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:
Jul. 09, 2013
Filed:
Nov. 11, 2011
John Andrew Byerly, Indianapolis, IN (US);
John P. Kresse, Martinsville, IN (US);
Mark A. Rains, Avon, IN (US);
Jeffrey K. Runde, Fishers, IN (US);
John Andrew Byerly, Indianapolis, IN (US);
John P. Kresse, Martinsville, IN (US);
Mark A. Rains, Avon, IN (US);
Jeffrey K. Runde, Fishers, IN (US);
Allison Transmission, Inc., Indianapolis, IN (US);
Abstract
A system and method for controlling double transition shifts in an automatic transmission having multiple gear sections. During a double transition shift, the system performs simultaneous closed loop control of the primary oncoming clutch in the primary gear section and the secondary off-going clutch of the secondary gear section. Before the input shaft of the secondary gear section is fully pulled down or the secondary off-going clutch becomes overheated, the system switches closed loop control of the input shaft to the secondary on-coming clutch of the secondary gear section. The system utilizes model-based calculations to determine the initial clutch pressure settings when a clutch enters closed loop control.