| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve safety of an automatic transmission adopting a hydraulic controlling device, by suppressing hazardousness operating a reversing hydraulic clutch by mistake at forward running time. SOLUTION: A controlling hydraulic device for an automatic transmission, which is a controlling hydraulic device provided with a reversing hydraulic clutch 11 and a plurality of forward running hydraulic clutches 12 to 14 corresponding to a plurality of speed change ratios in a forward direction to control each hydraulic clutch 11 to 14 of the automatic transmission, has a first hydraulic switching part 1. In the first hydraulic switching part 1, relating to the reversing hydraulic clutch 11, prior to each forward hydraulic clutch 12 to 14, a plurality of the hydraulic clutches 11 to 14 are alternatively operated.</p> |
