| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a valve timing adjusting device achieving valve timing adjustment suited for the operation of an internal combustion engine. <P>SOLUTION: The valve timing adjusting device comprises an electric motor for generating cogging torque on a motor shaft, an energization control means for controlling the rotation of the motor shaft by applying electricity to the electric motor and for stopping the energization to the electric motor in connection with the stop of the internal combustion engine, and a phase change mechanism coupled to a crank shaft and a cam shaft for changing a relative phase between these shafts according to the rotation of the motor shaft. A peak value Tp of the cogging torque generated on the motor shaft is set to be larger than an absolute value of positive and negative torque acting on the motor shaft from the cam shaft through the phase change mechanism. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
