Multiple-speed automatic transmission for an automotive vehicle

Details Multiple-speed automatic transmission for an automotive vehicle Multiple-speed automatic transmission for an automotive vehicle

1996-05-24

1997-12-02

Marmor, Charles A.

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

475280, 475284, 475285, 475286, 475287, F16H 362

Patent

active

056929889

ABSTRACT:
A kinematic arrangement of a multiple-speed automatic transmission for an automotive vehicle includes a simple planetary gear unit and a compound planetary gear unit, hydraulically actuated clutches and brakes applied and released selectively, and an overrunning clutch that produces a one-way drive connection between the carrier of the first gear unit and a nonrotating member such as the transmission casing. The simple planetary gear unit includes a sun gear, a ring gear surrounding the sun gear, a carrier, and a set of planet pinions in continuous meshing engagement with the sun gear and ring gear and rotatably supported on the carrier. The compound gear unit includes a sun gear, a ring gear surrounding the sun gear, a carrier, a first set of planet pinions in continuous driving engagement with the sun gear, and a second set of planet pinions in continuous engagement with the ring gear and the first set of planet pinions.

REFERENCES:
patent: 4483215 (1984-11-01), Ishimaru et al.
patent: 5007887 (1991-04-01), Asada
patent: 5141477 (1992-08-01), Oshidari
SAE 930676, "A New Approach to Finding Optimum Planetary Gear Trains for Automatic Transmissions ", Oshidari et al, Mar. 1-5, 1993.

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