Patent ID: 6609493
Filing Date: 2003-08-26
Classification: F02B,F02D,Y02T

Abstract:
A system for enhanced combustion control in an internal combustion engine having at least one cylinder, a reciprocating piston within the cylinder to define a combustion chamber therein, comprising:a fuel supply system having a fuel injector positioned to directly inject fuel into the combustion chamber, the fuel supply system being capable of performing a split injection wherein a first fuel injection in each engine cycle precedes a second fuel injection that occurs during compression stroke in the same engine cycle; a spark plug positioned to produce a spark to ignite a first air/fuel mixture portion created due to the second fuel injection to initiate a first stage combustion, the first stage combustion elevating temperature and pressure high enough to cause auto-ignition of a second air/fuel mixture portion surrounding the first air-fuel mixture portion to initiate an auto-ignited second stage combustion; and an engine controller programmed to perform control over beginning time of the auto-ignited second stage combustion in response to at least one of the engine speed and engine load.