As it is installed in the pulley flute width

摘要

PROBLEM TO BE SOLVED: To improve fuel consumption by reducing the consumption of operating oil for lubricating pressure in a hydraulic control device for a continuously variable transmission, and reducing the discharge oil quantity and mechanical loss of an oil pump.;SOLUTION: The continuously variable transmission has a primary pulley 15 and a secondary pulley 16 with a belt stretched between them. A primary cylinder 22 provided at the primary pulley 15 is provided with a driving oil chamber 23a and a balancing oil chamber 23b for eliminating centrifugal oil pressure generated in the driving oil chamber 23a. A secondary cylinder 27 provided at the secondary pulley 16 is provided with a driving oil chamber 28a and a balancing oil chamber 28b for eliminating centrifugal oil pressure generated in the driving oil chamber 28a. Operating oil from a cooling path 57 with an oil cooler 56 is supplied to the respective balancing oil chambers 23b, 28b through a balancing oil passage 59 to reduce the quantity of operating oil supplied to a lubricating pressure path 46.;COPYRIGHT: (C)2001,JPO