Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Plural elements selectively braked
Patent
1990-02-02
1992-06-09
Diehl, Dwight
Planetary gear transmission systems or components
With means to vary drive ratio or disconnect drive
Plural elements selectively braked
F16H 5710
Patent
active
051202840
ABSTRACT:
An automatic transmission wherein a gear train is constituted by three single pinion type planetary gear sets, provided with a first planetary gear set having a first sun gear, a first ring gear, and a first carrier holding pinion gears meshing with the first sun gear and the first ring gear, a second planetary gear set having a second sun gear, a second ring gear which is normally or selectively connected with the first carrier, and a second carrier holding pinion gears meshing with the second sun gear and the second ring gear, a third planetary gear set having a third sun gear normally or selectively connected to the second carrier, a third ring gear which is continuously connected with the first carrier, and a third carrier holding pinion gears meshing with the third sun gear and the third ring gear and connected to the output shaft, a first clutch means which selectively connects the input shaft and the first ring gear, a second clutch means which selectively connects the first sun gear and the second carrier, a third clutch means which selectively connects the input shaft and the first sun gear, a fourth clutch means which selectively connects the first sun gear and the second sun gear, a first brake means which selectively stops the rotation of at least the third sun gear among the second carrier and the third sun gear, a second brake means which selectively stops the rotation of the first sun gear, and a third brake means which selectively stops the rotation of the second sun gear, at least five forward speeds and one reverse speed being settable as transmission stages.
REFERENCES:
patent: 3811343 (1974-05-01), Mori et al.
patent: 3863524 (1975-02-01), Mori et al.
patent: 4233861 (1980-11-01), Gaus et al.
patent: 4660439 (1987-04-01), Hiraiwa
patent: 4774856 (1988-10-01), Hiraiwa
patent: 4939955 (1990-07-01), Sagano
patent: 4963124 (1990-10-01), Takahashi et al.
Diehl Dwight
Toyota Jidosha & Kabushiki Kaisha
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