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:
Feb. 12, 2013
Filed:
Jul. 01, 2009
Paul R. Arlauskas, Saline, MI (US);
P. Brian Mcgrath, Manchester, MI (US);
Zhong LI, Novi, MI (US);
Chad Dalberg, Tipton, MI (US);
Iqbal A. Chowdhury, Ann Arbor, MI (US);
Jeremy Smith, Farmington, MI (US);
Paul R. Arlauskas, Saline, MI (US);
P. Brian McGrath, Manchester, MI (US);
Zhong Li, Novi, MI (US);
Chad Dalberg, Tipton, MI (US);
Iqbal A. Chowdhury, Ann Arbor, MI (US);
Jeremy Smith, Farmington, MI (US);
Chrysler Group LLC, Auburn Hills, MI (US);
Abstract
A method of controlling a vehicle powertrain having an automatic transmission coupled to an engine through a lock-up torque converter includes determining when a torque converter unlock is imminent during a deceleration fuel shut-off event, and delaying the resumption of fuel flow to the engine for a calibratable time period to reduce the likelihood of an undesirable increase in engine output torque when the torque converter has not fully transitioned to an unlocked state. The method also includes determining whether one or more breakout conditions exist that require enabling fuel flow to the engine and, perhaps, triggering an active unlocking of the lock-up torque converter.