| 摘要 |
PROBLEM TO BE SOLVED: To provide an internal combustion engine ignition control device capable of executing plug replacement at more appropriate replacement timing.SOLUTION: An ignition control device of an on-vehicle internal combustion engine 10 mounting therein an ignition plug 40 that includes counter electrodes 41 and 42, stores a load condition of the internal combustion engine 10 during driving of a vehicle, and calculates a required voltage necessary to generate spark discharge of the ignition plug 40 on the basis of a history of the stored load condition. The ignition control device determines the replacement timing of the ignition plug 40 on the basis of the calculated required voltage. That is, the ignition control device calculates a current electrode distance between the counter electrodes 41 and 42 in light of the history of the load condition, and calculates the required voltage on the basis of the calculated current electrode distance and an occasional operating state of the internal combustion engine 10. |
