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

1988-03-08

Staab, Lawrence

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

74864, 74867, B60K 4112

Patent

active

047292644

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. 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 slidable spring retainer. By controlling the pressure of oil supplied to the end of the spool and the force of the spring in accordance with engine operating conditions, the line pressure is controlled.

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