Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Plural elements selectively braked
Patent
1990-12-10
1992-04-21
Diehl, Dwight
Planetary gear transmission systems or components
With means to vary drive ratio or disconnect drive
Plural elements selectively braked
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:
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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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