Device for controling variable valve timing for internal combustion engine has device for setting feedback controler gain depending on determined engine operating state

摘要

The device has a demand advance angle setting device dependent on the engine operating state, a feedback controler for controling the valve timing to the demanded advance angle, a device (503) for detecting a stable or transition state and a device (504,505) for setting the feedback gain depending on the determined engine operating state. Independent claims are also included for the following: a method of controling variable valve timing in an internal combustion engine.