Patent ID: 6361283
Filing Date: 2002-03-26
Classification: F04B

Abstract:
A control valve for controlling the displacement of a variable displacement type compressor, wherein the compressor includes a crank chamber, a suction pressure zone, the inner pressure of which is suction pressure, a discharge pressure zone, the inner pressure of which is discharge pressure, a bleed passage for bleeding gas from the crank chamber to the suction pressure zone, and a supply passage for supplying gas from the discharge pressure zone to the crank chamber, the control valve comprising:a valve housing; an outlet valve portion located on the bleed passage to control the opening of the bleed passage; an inlet valve portion located on the supply passage to control the opening of the supply passage; a shaft-like transmission mechanism extending between the outlet valve portion and the inlet valve portion to connect the outlet valve portion to the inlet valve portion, wherein the transmission mechanism moves axially; and a through hole located in the inlet valve portion to receive a part of the transmission mechanism, wherein the through hole constitutes a part of the supply passage, and wherein a clearance is formed between the transmission mechanism and a surface that defines the through hole to constantly connect the discharge pressure zone to the crank chamber.