Automatic transmission

Details Automatic transmission Automatic transmission

1990-03-15

1991-10-15

Herrmann, Allan D.

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

475280, 475281, F16H 5710

Patent

active

050570633

ABSTRACT:
A gear train for changing the rotational speed of an input shaft to transmit the resultant rotation to an output shaft consists of single pinion type first and second planetary gear sets and a double pinion type third planetary gear set. A sun gear of the first planetary gear set is normally or selectively connected to a carrier and a sun gear of the second planetary gear set, a carrier of the first planetary gear set is normally or selectively connected to a carrier of the third planetary gear set, the carrier of the second planetary gear set is normally or selectively connected to a sun gear of the third planetary gear set, a ring gear of the second planetary gear set is normally or selectively connected to a ring gear of the third planetary gear set, the input shaft is selectively connected to either one or both of the sun gear and the ring gear of the first planetary gear set, and the output shaft is connected to the sun gear of the third planetary gear set, whereby at least five forward speeds and one reverse are permitted to be set.

REFERENCES:
patent: 3385134 (1968-05-01), Crooks
patent: 3811343 (1974-05-01), Mori et al.
patent: 3863524 (1975-02-01), Mori et al.
patent: 3877320 (1975-04-01), Iijima
patent: 3899940 (1975-08-01), Iijima
patent: 3946624 (1976-03-01), Murakami et al.
patent: 4233861 (1980-11-01), Gaus et al.
patent: 4660439 (1987-04-01), Hiraiwa
patent: 4774856 (1988-10-01), Hiraiwa

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