IGNITION TIMING CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE

The invention relates to an ignition timing control apparatus for an internal combustion engine which includes an electronic control unit configured to i) perform determination as to whether knockinghas occurred in the engine; ii) update a first learning value and a second learning value such that the ignition timing is retarded when determining that knocking has occurred; and iii) derive, as a required ignition timing, a timing obtained by retarding a base ignition timing based on the first and second learning values. The electronic control unit is configured to update the second learning value within a range in which an update amount of the second learning value within a prescribed period set in advance does not exceed a prescribed amount, when updating the second learning value. 本发明涉及种用于内燃机的点火正时控制设备。用于内燃机的点火正时控制设备包括电子控制单元，该电子控制单元被构造成：i)执行关于是否在发动机中已经发生爆震的判定；ii)当判定出已经发生爆震时，更新第学习值和第二学习值，使得点火正时被延迟；并且iii)将通过基于第和第二学习值来延迟基础点火正时而获得的正时推导为要求点火正时。该电子控制单元被构造成当更新第二学习值时，在预先设定的规定期间内的第二学习值的更新量不超过规定量的范围内更新第二学习值。