The way a powertrain is mounted plays an important role in improving vehicle noise and vibration caused by the engine firing forces and can be an effective role in improving vehicle ride comfort. This paper describes the basic concepts in powertrain mounting and derives a new concept of evaluating powertrain mounting. It is well known in publications that a decoupled powertrain mounting system has better NVH characteristics[3][4][6]. But how to relate percentage of decouple to powertrain mounts transmitted forces, what “decoupled” really means, and how to evaluate how much it is decoupled are still ambiguous to many engineers. The traditional “one coordinate system” kinetic energy fraction (KEF) index can't give a clear picture of how much the engine mounting is decoupled and is often misleading. The new concept focuses on the excitations acting on the powertrain system. The KEF index is simulated in global, engine and torque roll axis (TRA) coordinate systems, and the evaluation of decoupling is directed to a specific excitation. The global coordinate KEF index focuses on road and wheel excitation; the engine coordinate KEF index focuses on engine cylinder direction forces and corresponding torques excitation; and the TRA coordinate KEF index focuses on the crankshaft torque variation excitation which is critical for idle isolation.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Powertrain Mounting Design Principles to Achieve Optimum Vibration Isolation with Demonstration Tools


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2003 Noise & Vibration Conference and Exhibition ; 2003



    Publication date :

    2003-05-05




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Powertrain Mounting Design Principles to Achieve Optimum Vibration Isolation with Demonstration Tools

    Sui, J. S. / Hoppe, C. / Hirshey, J. et al. | British Library Conference Proceedings | 2003


    Powertrain mounting design principles to achieve optimum vibration isolation with demonstration tools

    Sui,J.S. / Hoppe,C. / Hirshey,J. et al. | Automotive engineering | 2003


    REDUCED POWERTRAIN VIBRATION MOUNTING SYSTEM

    SMITH TODD H / HICKS JOHN K / BRIDE MICHAEL A et al. | European Patent Office | 2016

    Free access

    Reduced powertrain vibration mounting system

    SMITH TODD H / HICKS JOHN K / BRIDE MICHAEL A et al. | European Patent Office | 2016

    Free access

    Driveline System Effects on Powertrain Mounting Optimization for Vibration Isolation under Actual Vehicle Conditions

    Sarna, Amit Kumar / Singh, Jitender / Kumar, Navin et al. | SAE Technical Papers | 2023