Patent ID: 7131424

Claim:
A method of injecting fuel into the combustion chambers of an internal combustion engine having a plurality of cylinders, by a main injection process and a variable number of secondary injection processes assigned to the main injection process, all carried out during one working cycle of a piston, said method comprising the steps: for changing the number of secondary injection processes per associated main injection process, initiating the change in number of secondary injection processes only for some the cylinders ( 7 a – 7 d ), while maintaining the original number of secondary injection processes for the other of the cylinders ( 7 a – 7 d ), the changed number of secondary injection processes being effected initially for a small proportion of the cylinders ( 7 a – 7 d ) and then increasing the proportion of the cylinders ( 7 a – 7 d ) subjected to the changed number of injection processes.