| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent wear and deformation of a sliding part owing to that an imposing angle of a driving rotating body and a driven rotating body is held in a given angle position for a long time. <P>SOLUTION: An imposing angle changing means 4 for changing both imposing angle is intervened between a driving ring 3 at a crankshaft side and a driven shaft member 7 at a cam shaft 1 side. The imposing angle changing means 4 is feedback-controlled corresponding to the operating condition of an internal combustion engine. In such a valve timing controller, when the imposing angle of the driving ring 3 and the driven shaft member 7 is held in a given angle position longer than a predetermined time within an accuracy where a feedback control of the imposing angle changing means 4 does not work, the imposing angle changing means 4 is finely operated within the range where the feedback control does not work. When a rotating speed of the internal combustion engine exceeds a predetermined speed, the changing means 4 is finely operated with such limitation that feedback control of the imposing angle changing means 4 does not work. <P>COPYRIGHT: (C)2004,JPO</p> |
