Friction gear transmission systems or components – Fluid control – Of toroidal transmission
Reexamination Certificate
2007-12-04
2007-12-04
Joyce, William C. (Department: 3682)
Friction gear transmission systems or components
Fluid control
Of toroidal transmission
C476S040000
Reexamination Certificate
active
10631864
ABSTRACT:
A toroidal-type continuously variable transmission, has first and second disks respectively including inner surfaces; power rollers interposed for transmitting power; a pressing device for pressing the first disk toward the second disk; a main oil pressure control unit for non-electrically detecting the power for setting, as a target value, an oil pressure necessary for the pressing device when a transmission ratio between the first and second disks is a transmission ratio requiring a maximum pressing force, and increase the target value as the pressing force increases; an oil pressure correcting apparatus for electrically finding a necessary value of the oil pressure, the necessary value corresponding to the optimum value of pressing force generated by the pressing device, and also for introducing an oil pressure of a value into the pressing device, the oil pressure of the value being obtained by subtracting a correction value from the target value.
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Imanishi et al., “Development of POWERTOROS Unit Half-Toroidal CVT (2)”,NSK Technical Journal—Motion&Control, No. 10, pp. 1-8, Apr. 2001.
Imanishi Takashi
Inoue Eiji
Joyce William C.
NSK Ltd.
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