Powertrain for 5-speed automatic transmissions

Details Powertrain for 5-speed automatic transmissions Powertrain for 5-speed automatic transmissions

1998-06-18

1999-12-21

Wright, Dirk

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

475284, F16H 362

Patent

active

060042419

ABSTRACT:
A powertrain which is used for a 5-speed automatic transmission. The powertrain includes a first planetary gear unit and a second planetary gear unit. The first planetary gear unit comprises first and second simple planetary gearsets having first, second, third, and fourth operating elements, while the second planetary gear unit comprises a simple planetary gearsets having fifth, sixth, and seventh operating elements. The fifth operating element acts as an output element, one of the operating elements of the second planetary gear unit being fixedly connected to one of the operating elements of the first planetary gear unit, and the remaining two operating elements of the second planetary gear unit are variably connected to one operating element of the first planetary gear unit. Clutches are provided for variably connecting the two operating elements of the second planetary gear unit to the one operating element of the first planetary gear unit, and a brake is provided for selectively connecting at least one of the operating elements of the first and second planetary gear units to a transmission housing.

REFERENCES:
patent: 5098357 (1992-03-01), Asada et al.
patent: 5122103 (1992-06-01), Nakawaki et al.
patent: 5716298 (1998-02-01), Beim et al.

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