Automatic transmission

Details Automatic transmission Automatic transmission

1987-12-01

1989-12-05

Diehl, Dwight G.

Machine element or mechanism

Gearing

Plural power paths to and/or from gearing

74606R, F16H 5710

Patent

active

048844721

ABSTRACT:
An automatic transmission having Ravigneaux Type planetary gear unit comprises a first and a second sun gear, a long pinion meshing the first sun gear, a short pinion meashing the long pinion and the second sun gear, a carrier supporting the long pinion and the short pinion and a ring gear meshing the long pinion;
the input shaft connects the second sun gear through a first clutch, and connects the first sun gear through a second clutch;
the output member is located in the center of the automatic transmission mechanism so that the output member encloses the input shaft;
in case of three speed transmission mechanism, a first clutch is located axially and extreme outside the transmission mechanism;
in case of four speed transmission mechanism a third clutch is located axially and outside the first clutch.

REFERENCES:
patent: 2953946 (1960-09-01), Simpson
patent: 3314307 (1967-04-01), Egbert
patent: 3701623 (1972-10-01), Mori et al.
patent: 4224837 (1980-09-01), Croswhite
patent: 4226123 (1980-10-01), Croswhite
patent: 4331044 (1982-05-01), Bookout et al.
patent: 4400998 (1983-08-01), Bookout et al.
patent: 4468982 (1984-09-01), Fujita
patent: 4602522 (1986-07-01), Dorpmund
patent: 4747323 (1988-05-01), Kiuchi et al.

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