| 摘要 |
PURPOSE:To prevent speed change shock and speed change hunting by constituting a shift valve to have hysteresis width gradually widened at the time of low opening degrees of an accelerator. CONSTITUTION:When governor pressure which affects an oil chamber 274 is lower than a settled value, if throttle pressure which affects an oil chamber 266 is lower than a settled value, a sleeve 272 is positioned downward, if it is more than a settled value, the sleeve 272 is positioned upward. A spool 271 is sent down by the first hysteresis pressure which affects an oil chamber 277 formed by the throttle pressure that affects the force of a spring 273 and the areal difference by a land 271a and a land 271b, and by the second hysteresis pressure which affects an oil chamber 276 formed by the areal difference by a land 271b' and land 271c. |
