Multi-speed transmission

摘要

A family of transmission gearing arrangements provides a plurality of forward speed ratios and one or more reverse speed ratios by selective engagement of shift elements in various combinations. An input and an output are provided. Three planetary gear sets are located at an offset position relative to the input axis and the output axis. Axis transfer gears are provided to transfer rotational energy from the input to one of the planetary gear sets, and from one of the planetary gear sets to the output.

主权项

1. A transmission comprising:
an input configured to rotate about an input axis; an output configured to rotate about an output axis; a third axis transfer gear fixed to the input; a fourth axis transfer gear configured to rotate about the output axis and in continuous meshing engagement with the third axis transfer gear; a second simple planetary gear set having a second sun gear, a second carrier, and a second ring gear fixedly coupled to the output; a third simple planetary gear set having a third sun gear, a third carrier, and a third ring gear fixedly coupled to the fourth axis transfer gear; a second shift element configured to selectively couple the second sun gear to the third carrier; a third shift element configured to selectively hold the third sun gear against rotation; a fourth shift element configured to selectively hold the second carrier against rotation; and a sixth shift element configured to selectively couple the second sun gear to the third sun gear.