Control of powertrain torsional vibration has always been important consideration to improve NVH performance of vehicle. Torsional couplings are used between engine flywheel and motor generator to isolate downstream driveline components from harmful and damaging torsional vibration. Low torsional stiffness of these coupling helps to isolate the torsional vibration during normal engine operation. But due to lower torsional stiffness, torsional mode of the coupling gets resonated during engine start and shutdown, which may result into coupling failures. Vehicle with engine auto start-stop feature is resulting into frequent engine starting event than traditionally observed, which results into more resonant cycles in coupling. The problem becomes more severe in hybrid electric vehicles where high inertia motor generator is directly coupled to engine. Traditionally damping has been used to control magnitude of torque peak at resonance. This study is focused on simulating transient torsional vibration to predict coupling resonance during engine start and shutdown for medium duty commercial hybrid electric vehicle. Sensitivity study has been done to understand impact of coupling torsional stiffness, driveline inertia and rate of combustion energy input on maximum dynamic torque in coupling. Torsional vibration measurement was conducted to calibrate the analytical model which was subsequently used for further design optimization. This paper presents the analysis methodology, coupling design optimization process and comparative result assessment.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Design Optimization of Torsional Coupling Through Transient Torsional Vibration Analysis


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    10TH SAE India International Mobility Conference ; 2022



    Publication date :

    2022-10-05




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Torsional Vibration

    Teng-Ko, Li | Emerald Group Publishing | 1938


    Dual torsional vibration damper optimization

    Hijawi,M. / Chrysler,US | Automotive engineering | 2012


    Dual Torsional Vibration Damper Optimization

    Hijawi, M. / Society of Automotive Engineers | British Library Conference Proceedings | 2012


    Dual Torsional Vibration Damper Optimization

    Hijawi, Mohammad | SAE Technical Papers | 2012


    TORSIONAL VIBRATION DAMPER

    SHIRAISHI YU / ISHIBASHI MASAYUKI / NISHIDA HIDEYUKI et al. | European Patent Office | 2022

    Free access