Control for belt-type continuously-variable transmission

摘要

The apparatus has a shift control section to control an actual transmission ratio of a belt-drive continuously-variable transmission unit by controlling a shift control valve. A line pressure control section controls a line pressure to be supplied to the shift control valve and a pulley in accordance with an estimated input torque to the continuously-variable transmission unit. The shift control valve controls a fluid pressure to another pulley in the belt-drive continuously-variable transmission unit. The input torque estimating section estimates the input torque in accordance with a speed ratio and a torque ratio of a torque converter. An independent claim is also included for a belt drive continuously-variable transmission control method.