Patent ID: 11920549
Assignee: NISSAN MOTOR CO., LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 0:
1. An engine control method comprising:
preparing an engine having at least three cylinders;
calculating an ignition timing of each cylinder based on whether or not knocking is occurring;
setting, as a reference ignition timing, at least the ignition timing of a first cylinder of the at least three cylinders, for which the calculated ignition timing is (i) on an advanced angle side relative to a most retarded angle ignition timing_on a most retarded angle side and (ii) on a retarded angle side relative to a most advanced angle ignition timing on a most advanced angle side;
setting an allowable timing difference range that is a range of an allowable timing difference with reference to the reference ignition timing;
determining whether or not the ignition timing of each cylinder falls within the allowable timing difference range;
when determining that the ignition timing of a second cylinder of the at least three cylinders falls outside the allowable timing difference range, correcting the ignition timing of the second cylinder determined to fall outside the allowable timing difference range so that the timing difference of the ignition timing of the second cylinder with respect to the reference ignition timing falls within the allowable timing difference range; and
controlling an ignition timing of each cylinder of the at least three cylinders based on an operating condition.