| 摘要 |
<p>PURPOSE:To aim at improvement in discharge efficiency by making interconnection and interruption between a discharge chamber of a compressor and a control pressure chamber being partitioned off by a control piston varying an angle displacement position of a swash plate as well as between this control pressure chamber and a suction chamber of the compressor so as to perform each separately. CONSTITUTION:Plural actuating pistons 4 set up free of slide motion around a turning drive shaft 2 is connected to a swash plate 6 held by a holder 7 via a connecting rod 5. A tilt angle of this swash plate 6 is adjusted by a control piston 9 via a rod 31 or the like, whereby pump discharge is varied. I this case, there is provided with a control valve 50 consisting of a first valve mechanism 54, interconnecting and interrupting an interval between a control pressure chamber 8 to be partitioned off by the control piston 9 and a discharge chamber 40, and a second valve mechanism 55, interconnecting or interrupting an interval between the control pressure chamber 8 and a suction chamber 41. The first valve mechanism 54 is constituted so as to be opened when pressure in the suction chamber 41 is less than the first setting pressure, and the second valve mechanism 55 to be opened when pressure in the suction chamber 41 is more than the second setting press (> first setting pressure), respectively.</p> |
