Valve timing control apparatus for internal combustion engine

Abstract

A valve timing control apparatus for an internal combustion engine is capable of ensuring good response within a control range, stability outside the control range, and durability without increasing the capacity of electric power for a drive circuit and an OCV coil. The valve timing control apparatus includes an intake vale , an exhaust valve , an engine operating condition detecting section ( ), a target valve timing calculating section , variable valve timing mechanisms , an actual valve timing detecting section ( ), a control amount calculating section for calculating a control amount based on target valve timing, actual valve timing and engine operating conditions, and an actual valve timing control section ( ) for outputting the control amount as an output control amount to the variable valve timing mechanisms. When the target valve timing is outside a prescribed control range, the control amount calculated by the control amount calculating section is not made as an output control amount supplied to the actual valve timing control section ( ).