Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Plural elements selectively braked
Patent
1997-12-29
1999-08-31
Marmor, Charles A
Planetary gear transmission systems or components
With means to vary drive ratio or disconnect drive
Plural elements selectively braked
475286, 475290, 475319, F16H 362
Patent
active
059446293
ABSTRACT:
A geartrain for a five-speed automatic transmission includes a first compound planetary gear unit comprising first and second simple planetary gearsets having first, second and third operating elements, the first operating element acting as an input element and a second compound planetary gear unit comprising 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, and the eighth operating element is fixedly connected to the third 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 at least one of the operating elements of the first and second planetary gear units to a transmission housing are provided.
REFERENCES:
patent: 3941013 (1976-03-01), Miller
patent: 4090415 (1978-05-01), Gorrell et al.
patent: 5342257 (1994-08-01), Hotta et al.
Estremsky Sherry Lynn
Hyundai Motor Company
Marmor Charles A
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