Controlling gearshifting to prevent powertrain hunting

A method for controlling gearshifts of an automatic transmission includes preventing an upshift while the vehicle accelerates on an ascending grade, if predicted vehicle acceleration in a target gear is less than a reference vehicle acceleration in the target gear; accelerating the vehicle on the gr...

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Bibliographic Details
Main Authors PROBERT BRAD, RUSSELL JEREMY L, LAROCHE CORY B, WIETHE PHILIP J
Format Patent
LanguageEnglish
Published 07.10.2014
Subjects
BLASTING
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
ENGINEERING ELEMENTS AND UNITS
GEARING
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MECHANICAL ENGINEERING
PHYSICS
THERMAL INSULATION IN GENERAL
WEAPONS
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Summary:A method for controlling gearshifts of an automatic transmission includes preventing an upshift while the vehicle accelerates on an ascending grade, if predicted vehicle acceleration in a target gear is less than a reference vehicle acceleration in the target gear; accelerating the vehicle on the grade; and producing the upshift, if predicted vehicle acceleration in the target gear is greater than a reference vehicle acceleration.
Bibliography:Application Number: US201113285138