Patent ID: 7944671

Claim:
A control apparatus of an electromagnetic drive valve operating mechanism that opens and closes a valve body used as an intake valve or an exhaust valve of an internal combustion engine through coordination of electromagnetic force and elastic force, comprising: a setting device that determines an opening valve timing and a closing valve timing based on a buffer height of a buffer mechanism of the valve body, the opening valve timing being a first timing at which the valve body reaches a first position at which the valve body starts to open, the closing valve timing being a second timing at which the valve body reaches a second position at which the valve body is substantially completed closing, wherein both the first valve timing and the second valve timing are distinct from a timing at which the valve body is in a fully closed position; and a calculating device that calculates a first predicted delay time based on the opening valve timing and a second predicted delay time based on the closing valve timing, the first predicted delay time being a first amount of time that is needed for the valve body to be displaced during an opening operation to a first target valve timing, the second predicted delay time being a second amount of time that is needed for the valve body to be displaced during a closing operation to a second target valve timing, wherein the electromagnetic drive valve operating mechanism is controlled based on the first predicted time delay and the second predicted time delay.