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. 14, 1998
Filed:
Jun. 28, 1996
Steven R Fliearman, Howell, MI (US);
Kenneth J Potter, Almont, MI (US);
Dennis R Zeiger, Oak, MI (US);
Chrysler Corporation, Auburn Hills, MI (US);
Abstract
An anti-hunt transmission control strategy for controlling an automatic transmission so as to prevent the occurrence of a shift hunting condition. The control strategy determines a learned vehicle inertia as well as road load torque and expected torque in an upshift gear. A projected post shift acceleration is predicted based on the expected torque, road load torque and inertia of the vehicle. If vehicle speed and throttle position are within an allowable shift zone and if the predicted post shift acceleration exceeds a threshold value, the vehicle automatic transmission is allowed to upshift. Otherwise, should the predicted post shift acceleration not exceed the threshold value, an upshift is prevented.