| THERMAL COMPENSATION CONTROL STRATEGY
IN AUTOMATED DRY CLUTCH ENGAGEMENT DYNAMICS
AND LAUNCH MANOEUVRE |
Mario Pisaturo
, Adolfo Senatore
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| University of Salerno |
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| ABSTRACT |
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Repeated engagements in dry clutch systems could yield remarkable increase of clutch disk temperature. In dry
clutch based transmissions like Automated Manual Transmissions and Dual Clutch Transmissions the overheating leads to
poor control of gearshift quality due to unpredictable and fast change of frictional characteristic. Even permanent damage of
clutch facings may occur. Under this light, this paper focusing on thermal effects to improve control performances and prevent
uncomfortable engagements. To this aim, detailed analyses of dry clutch architecture have been carried out to understand the
main phenomena which affect the clutch torque transmissibility. Moreover, a lumped thermal model has been developed to
predict both the disk surface and cushion spring temperature in real-time environment. To validate the proposed thermal
model, a non-linear least squares method has been used by comparing simulations with finite element results. A control
strategy based on model predictive control and thermal compensation effects has been proposed to simulate vehicle launch
manoeuvres in flat and up-hill road conditions with low and high initial clutch temperature as well. Finally, the proposed
control approach has been compared with classic PI control strategy to prove its effectiveness. |
| Key Words:
Dry-clutch, Friction coefficient, Temperature, Parameter estimation, Model predictive control, Thermal
compensation |
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Corresponding Author.
Mario Pisaturo , Email. 
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