This paper discusses various noise sources of cylinder head assembly and focuses on design options developed to reduce the cylinder head noise in a single cylinder, 110cc scooter engine. Various experimental procedures were used for identification and ranking of different noise sources. In case of air-cooled small engines, temperature effects are dominant and as a consequence certain noises stand out in hot condition causing severe noise discomfort. After identifying the reasons for abnormal cylinder head noise, countermeasure mechanisms for reducing unintended impacts of valve train/ rocker arm in the layout were developed. The side-effects due to introduction of these additional mechanisms are studied using performance metrics. It is essential to limit noise deterioration over time to increase customer satisfaction. Simulation cycles were developed to quantify the cylinder head noise deterioration using accelerated testing procedures. Targets have been revised based on engine noise deterioration study over many thousand kilometers. The proposed solutions were verified and found to be acceptable through NVH measurement and field trials.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Mechanical Noise Reduction of Valve Train System in Small SI Scooter Engines


    Additional title:

    Sae Technical Papers



    Conference:

    SAE 2016 World Congress and Exhibition ; 2016



    Publication date :

    2016-04-05




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Mechanical Noise Reduction of Valve Train System in Small SI Scooter Engines

    Balasubramanian, T. L. / Kesavan, Vigneshwara Raja / Lakshminarasimhan, V. et al. | British Library Conference Proceedings | 2016


    Investigations on valve train noise in multi-valve engines

    Kaiser,H.J. / Deges,R. / Schwarz,D. et al. | Automotive engineering | 1991


    Investigations on Valve Train Noise in Multi-Valve Engines

    Schwarz, D. / Kalser, H.-J. / Meyer, J. et al. | SAE Technical Papers | 1991


    Development of Low-Friction Pistons for Small Scooter Engines

    Suda, Naoyuki / Kubota, Shinya / Ninomiya, Yoshinari | SAE Technical Papers | 2022


    Development of Low-Friction Pistons for Small Scooter Engines

    Kubota, Shinya / Suda, Naoyuki / Ninomiya, Yoshinari | British Library Conference Proceedings | 2022