Patent ID: 6561158
Filing Date: 2003-05-13
Classification: F02B,F02D,F02P,Y02T

Abstract:
A method for enhanced response to operator torque demand in a spark ignited internal combustion engine, which has fuel injectors positioned to inject fuel directly into combustion chambers of the engine, the method comprising:operating the engine on stratified stoichiometry charge combustion (S.S.C.C.), during a predetermined engine operation, by performing a split injection for each engine cycle, and controlling spark timing according to a first ignition timing point; varying a period of time, which is required for advancing spark timing from the first ignition timing point to a second ignition timing point during switch from S.S.C.C. to H.C.C., with differing degrees of the operator torque demand; and operating the engine on H.C.C. by performing a single injection for each engine cycle after elapse of said period of time.