| 摘要 |
PURPOSE:To secure an optimum engage speed, by controlling a dropping speed of cylinder oil pressure with an oil quantity commensurate to a variation in an engine speed by a duty solenoid valve and another oil quantity to be fed via an orifice in combination, at clutch engagement. CONSTITUTION:A selector valve 63 is installed in a hydraulic circuit for a clutch release cylinder 15 of a friction clutch, and further a duty solenoid valve 70 is installed at the drain side when the cylinder 15 is pressed under exhaust by the selector valve 63 at clutch connection, while a circuit at the drain side is interconnected to a circuit at the oil feed side of the selector valve via an orifice. With this constitution, an oil pressure drop, namely, an engage speed is controllable in optimum conditions against a rising state of the engine speed so that the clutch engagement is smoothly performable all the time. |
