Vehicle idle quality has become an increasing quality concern for automobile manufacturers because of its impact on customer satisfaction. As demand for better fuel economy increases, automobile manufacturers are continuously looking for any benefits from different driving conditions. One area is lowering the idle speed at both drive and neutral idles. This typically has adverse impact on vehicle idle quality for the two reasons. First, lowering the idle speed generally degrades the engine combustion stability, which typically increases the excitation forces (0.5th, 1.0th, 1.5th, etc combustion torques). Second, lowering idle speed will cause modal alignment issues (i.e. combustion and inertia forces align with Powertrain rigid body modes, body modes, etc.). NVH development engineers have been requesting for an easy and quick way to measure engine combustion stability, which can help them to understand the contributions to their idle quality issues from different factors and evaluate the count measures for the fixing.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Engine Idle Combustion Stability Evaluation Using Calibration Parameters


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2005 Noise and Vibration Conference and Exhibition ; 2005



    Publication date :

    2005-05-16




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Engine idle combustion stability evaluation using calibration parameters

    Teng,C. / Ford Motor,US | Automotive engineering | 2005


    Engine Idle Combustion Stability Evaluation Using Calibration Parameters

    Teng, C. / Society of Automotive Engineers | British Library Conference Proceedings | 2005



    Evaluation of Idle Combustion Stability Using Flywheel Acceleration

    Teng, C. / Society of Automotive Engineers | British Library Conference Proceedings | 2003


    Idle Combustion Stability Modeling

    Stout, Joseph L. | SAE Technical Papers | 2011