Toroidal type continuously variable transmission

Details Toroidal type continuously variable transmission Toroidal type continuously variable transmission

1997-09-12

1999-03-23

Herrman, Allan D.

Friction gear transmission systems or components

Fluid control

Of toroidal transmission

476 42, F16H 1538

Patent

active

058851852

ABSTRACT:
A first and a second power roller supported by trunnions are gripped between an input disc and an output disc disposed on an identical rotation axis. The gyration angles of the power rollers are varied by driving the trunnions in a direction perpendicular to the rotation axis by an oil pressure actuator. The oil pressure of the actuator is controlled based on a target gyration angle, and the gyration angle of the first power roller is fed back to the oil pressure control. Vibration of the first power roller due to external disturbance is prevented from affecting the second power roller via oil pressure control by making a force according to a displacement of the first power roller in the direction perpendicular to the rotation axis, act only on the trunnion supporting the first power roller.

REFERENCES:
patent: 4744032 (1988-05-01), Miyaura et al.
patent: 5542890 (1996-08-01), Nakano et al.
Nakano et al., "Dynamic Characteristics of Speed Ratio Control of the Halt Toroidal CVT for Passanger Cars", SAE Technical Paper Series No. 901761, 25-32 (1990).

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