Method and apparatus to perform asynchronous shifts with oncoming slipping clutch torque for a hybrid powertrain system
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United States of America Patent
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Apr 9, 2013
Issued Date -
N/A
app pub date -
Oct 14, 2008
filing date -
Nov 4, 2007
priority date (Note) -
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Abstract
A method to control a powertrain including a transmission, an engine, and an electric machine includes monitoring a desired transmission shift including an oncoming clutch, monitoring operational parameters of the powertrain, monitoring a maximum electric machine torque capacity, determining a desired output torque profile through the desired transmission shift, determining a maximum electric machine torque capability profile through the desired transmission shift based upon the maximum electric machine torque capacity and the operational parameters, comparing the desired output torque profile to the maximum electric machine torque capability profile, determining a preferred oncoming clutch torque profile through the desired transmission shift based upon the comparing, and executing a clutch assisted shift based upon the preferred oncoming clutch torque profile.
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