Speed change gear mechanism of automatic transmission

Details Speed change gear mechanism of automatic transmission Speed change gear mechanism of automatic transmission

1997-07-08

1999-08-17

Wright, Dirk

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

F16H 366

Patent

active

059385596

ABSTRACT:
A speed change gear mechanism of an automatic transmission comprising first, second and third planetary gear units each including a sun gear, a ring gear, a single pinion meshed with both the sun gear and the ring gear and a pinion carrier for carrying the pinion. The pinion carrier of the first unit is united with the ring gear of the third unit. The ring gear of the second unit is united with the pinion carrier of the third unit. A first clutch is arranged between the ring gear of the first unit and the ring gear of the second unit. A second clutch or direct connecting member is arranged between the sun gear of the second unit and the sun gear of the third unit. A third clutch is arranged between the sun gear of the third unit and the pinion carrier of the third unit. A first brake is used for stopping rotation of the ring gear of the second unit and the pinion carrier of the third unit which are united. A second brake is used for stopping rotation of the sun gear of the first unit. A third brake is used for stopping the sun gear of the second unit. An input shaft is connected to the ring gear of the first unit to rotate therewith. An output shaft is connected to the pinion carrier of the second unit to rotate therewith.

REFERENCES:
patent: 3811343 (1974-05-01), Mori et al.
patent: 5083992 (1992-01-01), Asada
patent: 5098357 (1992-03-01), Asada et al.
patent: 5122103 (1992-06-01), Nakawaki et al.

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