| 摘要 |
A spool valve for changing transmission ratio for a toroidal type infinitely variable transmission is composed of, a valve housing tightly attached to a fixed member and leaving internal fluid passages, a spool is disposed in the housing and is slidable in an axial direction so as to confront with the various fluid passages to control the supply of pressurized fluid, and a cam follower made as a discrete member from the spool is disposed between the spool and a cam face to reduce the amount of displacement of the spool. The relative position of the spool with respect to the fluid passages is changed by a transmission ratio setting means to prevent the valve housing itself from displacing during the transmission ratio controlling operation.
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