The synergy between engine and clutch control in modern mechatronic transmissions as Automated Manual Transmission (AMT) and Dual Clutch Transmission (DCT) in passenger car aims at delivering power to the road during launch and gearshift transients in a way able to provide high riding quality. Engine and transmission control systems could provide ideal control of the three discontinuities of speed, torque and inertia variables during shifting of clutch only through the knowledge of the drivetrain dynamics and the frictional conjunction between its subparts. The simulations carried out in this paper aim at studying the excitation of drivetrain torsional vibration caused by frictional actions during the slip phase of the clutch engagement in automated manual transmissions. The results of this work substantiate the excitation of torsional motion in gear shifting operations in the characteristic frequency range of the "eek noise". Such outcomes underline the need to include the clutch cushion spring behavior in the simulation of all the phenomena induced by vibration originated at clutch level.
DRIVETRAIN VIBRATIONS EXCITED BY DRY CLUTCH IN AUTOMATED MANUAL TRANSMISSIONS
SENATORE, ADOLFO
2015-01-01
Abstract
The synergy between engine and clutch control in modern mechatronic transmissions as Automated Manual Transmission (AMT) and Dual Clutch Transmission (DCT) in passenger car aims at delivering power to the road during launch and gearshift transients in a way able to provide high riding quality. Engine and transmission control systems could provide ideal control of the three discontinuities of speed, torque and inertia variables during shifting of clutch only through the knowledge of the drivetrain dynamics and the frictional conjunction between its subparts. The simulations carried out in this paper aim at studying the excitation of drivetrain torsional vibration caused by frictional actions during the slip phase of the clutch engagement in automated manual transmissions. The results of this work substantiate the excitation of torsional motion in gear shifting operations in the characteristic frequency range of the "eek noise". Such outcomes underline the need to include the clutch cushion spring behavior in the simulation of all the phenomena induced by vibration originated at clutch level.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
