Procedure for reducing the soot emission of a direct injection diesel engine

摘要

The invention concerns a procedure for controlling the combustion of a diesel engine with direct injection, which has a fuel injection system operated with an injection strategy specified in the field of identification, including at least the following steps:Execute at least one fuel main injection (HE); andExecute at least one first and second fuel after-injection (NE1, NE2) between which hydraulic distances are defined as the time interval of an injection and the start of a subsequent injection, where the hydraulic distances of a soot-reducing injection strategy are chosen so that:A close hydraulic distance (AhydHE/NE2) between at least one main injection (HE) and the subsequent subsequent subsequent subsequent injections (NE1, NE2) where the injection of the last main injection (HE) varies according to the speed (rpm) and torque (M), where the start of the second injection after injection (NE2) is always earlier than the 30th angle of the crank (KW) after the upper point of death (n.OT); andA close hydraulic distance (AhydNE1/NE2) between the injection start of the second post-injection (NE2) and the injection of the previous first post-injection (NE1) is chosen, which is between 600 m and 50-millimeter is lying.