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:
Dec. 14, 2021
Filed:
Nov. 16, 2018
Ford Global Technologies, Llc, Dearborn, MI (US);
Christopher John Teslak, Plymouth, MI (US);
Gregory Michael Pietron, Canton, MI (US);
Hongtei Eric Tseng, Canton, MI (US);
Yuji Fujii, Ann Arbor, MI (US);
Michael Glenn Fodor, Dearborn, MI (US);
Diana Yanakiev, Birmingham, MI (US);
Seung-Hoon Lee, Northville, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A control system and method for controlling a multiple gear ratio automatic transmission in a powertrain for an automatic transmission having pressure activated fiction torque elements to effect gear ratio upshifts. The friction torque elements are synchronously engaged and released during a torque phase of an upshift event as torque from a torque source is increased while allowing the off-going friction elements to slip, followed by an inertia phase during which torque from a torque source is modulated. A perceptible transmission output torque reduction during an upshift is avoided. Measured torque values are used during a torque phase of the upshift to correct an estimated oncoming friction element target torque so that transient torque disturbances at an oncoming clutch are avoided and torque transients at the output shaft are reduced.