| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an automatic transmission capable of improving its control stability, by accurately detecting a required rotating speed, while effectively restraining influence of centrifugal hydraulic pressure acting on a hydraulic servo. <P>SOLUTION: This automatic transmission has an usually decelerating gear 21 outputting rotation of an input shaft 17 by always reducing a speed, a succeeding gear of using its output rotation as input, clutches 82 and 83 between an output part 21c of the usually decelerating gear 21 and an input part of the succeeding gear, a piston 61 pressing its clutches, and the hydraulic servo 60 controlling its piston, and is provided by connecting a hub part 80 on the inner peripheral side of the clutch 82 to the output part 21c, and connecting a drum 89 on the outer peripheral side of the clutch 83 to the input part of the succeeding gear, and has a first rotation sensor 92 detecting output rotation of the usually decelerating gear 21 on the outer peripheral side of the drum 89, and is constituted so that the piston 61 and the hydraulic servo 60 are arranged in the hub part 80, and a detecting object part 77 of the first rotation sensor 92 is connected to the piston 61, and is extended to the outer peripheral side of the drum 89. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
