Control system for an infinitely variable transmission

Details Control system for an infinitely variable transmission Control system for an infinitely variable transmission

1986-03-25

1988-06-21

Leppink, James A.

Endless belt power transmission systems or components

Pulley with belt-receiving groove formed by drive faces on...

Load responsive

74864, 74869, 474 28, 474 70, B60K 4116, F16H 1106

Patent

active

047522771

ABSTRACT:
A control system for an infinitely variable transmission has a transmission ratio control valve having a spool for controlling oil supplied to a cylinder of a drive pulley to change the transmission ratio. The transmission ratio control valve has chambers at both ends of the spool. By controlling the pressure of oil supplied to the chambers in accordance with engine operating conditions, the spool is shifted, so that the speed of changing the transmission ratio is controlled.

REFERENCES:
patent: 4369675 (1983-01-01), van Deursen
patent: 4480504 (1984-11-01), Oguma
patent: 4519790 (1985-05-01), Yamamuro et al.
patent: 4534243 (1985-08-01), Yokoyama et al.
patent: 4579021 (1986-04-01), Yamamuro et al.
patent: 4589071 (1986-05-01), Yamamuro et al.
patent: 4597308 (1986-07-01), Tanaka et al.
patent: 4657522 (1987-04-01), Miyawaki
patent: 4663991 (1987-05-01), Nakamura et al.

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