Control apparatus for belt-type continuously variable...

Details Control apparatus for belt-type continuously variable... Control apparatus for belt-type continuously variable...

F - Mech Eng,Light,Heat,Weapons

16

H

F16H 7/02 (2006.01) F16H 61/662 (2006.01) F16H 61/12 (2006.01)

Patent

CA 2119037

A control apparatus for a belt-type continuously variable transmission having a drive pulley, a driven pulley, a V-belt trained around said drive and driven pulleys, a drive cylinder for varying a pulley width of said drive pulley, and a driven cylinder for varying a pulley width of said driven pulley, comprising: a pressure regulator valve for producing pulley control pressures to be supplied to said drive and driven cylinders; a shift valve for distributing said pulley control pressure to said drive and driven cylinders to regulate drive and driven cylinder pressures in said drive and driven cylinder for a speed ratio control; electric shift control means for operationally controlling said shift valve by means of an electric power; and means for allowing said electric shift control means to make pressures in both said drive cylinder and said driven cylinder equal with each other when said electric power is lost.

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