Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Plural elements selectively braked
Patent
1997-12-29
1999-10-19
Ta, Khoi Q.
Planetary gear transmission systems or components
With means to vary drive ratio or disconnect drive
Plural elements selectively braked
475279, 475286, F16H 300
Patent
active
059679352
ABSTRACT:
A powertrain which is used for a 5-speed automatic transmission. The powertrain includes a first compound planetary gearset and a second compound planetary gearset. The first compound planetary gearset comprises first and second simple planetary gearsets having first, second, third, and fourth operating elements, while the second compound planetary gearset comprises third and fourth simple planetary gearsets having fifth, sixth, seventh, and eighth operating elements. The sixth operating element being fixedly connected to the third operating element, and the seventh and eighth operating elements are variably connected to the fourth operating element. Clutches are disposed between the seventh and fourth operating elements, and between the eighth and fourth operating elements. A brake is interposed between at least one of the operating elements of the first and second compound planetary gearsets and a transmission housing.
REFERENCES:
patent: 4046031 (1977-09-01), Ott et al.
patent: 4070927 (1978-01-01), Polak
patent: 4683776 (1987-08-01), Klemen
patent: 4823641 (1989-04-01), Kuhn et al.
patent: 5643130 (1997-07-01), Park
Hyundai Motor Company
Ta Khoi Q.
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