The Effect of Thermal Expansion in a Dry Clutch on Launch Control
A dry clutch model with thermal dynamics is added to a driveline model of a heavyduty
truck equipped with an automated manual transmission. The model captures driveline
oscillations and can be used to simulate how di erent clutch-control strategies a ect vehicle
performance, drivability and comfort. Parameters are estimated to t a heavy-duty truck and
the complete model is validated with respect to shue, speed trajectory, clutch torque and
clutch lock-up/break-apart behavior. The model shows good agreement with data. Furthermore
the model is used to study the e ect of thermal expansion in the clutch on launch control. It
is shown that the e ect of thermal expansion, even for moderate temperatures, is signi cant in
launch control applications.
Andreas Myklebust and Lars Eriksson
2013
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