Flow controller for power steering operating fluid

Abstract

Abstract PURPOSE:To improve the operating stability by containing a tubular control spool formed with restricting path integrally with a flow regulating spool valve while displacably in the housing and controlling the displacing motion in accordance with the temperature. CONSTITUTION:When the delivery oil from a pump to be driven by an engine is being fed to the feed path 15, a spool valve 17 will close the bypath 16 if the oil temperature is normal and the pump is rotating with low speed thereby the delivery oil will pass entirely through restricting holes 23, 24 and fed through a feed-out port 12 to the power steering system. Under high speed rotation, the spool valve 17 is slided to make the differential pressure across said holes 23, 24 constant thus to open the bypath 16 gradually. At the same time, the control 21 will go to the left this to restrict the open area of said hole 23 gradually but the viscosity of operating oil is high under low temperature to increase the differential pressure between the valve chamber 18 and said port 12 thus to move the control spool 21 to the right and to keep open the restricting hole 23.

Inventors

• 👤 Susumu Honaga
• 👤 進 穂永
• 👤 Eiju Fujiwara
• 👤 英寿 藤原

Bibliographic Details