Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Plural elements selectively braked
Patent
1998-06-25
1999-11-09
Ta, Khoi Q.
Planetary gear transmission systems or components
With means to vary drive ratio or disconnect drive
Plural elements selectively braked
475279, 475278, F16H 362
Patent
active
059804181
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 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 acting as an output element, the fifth and sixth operating elements being variably connected to the second and first operating elements, respectively, and the eighth operating element being fixedly connected to the third operating element. Clutches are provided for variably connecting the fifth and sixth operating elements to the second and first operating elements, respectively. Brakes are provided for selectively connecting the first and seventh operating element to a transmission housing.
REFERENCES:
patent: 4046031 (1977-09-01), Ott et al.
patent: 4070927 (1978-01-01), Polak
patent: 4823641 (1989-04-01), Kuhn et al.
patent: 5643130 (1997-07-01), Park
Hyundai Motor Company
Ta Khoi Q.
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