| 摘要 |
PROBLEM TO BE SOLVED: To provide an engine valve control device inhibiting hunting of an actual rotation phase to a target phase. SOLUTION: This engine valve control device is applied to an engine valve control mechanism having a VVT (valve timing adjusting device), an OCV (control valve) that controls a flow of hydraulic oil supplied to the VVT, and an electromagnetic solenoid that controls an operation of the OCV according to a control Duty (control command value). The engine valve control device includes a control command value calculation means calculating the control Duty based on a holding Duty, which occurs when an actual phase does not change but is held, and a learning means S24 which if a deviation between the actual phase and the target phase steadily occurs, corrects the value of the holding Duty for storing and updating the value in accordance with a steady-state deviation which steadily occurs. If temperature of the hydraulic oil is low, the learning by the learning means S24 is prohibited even when the deviation is steadily occurring. COPYRIGHT: (C)2011,JPO&INPIT |
