Method and system for controlling fuel injection timing to maintain desired peak cylinder pressure for high altitude operation

Abstract

An algorithm for use in an engine control module to control peak cylinder pressure in a diesel engine under high altitude operating conditions, including an initiation and entering routine configured to determine whether conditions are met for advancing a start of injection time used by the engine control module to cause an injection of fuel into a cylinder of the engine, an increment routine that is executed by the engine control module when the initiation and entering routine determines that the conditions are met to advance the start of injection time using a first increment when the first increment is less than or equal to an increment step and less than or equal to a second increment, and advance the start of injection time using the second increment when the first increment is greater than one of the increment step and the second increment, and an exiting routine that is executed by the engine control module when the initiation and entering routine determines that the conditions are not met to decrement the start of injection time when the first increment is less than or equal to a decrement step.