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Abstract



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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