Geartrain for a five-speed automatic transmission

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

1998-06-17

1999-09-21

Wright, Dirk

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

F16H 300, F16H 3700

Patent

active

059546131

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

REFERENCES:
patent: 4683776 (1987-08-01), Klemen
patent: 5643130 (1997-07-01), Park

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