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:
Aug. 02, 2016
Filed:
Jun. 04, 2014
Ford Global Technologies, Llc, Dearborn, MI (US);
Gregory M. Pietron, Canton, MI (US);
Kevin D. Macfarlane, Northville, MI (US);
Diana Yanakiev, Birmingham, MI (US);
Joseph F. Kucharski, Livonia, MI (US);
Bradley D. Riedle, Northville, MI (US);
Stephen M. Cicala, Dearborn Heights, MI (US);
Yuji Fujii, Ann Arbor, MI (US);
FORD GLOBAL TECHNOLOGIES, LLC, Dearborn, MI (US);
Abstract
A method of downshifting an automotive transmission. An on-coming transmission element is stroked while pressure for an off-going element is reduced. Pressure for the stroked on-coming element is increased to be sufficient to carry torque. Pressure for the off-going element is reduced below a torque transmitting amount once the stroked on-coming element has a sufficient torque carrying capacity. Torque capacities for the elements are determined from transmission output torque and acceleration and transmission input torque and acceleration. Feed forward or feedback terms for off-going and on-coming element torque capacities may be calculated using the transmission output torque, transmission input acceleration, and transmission input torque.