Numeric Study on Torsional Characteristics of Dual Mass Flywheel with Circumferential ARC Spring 2019-01-0934

The rapid development of automotive technology has promoted the application of higher efficiency engines, while also putting higher requirements on the control of crankshaft torsional vibration. The traditional clutch driven disc torsional vibration damper can no longer meet the current new vibration and noise reduction requirements. Under these circumstances adopting dual mass flywheel (DMF) could be an efficient measure to reduce powertrain torsional fluctuations.

For the sake of studying the torsional characteristics of DMF, a dual mass flywheel with circumstance arc spring (DMF-CS) is taken as the research subject. Firstly, According to lumped mass model, a multi-degree of freedom torsional vibration model of DMF-CS is established, which takes the mutual conversion of dry friction and viscous friction into consideration. Then, the overall and partial torsion characteristics of dual mass flywheel are obtained through numerical analysis. The results show that the DMF-CS exhibits hysteresis nonlinear torsion characteristics because of damping force, its torsional stiffness and damping characteristics are affected by flywheel speed, transmitted torque, amplitude and frequency of the fluctuating torque. Besides, the heat generated by the hysteresis characteristic in a loop is also affected by the factors mentioned.