POWER TRAIN FOR AUTOMATIC TRANSMISSION

摘要

PURPOSE: A power train of auto transmission is provided to reduce an entire length and a volume of the auto transmission. CONSTITUTION: A deceleration planet gear set outputs rotation of an input shaft(10) as deceleration rotation. A complex planet gear set selectively receives non-deceleration rotation and deceleration rotation from the input shaft and the deceleration planet gear set, and outputs multi stage transmission rotation to an output shaft(20). The complex planet gear set comprises a fourth actuating element, a fifth actuating element, a sixth actuating element, and a seventh actuating element(N7).