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:
Oct. 05, 2010
Filed:
Apr. 21, 2008
Jeffrey E Shultz, Zionsville, IN (US);
Mark A. Rushing, Martinsville, IN (US);
Vickie M. Rushing, Legal Representative, Martinsville, IN (US);
John P. Kresse, Martinsville, IN (US);
Jeffrey E Shultz, Zionsville, IN (US);
Mark A. Rushing, Martinsville, IN (US);
Vickie M. Rushing, legal representative, Martinsville, IN (US);
John P. Kresse, Martinsville, IN (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
A method for controlling a transmission in a motor vehicle includes determining a temperature of a fluid in the transmission, determining whether the torque converter lockup clutch is applied, and determining an engine torque of the motor vehicle. Then, the torque converter lockup clutch is applied and the transmission is prohibited from up-shifting if the temperature of the fluid exceeds a threshold, the torque converter lockup clutch is not applied, and the engine torque exceeds a second threshold. Next, a tractive effort of the motor vehicle is determined and the torque converter lockup clutch is deactivated when the temperature of the fluid is less than a third threshold, the tractive effort is less than a fourth threshold, or the engine torque is less than the second threshold.