Multispeed automatic transmission for automobile vehicles

Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Plural elements selectively braked

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Details

475282, 475284, 475286, 475288, 475290, F16H 5710

Patent

active

051063522

ABSTRACT:
A multispeed automatic transmission for automobile vehicles having parallel input shaft output shaft includes two parallel gearsets and of constant-mesh gearwheels providing two fixed speed ratios. The second speed ratio is higher than the first speed ratio and in same direction. A first power path using the first fixed speed ratio includes a first control clutch and a second control clutch, and a second power path using the second fixed speed ratio includes a third control clutch. Further, the transmission includes a double planetary gearset, a first control brake and a second control brake. Alternatively, the input shaft and output shaft are in alignment and one of the two speed ratios is a direct drive. The transmission features six forward speeds, a braked neutral and a reverse drive.

REFERENCES:
patent: 3835732 (1974-09-01), Mori et al.
patent: 3863524 (1975-02-01), Mori et al.
patent: 4468982 (1984-09-01), Fujita
patent: 4638688 (1987-01-01), Hiraiwa
patent: 4653348 (1987-03-01), Hiraiwa
patent: 4660439 (1987-04-01), Hiraiwa
patent: 4934216 (1990-06-01), Sandel et al.
patent: 5007887 (1991-04-01), Asada

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