Patent ID: 6227996
Filing Date: 2001-05-08
Classification: F16H

Abstract:
An oil pressure control device of a toroidal continuously variable transmission for a vehicle, said transmission comprising a toroidal unit, a hydraulic actuator driving said toroidal unit, said device comprising:a first valve and a second valve for operating said actuator;an arm which changes a rotation direction according to a running direction of said vehicle; anda change-over valve comprising a spool in contact with said arm, said change-over valve selectively connecting said first valve and said second valve to said actuator according to a rotational displacement of said arm;wherein said arm comprises an arc part in contact with said spool, andwherein a locus of the center of curvature of said arc part traced when said spool is displaced, intersects with a perpendicular line dropped from said rotation center of said arm that is perpendicular to a center axis of said spool.