JPS6415528A - Clutch controller - Google Patents

Abstract

PURPOSE:To enable quick connection corresponding to driving speed change operation by coupling an air tank through a solenoid gate valve with the operating chamber of a pneumatic actuator and inserting the solenoid gate valve into the way of a path coupling between the operating chambers of the pneumatic actuator and a control valve. CONSTITUTION:When a solenoid gate valve D1 is closed simultaneously with opening of a solenoid gate valve C1, pressurized air in an air tank 2 enters into the operating chamber 31 of an actuator 5 and pushes a rod 16 to the right together with a piston 15 so as to disengage a clutch. When solenoid valves C1, D1 are reset, air in the operating chamber 31 of the actuator 5 is discharged through the solenoid valve D1, operating chamber 22 of a control valve 30, path 34a of a valve body 34, an atmospheric chamber 21 and a bleezer 36 to the atmosphere. When hydraulic pressure in a hydraulic device 10 is released and the operation of the valve body 34 through a piston 20 is cancelled, the path 34a of the valve body 34 of the control valve is maintained in open state. When the solenoid valve D1 is opened intermittently, the piston 15 of the actuator 5 is returned quickly and the clutch is engaged corresponding to the speed change operation.