Abstract: A variable-capacity compressor control valve that can efficiently cancel the influence of the refrigerant pressure acting on a main valve element and avoid increase in complexity of the structure and size of the control valve is provided. A pressure equalizing passage is provided which is adapted to guide a suction pressure Ps acting on the upper end of a main valve element to a Ps introduction chamber provided at the lower end of the main valve element so that the suction pressure Ps acts on the lower end of the main valve element. When an electromagnetic actuator or a solenoid portion thereof is not supplied with current i.e., when a valve orifice is fully open, the introduction of a pressure Pc in a crank chamber from Pc inlet/outlet ports into the Ps introduction chamber is stopped, and the suction pressure Ps is introduced into the Ps introduction chamber via the pressure equalizing passage so that the suction pressure Ps acts on the upper and lower ends of the main valve element.

Abstract: Provided is a variable-capacity compressor control valve that can cancel the influence of the refrigerant pressure acting on a main valve element without increasing the size of a valve body. A main valve element is provided with a suction pressure passage adapted to guide a suction pressure Ps acting on the upper end of the main valve element to a Ps introduction chamber provided at the lower end of the main valve element so that the suction pressure Ps acts on the lower end of the main valve element. A cross-sectional area Ab of a lower fit-inserted portion of the main valve element, an effective opening area Ac of a valve orifice, and a cross-sectional area Ad of an upper fit-inserted portion are equal to one another.

Abstract: A variable-capacity compressor control valve that can efficiently cancel the influence of the refrigerant pressure acting on a main valve element and avoid increase in complexity of the structure and size of the control valve is provided. A pressure equalizing passage is provided which is adapted to guide a pressure Pc in a crank chamber acting on the lower end of a main valve element to a pressure-sensitive chamber so that the pressure Pc in the crank chamber acts on the upper end of the main valve element. When an electromagnetic actuator or a solenoid portion thereof is not supplied with current i.e., when a valve orifice is fully open, the introduction of a suction pressure Ps from Ps inlet/outlet ports Ps inlet/outlet chamber into the pressure-sensitive chamber is stopped, and the pressure Pc in the crank chamber is introduced into the pressure-sensitive chamber via the pressure equalizing passage so that the pressure Pc in the crank chamber acts on the upper and lower ends of the main valve element.

Abstract: A variable displacement compressor control valve is provided, which can reduce a time required until a discharge capacity becomes large at a time of actuation of a compressor without reducing an operation efficiency of the compressor. An in-valve release passage for releasing a crank chamber pressure Pc to a suction chamber of the compressor through a Ps inlet/outlet port is provided, a sub valve element which opens and closes the in-valve release passage is provided, and under a situation in which a valve port is closed by a main valve element, two forces that are a force corresponding to a suction pressure Ps (contraction force of a bellows device) and a force corresponding to a differential pressure of the crank chamber pressure Pc and the suction pressure Ps act on the sub valve element in a direction to open the in-valve release passage.

Abstract: There is provided a control valve for a variable displacement compressor capable of directly connecting a plunger to a valve rod in a relatively easy way, and realizing an improvement in assemblability, reduction in costs, and the like. A connecting cylinder for directly connecting the plunger to the valve rod is provided. The valve rod is provided with a mushroom-like or flange-like part. The connecting cylinder is provided with an elastic locking piece which, by pushing the mushroom-like or flange-like part into the elastic locking piece, is pushed and opened outward in a radial direction so as for the mushroom-like or flange-like part to pass through the elastic locking piece, and which, after the passing of the mushroom-like or flange-like part, is restored to an original shape due to elasticity which the elastic locking piece has, and locks the mushroom-like or flange-like part.