Borgwarner Inc.

Susan M Stroope

Yogesh Mehta

Arun Narayanan

Kun Tao

A transfer case includes a primary shaft, a secondary shaft radially offset from the primary shaft, and a torque transfer mechanism. The primary shaft includes a central channel and an inclined fluid channel. The torque transfer mechanism is configured to selectively transfer torque from the primary shaft to the secondary shaft, and includes a primary sprocket coupled to the primary shaft for transferring torque to the secondary shaft. The inclined fluid channel is associated with the primary sprocket, and includes an outlet that axially overlaps the primary sprocket.

Transfer case with primary shaft having inclined fluid channels

In the present invention, an improved planetary gearset which reduces the amount of vibration transferred from the planetary gearset to a housing. The present invention is a new way to interface the ring gear of a planetary gearset with the housing by incorporating a series of lugs around the ring gear and adjusting the number of lugs and the size and the shape of the lugs. The distribution of these lugs affects the sound levels transferred from the planetary gearset. Additionally, multiple rows of lugs can also be strategically arranged on one ring gear to gain further noise and vibration improvement.

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Oxford, MI, United States of America

Susan M Stroope