METHOD TO DETERMINE THE INJECTION PATTERN IN THE INTAKE STROKE OF THE COMBUSTION CYCLE OF THE CYLINDERS OF A DIRECT-INJECTION INTERNAL COMBUSTION ENGINE

摘要

A method to determine the injection pattern in the intake stroke (INT) of the combustion cycle of the cylinders (2) of a direct-injection internal combustion engine (1), which includes determining the overall quantity (Q fuel_int ) of fuel to be injected for each combustion cycle of each cylinder (2) during the intake stroke (INT); determining the maximum quantity (QF max_int ) of fuel to be injected for each partial injection as a function of the value of the start of injection angle (SOI), of the speed (Vengine) and of the load (Lengine) of the internal combustion engine (1); and determining the number (i) of partial injections and the objective quantity (QF obj_int ) to be injected for each partial injection as a function of the quantity (Q fuel_int ) of fuel to be injected for each combustion cycle of each cylinder (2) during the intake stroke (INT) and of the maximum quantity (QF max_int ) of fuel to be injected for each partial injection.