Geartrain for a five-speed automatic transmission

Details Geartrain for a five-speed automatic transmission Geartrain for a five-speed automatic transmission

1997-12-29

1999-03-23

Wright, Dirk

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

475280, F16H 344

Patent

active

058851844

ABSTRACT:
A geartrain for a five-speed automatic transmission including first and second compound planetary gear units. The first compound planetary gear unit includes first and second simple planetary gearsets having first, second and third operating elements. The first operating element acting as an input element. The second compound planetary gear unit includes third and fourth simple planetary gearsets having fifth, sixth, seventh and eighth operating elements. The fifth operating element acts as an output element. The sixth operating element is variably connected to either the first operating element or the second operating element. The seventh operating element is fixedly connected to the fourth operating element. Clutches for variably connecting the sixth operating element to either the first operating element or the second operating element are provided. Brakes for selectively connecting the third and eighth operating element to a transmission housing are provided.

REFERENCES:
patent: 4027552 (1977-06-01), Murakami et al.
patent: 4088043 (1978-05-01), Johnson et al.
patent: 4143562 (1979-03-01), Murakami et al.
patent: 4531428 (1985-07-01), Windish
patent: 4683776 (1987-08-01), Klemen
patent: 4744267 (1988-05-01), Lepelletier
patent: 5246409 (1993-09-01), Flemming et al.

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