POWER SPLIT TRANSMISSION AND METHOD FOR CONTROLLING THE SAME

摘要

A power split transmission includes a first power branch having a continuously variable transmission and a separable second power branch. The two power branches are combined again in a summation gear and a device connects or disconnects the second branch when a synchronous condition is present when changing from an initial driving range into a target driving range. A control device for controlling and adjusting the transmission ratio of the first power branch is connected to the continuously variable transmission. A predicting device for predicting an efficiency &eegr;v of the first power branch in a target driving range is connected to the control device. The control device is set up such that the continuously variable transmission is adjusted when changing into the target driving range, considering the predicted efficiency &eegr;v, so that a difference in speed at the output of the first power branch due to a change in the flow of power in the first power branch is exactly compensated for by connecting or disconnecting the second power branch.