Invention Grant
- Patent Title: Controlling an automatic transmission
- Patent Title (中): 控制自动变速器
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Application No.: US14295470Application Date: 2014-06-04
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Publication No.: US09404571B2Publication Date: 2016-08-02
- Inventor: Gregory M. Pietron , Kevin D. Macfarlane , Diana Yanakiev , Joseph F. Kucharski , Bradley D. Riedle , Stephen M. Cicala , Yuji Fujii
- Applicant: FORD GLOBAL TECHNOLOGIES, LLC
- Applicant Address: US MI Dearborn
- Assignee: FORD GLOBAL TECHNOLOGIES, LLC
- Current Assignee: FORD GLOBAL TECHNOLOGIES, LLC
- Current Assignee Address: US MI Dearborn
- Agency: MacMillan, Sobanski & Todd, LLC
- Agent James Dottavio
- Main IPC: F16H61/04
- IPC: F16H61/04 ; F16H61/26 ; F16H61/00

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.
Public/Granted literature
- US20150354698A1 CONTROLLING AN AUTOMATIC TRANSMISSION Public/Granted day:2015-12-10
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