Automatic transmission

Details Automatic transmission Automatic transmission

2005-10-26

2008-05-27

Ridley, Richard W L (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

Reexamination Certificate

active

07377874

ABSTRACT:
The output rotation of an engine is transmitted to a drive member when a vehicle starts moving, and the drive member is connected to a carrier of a speed-increasing planetary gear via a start clutch. Upon engagement of the start clutch, the rotation of the drive member is accelerated by the speed-increasing planetary gear and then transmitted to an input shaft that is directly connected to a ring gear. Such rotation transmitted to the input shaft is shifted to a plurality of speeds and transmitted to an output shaft by using a plurality of friction engagement elements to selectively connect or fix elements of a single planetary gear set and a multiple planetary gear set that is connected to the output shaft.

REFERENCES:
patent: 4676123 (1987-06-01), Kubo et al.
patent: 5106352 (1992-04-01), Lepelletier
patent: 5542889 (1996-08-01), Pierce et al.
patent: 6689010 (2004-02-01), Usoro et al.
patent: 7083537 (2006-08-01), Knowles et al.
patent: A 4-219553 (1992-08-01), None

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