US Patent 7913581 Dual clutch transmission with multiple range gearing

Patent 7913581 was granted and assigned to Eaton Corporation on March, 2011 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Eaton Corporation

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

79135810

Patent Inventor Names

Graeme A. Jackson0

Date of Patent

March 29, 2011

Patent Application Number

125758070

Date Filed

October 8, 2009

Patent Primary Examiner

‌

Tisha D Lewis

Patent abstract

A vehicle powertrain comprising dual torque input clutches and a multiple speed transmission with ratio range gearing is disclosed. The range gearing provides increased gear ratio coverage. A transition between a low speed ratio range and a high speed ratio range is achieved with no torque interruption. A shift from one gear ratio to an adjacent gear ratio in a speed ratio range during a shift sequence is preceded by preselecting the adjacent gear ratio.