| 摘要 |
<p>[PROBLEMS] To keep a phase angle at a determined one after it is determined without consuming power. [MEANS FOR SOLVING PROBLEMS] In a process where an intermediate member (14) arranged movably on the outer circumference of an inner tube section (12) which is arranged to rotate relatively to an outer tube section (10) to which a driving force is transmitted from a crankshaft and coupled with a cam shaft moves in the axial direction as a solenoid (74) or a solenoid (76) is energized, balls (46, 48) move in directions opposite to each other in response to the axial displacement incident to the movement of the intermediate member (14), the phase between the outer tube section (10) and the cam shaft (2) is regulated variably, and, after the intermediate member (14) is set at a lead angle or lag angle position when the solenoids (74, 76) are not energized, movement of the balls (46, 48) is kept stopped on receiving torque input from the outer tube section (10) or the cam shaft (2) to bring about a self-lock state.</p> |
