System for controlling the pressure of oil in a system for a con

Details System for controlling the pressure of oil in a system for a con System for controlling the pressure of oil in a system for a con

1986-06-27

1987-12-01

Novosad, Stephen J.

Endless belt power transmission systems or components

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

Fluid pressure actuator for adjustment of member

474 18, F16H 1104

Patent

active

047101512

ABSTRACT:
A control system for a continuously variable transmission has a line pressure control valve having ports and a spool for controlling the line pressure of oil supplied to a cylinder of a drive pulley. A hydraulic circuit is provided for supplying oil to a port of the line pressure control valve so as to shift the spool. A pressure reducing valve is provided in the hydraulic circuit for keeping the pressure in the circuit constant and a control valve is provided in the hydraulic circuit so as to control the quantity of the constant pressure oil supplied to the end of the spool.

REFERENCES:
patent: 4369675 (1983-01-01), Van Deursen
patent: 4459879 (1984-07-01), Miki et al.
patent: 4534243 (1985-08-01), Yokoyama et al.
patent: 4547178 (1985-10-01), Hayakawa et al.

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