Dual clutch transmission with multiple range gearing

Details Dual clutch transmission with multiple range gearing Dual clutch transmission with multiple range gearing

2007-02-05

2009-11-24

Lewis, Tisha D (Department: 3655)

Planetary gear transmission systems or components

Nonplanetary variable speed or direction transmission...

Nonplanetary transmission is friction gearing

C074S330000, C074S329000, C475S215000, C475S218000, C475S302000

Reexamination Certificate

active

07621839

ABSTRACT:
A vehicle powertrain comprising a multiple speed transmission with ratio range gearing is disclosed. The range gearing provides increased ratio coverage. A transition between a low speed range and a high speed range is achieved with no torque interruption whereby a gear ratio shift between the highest gear ratio in the low speed range and the lowest gear ratio in the high speed range occurs in a seamless fashion.

REFERENCES:
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patent: 4966048 (1990-10-01), Braun
patent: 6397994 (2002-06-01), Bowen
patent: 2006/0096414 (2006-05-01), Gochenour
patent: 2007/0220999 (2007-09-01), Hatori et al.
patent: 10260179 (2004-07-01), None
patent: 2412148 (2005-09-01), None
International Search Report for PCT/IB2008/000244 dated May 27, 2008.

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