| 摘要 |
PURPOSE:To prevent generation of a speed change shock, by providing a small sized hole in a spool of a cut back valve. CONSTITUTION:A cut back valve 12 provides in its land 52b a small sized hole 52d in a radial direction connecting an external contour part with a hole 52c, and the small sized hole 52d is used as an oil path. In this way, generation of a speed change shock can be prevented even when the cut back valve 12 is switched simultaneously with a 2-3 shift valve because the small sized hole 52d performs action simular to an orifice in one-way direction. |
