Planetary gearing for a dual clutch transmission

Details Planetary gearing for a dual clutch transmission Planetary gearing for a dual clutch transmission

2007-02-13

2007-02-13

Wright, Dirk (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

Reexamination Certificate

active

10896527

ABSTRACT:
A multiple speed transmission includes first and second input clutches driveably connected to an input, and a gear system that includes four planetary gear units, each gear unit including a sun gear, a ring gear, planet pinions meshing with the sun gear and ring gear, and a carrier rotatably supporting the planet pinions. A first coupler releasably engages the first input clutch alternately with the sun gear of the first gear unit and the ring gear of the first gear unit. A second coupler releasably engages the sun gear of the fourth gear unit alternately with the sun gear of the second gear unit and the carrier of the fourth gear unit. A third coupler releasably engages a ground member alternately with the ring gear of the fourth gear unit and the ring gear of the third gear unit. A fourth coupler releasably engages a ground member alternately with the sun gear of the second gear unit and the carrier of the second gear unit. The first and second input clutches and the four couplers are engaged in multiple combinations to establish forward speed ratios and a reverse speed ratio between the input and output.

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