| 摘要 |
PURPOSE:To prevent a divergence of switching timing of two specified frictional connecting mechanisms by setting the pressure governing level of a pressure governor valve corresponding to a pressure drop of oil pressure supplied to one or the other frictional connecting mechanism. CONSTITUTION:A 2-3 control valve 102 is provided on a by-pass line 151 bypassing a one-way orifice 81 on a servo release line 126. The 3-4 clutch pressure in a 3-4 clutch line 121 is introduced into one end portion of a spool 102a, throttle modulator pressure is introduced into the central portion through a line 149 and a line 152, and a servo release pressure of downstream of a line 151 is introduced into the other end portion. The line 151 is opened or drained by the action of the 3-4 clutch pressure, the throttle modulator pressure and the servo release pressure, whereby the servo release pressure is governed corresponding to the 3-4 clutch pressure. |
