Automatic transmission for vehicles

Details Automatic transmission for vehicles Automatic transmission for vehicles

2008-06-20

2010-11-16

Wright, Dirk (Department: 3655)

Planetary gear transmission systems or components

Nonplanetary variable speed or direction transmission...

Interrelated control of in series transmissions

Reexamination Certificate

active

07833120

ABSTRACT:
The present invention relates to an automatic transmission for vehicles, whose weight, length, and manufacturing cost are reduced as a consequence of simplifying a structure thereof by removing a torque converter. An automatic transmission for vehicles according to an exemplary embodiment of the present invention may include a first shift portion outputting two intermediate rotational speeds of a reduced rotational speed and a same rotational speed by using torque received through a first variable input pathway selectively connected to a first input shaft and an input pathway fixedly connected to the first input shaft, and a second shift portion including first, second, third, and fourth gears and a reverse gear that respectively achieve first, second, third, and fourth gear ratios and a reverse gear ratio, changing each intermediate rotational speed received from the first shift portion into five final rotational speeds, and outputting the same.

REFERENCES:
patent: 4200006 (1980-04-01), Ehrlinger et al.
patent: 6190280 (2001-02-01), Horsch
patent: 6845682 (2005-01-01), Bulgrien
patent: 6893373 (2005-05-01), Kawamoto et al.
patent: 7097584 (2006-08-01), Kuhstrebe
patent: 7344471 (2008-03-01), Sugino et al.
patent: 2005/0176547 (2005-08-01), DeFreitas
patent: 2009/0156349 (2009-06-01), Yang

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