 degrees after top dead center (TDC) of the one or more reciprocating pistons in response to the aftertreatment regeneration being active; combusting the combustion fuel amount during the combustion cycle; wherein injecting the combustion fuel amount comprises performing a plurality of fuel injection events in the internal combustion engine, wherein each of the plurality of fuel injection events begin no later than 63 degrees after TDC; interpreting an engine load level, and in response to determining the engine load level is less than 40% of a maximum engine load level: performing a first fuel injection event before 10 degrees after TDC comprising less than 25% of the combustion fuel amount, performing a second fuel injection event after 10 degrees after TDC comprising between 15% and 65% of the combustion fuel amount, and performing a third fuel injection event after the second fuel injection event comprising between 10% and 85% of the combustion fuel amount.