| 摘要 |
<p>PURPOSE:To allow fitting to be accurately detected by providing a spring the action of which is reverse in direction opposite to the clutch pressure acting on a spool, and thereby allowing said spring and its contact point to detect the completion of filling and a clutch engaging condition. CONSTITUTION:When a trigger command from a controller 6 is applied to a solenoid 16, the spool 15 of a pressure control valve 3 is moved to the left. This permits hydraulic pressure to be applied to the hydraulic chamber 27 of a flow rate detecting valve 4 so as to let the spool be also moved to the left for letting the pressure be applied to a clutch 1 through an orifice 30. And when the filling to a clutch back is completed, the difference in pressure before and behind the orifice 30 disappears, the spool 25 is moved to the right while the force of a spring 31 is also being imparted to the spool so as to let chute pressure be built up. This permits the spool to be moved furthermore to the right while a spring 32 is being overcome so as to let it come in contact with a detecting pin 35 while being damped by a spring 36 for letting a detected signal be outputted from a point (a). Chute pressure is decreased later on so as to let the spool 25 be parted from the detecting pin 35. However, when the clutch is in an engaging condition with clutch pressure increased due to an increase in command current, the spool is brought in contact again with the pin so that the detected signal is outputted.</p> |
