| 摘要 |
PURPOSE:To cut off a communicating passage securely so as to maintain a small capacity operation, and to prevent a sudden rise of the torque by providing an electromagnetic valve at the downstream of a control valve in the communicating passage between a crankcase and a suction chamber. CONSTITUTION:At a communicating passage 16 between a crankcase 6 which houses an oscillating plate 50 installed to a rotary shaft 7, and a suction chamber 15, a valve chamber 18 is provided. And a control valve 19 to open and close the communicating passage 16 according to the suction air pressure is provided to the valve chamber 18, and thereby the pressure in the crankcase 6 is regulated so as to convert the inclination of the oscillating plate 50. In such a constitution, an electromagnetic valve 28 provided at the downstream of the control valve 19 is closed by an electromagnetic control device 38, at the same time when a compressor is started to operate, so as to cut off the communicating passage 16. And the escape of a coolant gas in the crankcase 6 to the suction chamber 15 is blocked, and the oscillating plate 50 is maintained at a small capacity angle. Consequently, the small capacity operation is maintained, and a sudden rise of the torque is prevented. |
