HYDRAULIC CIRCUIT FOR CVT CONTROL

摘要

PROBLEM TO BE SOLVED: To provide a hydraulic circuit for CVT control which is resistant to disturbance and hydraulic fluctuations and capable of prompt shifting at the time of shifting-down with a simple structure. SOLUTION: This hydraulic circuit includes a second control valve which uses the pressure in a driven pulley cylinder 2 or the pressure following the cylinder as pilot pressure between a main pulley cylinder 1 and a control valve 6 for controlling the cylinder to control the flow rate of hydraulic fluid discharged from the main pulley cylinder 1 by the second control valve.