Continuously variable speed transmission

Details Continuously variable speed transmission Continuously variable speed transmission

1992-01-31

1993-06-08

Bui, Thuy M.

Endless belt power transmission systems or components

Control for variable input to output speed-ratio

474 28, F16H 5900

Patent

active

052174123

ABSTRACT:
A continuously variable speed transmission wherein an input member is driven by an engine through a torque sensor and the input member drives an output member at a selected RPM through a pair of adjustable sheaves and an endless belt or chain which is trained over the sheaves. Each sheave has a fixed flange and an axially movable flange. The movable flanges can be shifted by hydraulic motors, and the pressure of fluid in such motors is determined by torque which is detected by the sensor as well as by the selected ratio of the transmission. The device which controls the pressure of fluid in the motors in dependency on the magnitude of torque and in dependency on the selected transmission ratio employs a pressure regulating valve which is connected with the torque sensor and with the motors and which is adjustable in automatic response to variations of transmission ratio.

REFERENCES:
patent: 4672864 (1987-06-01), Morimoto
patent: 4772249 (1988-09-01), Kouno et al.
patent: 4778435 (1988-10-01), Sugaya et al.
patent: 4867732 (1989-09-01), Soga et al.

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