| 摘要 |
A valve timing adjustment device has an electric motor (4) where magnetic holding torque (Th) and motor torque (Tm), which is generated by electric current, are generated on a motor shaft (102), an electric current flow control system (6) as a control section that adjusts the motor torque (Tm) by controlling electric current flow to the electric motor (4), and a phase adjustment mechanism (8) that, while transmitting CAM torque (Tca), which alternately takes positive and negative directions according to rotation of a cam shaft, to the motor shaft (102), adjusts relative phases between a crankshaft and the cam shaft according to torque balance on the motor shaft (102). After an internal combustion engine is stopped, the electric current flow control system (6) fades the motor torque (Tm) that is balanced with magnetic holding torque (Th) and the cam torque (Tca) (S105). |
