Internal combustion engine control apparatus

An internal combustion engine control apparatus comprising:

• a cylinder deactivation controller which activates or deactivates at least one cylinder of an internal combustion engine;
• a valve operating section which puts at least any one of an intake valve and an exhaust valve provided in the internal combustion engine into an operative condition or an inoperative condition on the basis of an request from the cylinder deactivation controller;
• an ignition controller which energizes an ignition coil provided in the internal combustion engine on the basis of a predetermined ignition timing and a predetermined energizing time period, to cause an ignition plug disposed on a combustion chamber of the internal combustion engine to discharge an ignition spark;
• a discharging time period calculation section which calculates an ignition discharging time period that is a dwell time period of the ignition discharge;
• a valve condition determination section which determines an operating condition of at least any one of the intake valve and the exhaust valve on the basis of the ignition discharging time period calculated by the discharging time period calculation section, wherein the ignition controller includes a first ignition controller which causes the ignition plug to discharge an ignition spark on the basis of the ignition timing when the cylinder deactivation controller issues no cylinder deactivation request and a second ignition controller which causes the ignition plug to discharge an ignition spark on the basis of the energizing time period when the cylinder deactivation controller issues a cylinder deactivation request.