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. 18, 2017
Filed:
Mar. 25, 2015
Ford Global Technologies, Llc, Dearborn, MI (US);
Rohit Hippalgaonkar, Livonia, MI (US);
Eric Hongtei Tseng, Canton, MI (US);
Yuji Fujii, Ann Arbor, MI (US);
Gregory Michael Pietron, Canton, MI (US);
James William Loch McCallum, Ann Arbor, MI (US);
Jason Meyer, Canton, MI (US);
Michael John Leads, Farmington Hills, MI (US);
Joseph F. Kucharski, Livonia, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A method of operating a transmission includes measuring an output torque, estimating a gearbox input torque using a model, and estimating gearbox component torques based on a detailed gearbox model. The model used to estimate the input torque varies depending on whether a torque converter is locked, open, or slipping. In some operating conditions, multiple estimates are available for gearbox input torque, impeller torque, or shift element torque in which case the models are adapted. When an estimated component torque is outside an expected range, a warning flag is raised and diagnostic data is saved. When an estimated torque approaches or exceeds a torque limit, the input torque command may be reduced to prevent component damage. A warning flag may also be raised and diagnostic data saved in response to a model parameter being adapted to a value outside of a predetermined range.