Strategy for Fueling a Diesel Engine by Selective Use of Fueling Maps to Provide Hcci, Hcci+Cd, and Cd Combustion Modes

摘要

A compression ignition engine ( 20 ) has a control system ( 26 ) for processing data, one or more combustion chambers ( 22 ), and fuel injectors ( 24 ) for injecting fuel into the chambers ( 22 ). The control system ( 26 ) controls fueling using a result of the processing of certain data, such as engine speed and engine load, to select one of three fueling modes (HCCI, HCCI+CD, CD) for operating the engine ( 20 ). When the result of the processing selects the HCCI mode, the engine ( 20 ) is fueled to cause homogeneous-charge compression-ignition (HCCI) combustion in all combustion chambers ( 22 ). When the result of the processing selects the HCCI+CD mode, the engine ( 20 ) is fueled to cause HCCI combustion in some chambers ( 22 ) and CD (conventional diesel) combustion in the remaining chambers ( 22 ). When the result of the processing selects the CD mode, the engine ( 22 ) is fueled to cause CD combustion in all chambers ( 22 ).