Multi-Speed Transmission

摘要

A transmission gearing arrangement has four simple planetary gear sets and six shift elements. The six shift elements are engaged in combinations of three to establish ten forward speed ratios and one reverse speed ratio. A four clutch module selectively couples an intermediate shaft to four different gearing elements. One shift element is a brake.

主权项

1. A transmission comprising:
a first gearing arrangement configured to selectively impose a proportional speed relationship between an input and a first shaft; a second gearing arrangement configured to fixedly impose a linear speed relationship among the input, a second shaft, and a third shaft; a third gearing arrangement configured to fixedly impose a linear speed relationship among a fourth shaft, an output, a fifth shaft, and the third shaft; first, second, and third clutches configured to selectively couple the first shaft to the the second shaft, the third shaft, and the fourth shaft; a fourth clutch configured to selectively couple the input to the fifth shaft; and a brake configured to selectively hold the fourth shaft against rotation.