| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a driving power transmission system for reducing transmission of drag torque occurring in the case when temperature of lubricating oil is low. <P>SOLUTION: A micro-actuator 30 is installed so that the end of its outside perimeter is positioned further inside than the end of the inside perimeter of a clutch plate 13, and a laminated film 32 is provided oppositely to the slide-contact face of either one of clutch plates 14. The micro-actuator 30 is made up of an annular substrate 31, and the thin laminated-film 32 formed on the substrate 31. Axial through holes are made in the substrate 31. A diaphragm is formed to each through-hole in the laminated film 32. The diaphragm becomes flat when temperature of the lubricating oil is high, and it axially swells when temperature of the lubricating oil is low. Thus, the inner clutch plate 14 is axially moved to widen the clearance. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
