CONTINUOUSLY VARIABLE TRANSMISSION AND CONTROL METHOD THEREFOR

摘要

This continuously variable transmission is provided with: a variator; an auxiliary transmission mechanism; a target value setting means for setting a gear ratio corresponding to a select gear position as a target value of a through gear ratio, which is the overall gear ratio of the variator and the auxiliary transmission mechanism; a shift control means for performing a variator shift that downshifts the variator in such a manner that the through gear ratio reaches the target value, and a coordinated shift that upshifts the variator in such a manner as to maintain the through gear ratio while downshifting the auxiliary transmission mechanism immediately after the variator has been downshifted; and a torque increasing means for increasing torque inputted from a power source to the continuously variable transmission before a downshift command is assessed during coordinated shifting.