Four-speed automatic transmission

Details Four-speed automatic transmission Four-speed automatic transmission

1994-11-28

1996-12-31

Marmor, Charles A.

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

475277, 475279, F16H 362

Patent

active

055889298

ABSTRACT:
A four speed automatic transmission for a vehicle includes a transmission housing, an input member, an output member, three planetary gearsets for changing a ratio of torque between the input member and the output member, a plurality of clutch assemblies to selectively couple the input member to predetermined gears of the planetary gearsets, a plurality of brake assemblies to selectively couple predetermined gears of the planetary gearsets to the transmission housing, and a structure for allowing the output member and a planetary carrier from one of the planetary gearsets and an annulus gear of another of the planetary gearsets to rotate simultaneously.

REFERENCES:
patent: 3811343 (1974-05-01), Mori et al.
patent: 3956946 (1976-05-01), Murakami et al.
patent: 3987690 (1976-10-01), Murakami et al.
patent: 4027552 (1977-06-01), Murakami et al.
patent: 4875391 (1989-10-01), Leising et al.
patent: 4963124 (1990-10-01), Takahashi et al.
patent: 5188575 (1993-02-01), Leising et al.
Powerful Revolution: Three New V-8 Models Launch The BMW 5-Series For 1994; BMW of North America, Inc. Press Release.
BMW 540i In Which A Good Eight Replaces A Great Six In The Old Five; Car and Driver; By John Phillip; Sep. 1993; pp. 79-82.
See Serial No.: 08/271,313, Filed: Jul. 6, 1994.
See Serial No.: 08/190,958, Filed: Feb. 3, 1994.
See Serial No.: 08/271,314 -Filed: Jul. 6, 1994.

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