AUTOMATIC TRANSMISSION WITH TORQUE CONVERTER, A DNR GEAR GROUP, AND A CVT UNIT AND METHOD OF OPERATING THE SAME

摘要

The invention relates to an automatic transmission (2) for transmitting a mechanical power between a driving engine and a driven load, in particular for a vehicle with an internal combustion engine. The automatic transmission (2) is provided with a torque converter (10), with a shiftable DNR gear group (20) comprising a sun wheel (41), planet gears (42) and a ring gear (43), and with a Continuously Variable Transmission unit (30), in which each planet gear (42) of the DNR gear group (20) is in engagement with both the sun wheel (41) and the ring gear (43) thereof.