Control valve and hydraulic control device for continuously vari

Details Control valve and hydraulic control device for continuously vari Control valve and hydraulic control device for continuously vari

1997-10-03

1999-07-20

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

F15B 13042

Patent

active

059244500

ABSTRACT:
A control valve is shown for a continuously variable transmission, with a spool of the control valve being maintained at a fixed transmission ratio position between an up-shift position and a downshift position when a signal pressure supplied to the control valve falls within a certain range. The signal pressure is provided to the control valve through a pressure line that is divided, with one branch of the signal pressure line being connected to a first input port of the control valve and the other branch being connected to a second input port through an orifice. Application of a signal pressure within a certain range results in the drain port being selectively connected with the second input port.

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