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

1987-11-24

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

74867, F16H 1104

Patent

active

047086947

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 driven pulley to change the line pressure. The line pressure control valve has chambers at opposite sides of the spool. A spring is provided between one end of the spool and a spring retainer. By draining the oil supplied to the end of the spool in accordance with engine operating conditions, the line pressure is controlled. The line pressure is at a maximum value, when the quantity of the draining oil is at a minimum value.

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

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