Power train for 7-speed automatic transmission for vehicles

Details Power train for 7-speed automatic transmission for vehicles Power train for 7-speed automatic transmission for vehicles

2007-08-21

2007-08-21

Le, David D. (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

C475S275000, C475S276000, C475S285000, C475S289000, C475S330000

Reexamination Certificate

active

11022230

ABSTRACT:
A power train of a 7-speed transmission for a vehicle is provided which comprises a first, a second, and a third single-pinion planetary gear set on an input shaft. A first ring gear and a second planetary carrier, a second ring gear and a third planetary carrier, a third ring gear and a first planetary carrier are respectively fixedly connected. A first brake selectively connects a first sun gear to a transmission case, a second sun gear is fixedly connected to the input shaft to operate always as an input element, and a third brake selectively connects a third sun gear to the transmission case.

REFERENCES:
patent: 6773370 (2004-08-01), Martyka et al.
patent: 6910986 (2005-06-01), Wittkopp
patent: 6913556 (2005-07-01), Armstrong et al.
patent: 6923742 (2005-08-01), Armstrong et al.
patent: 6958031 (2005-10-01), Diosi et al.
patent: 6997845 (2006-02-01), Tiesler et al.
patent: 7025703 (2006-04-01), Diosi et al.
patent: 2005/0143214 (2005-06-01), Shim
patent: 2005/0192150 (2005-09-01), Shim
patent: 2004-053010 (2004-02-01), None

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