The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 01, 2008
Filed:
Dec. 16, 2004
Yuji Fujii, Ann Arbor, MI (US);
Marvin Paul Kraska, Dearborn, MI (US);
Gregory Michael Pietron, Canton, MI (US);
William Emil Tobler, Willis, MI (US);
Walter Joseph Ortmann, Saline, MI (US);
Bradley Dean Riedle, Northville, MI (US);
Ronald Thomas Cowan, Rochester Hills, MI (US);
Davorin David Hrovat, Ann Arbor, MI (US);
Yuji Fujii, Ann Arbor, MI (US);
Marvin Paul Kraska, Dearborn, MI (US);
Gregory Michael Pietron, Canton, MI (US);
William Emil Tobler, Willis, MI (US);
Walter Joseph Ortmann, Saline, MI (US);
Bradley Dean Riedle, Northville, MI (US);
Ronald Thomas Cowan, Rochester Hills, MI (US);
Davorin David Hrovat, Ann Arbor, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A gear ratio shift control and control method controls gear ratio upshifts in a multiple-ratio transmission for an automotive vehicle. Pressure actuated friction elements establish torque flow paths in transmission gearing as they are selectively engaged and released. A net torque reduction at a transmission torque output shaft during an upshift event is reduced by increasing transmission input torque prior to the start of the inertia phase of the upshift event.