SYSTEM AND METHOD FOR SELECTING A TRANSMISSION GEAR RATIO
An automatic transmission control system includes a shift map that includes predetermined ranges of vehicle speeds at which vehicle engine speeds require gear shifts for the automatic transmission based on requests for torque. The predetermined ranges include upper bounds that correspond to gear ups...
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Main Authors | , , |
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Format | Patent |
Language | English |
Published |
27.11.2008
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Subjects | |
Online Access | Get full text |
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Summary: | An automatic transmission control system includes a shift map that includes predetermined ranges of vehicle speeds at which vehicle engine speeds require gear shifts for the automatic transmission based on requests for torque. The predetermined ranges include upper bounds that correspond to gear upshifts and lower bounds that correspond to gear down shifts. A shift map control module varies at least one of the predetermined ranges of vehicle speeds based on at least one vehicle condition that affects movement of the vehicle. |
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Bibliography: | Application Number: US20070753782 |