CYLINDER JUDGING DEVICE FOR INTERNAL COMBUSTION ENGINE

摘要

Provided on an output rotating shaft of an internal combustion engine is a rotating member for generating signals corresponding to predetermined cylinder groups and signals for identifying a particular cylinder group, and the particular cylinder group is identified on the basis of these signals. At the time of start-up of the internal combustion engine, a fuel cutting mode or steady and constant speed running, an amount of fuel injection at a particular cylinder in the particular cylinder group is made to be different from those at the other cylinders in the particular cylinder group at a group injection timing, which references a particular cylinder assumed on the basis of a result of identification of cylinder groups, and rotational fluctuation and the result of identification of cylinder groups at that time are used to judge the truth of the above assumption and judgement of strokes and phases of the respective cylinders is used to identify a cylinder. At this time, an amount of control relating to a rotational frequency is regulated with respect to the other cylinders.