Method and apparatus for operating a continuously variable transmission in the torque limited region near zero output speed

摘要

An apparatus for controlling a continuously variable transmission includes an input shaft driven by an engine, an output shaft, an operator input for generating speed commands and a controller operable to receive the speed commands and generate transmission ratio commands which control a ratio of a speed of the output shaft to a speed of the input shaft. Torque of the output shaft is limited in a torque limited region near zero speed of the output shaft and the transmission ratio command is modified in the torque limited region.