A significant percentage of energy is lost in internal combustion engines due to valve train friction. The reduction of friction losses of a valve train is an important factor to improve significantly fuel efficiency and consequently emissions reduction. The friction loss of valve train includes the losses of the individual components and factors, such as spring load, temperature, lubricant type, mass of components, operating conditions and others. The breakdown of the friction within the valve train is necessary for the implementation of effective optimization measures.This paper presents an analysis of some influence factors associated to friction loss, utilizing the Design of Experiments approach. The results are based on dynamic measurements on a single overhead camshaft (OHC) engine valve train, performed on a test rig developed for friction torque measurements.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Friction Torque Measurement and Analysis of Influence Factors on Engine Valvetrain


    Additional title:

    Sae Technical Papers



    Conference:

    23rd SAE Brasil International Congress and Display ; 2014



    Publication date :

    2014-09-30




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Valvetrain Friction - Modeling, Analysis and Measurement of a High Performance Engine Valvetrain System

    Cacciatore, Diego / Calabretta, Michele / Carden, Phil | SAE Technical Papers | 2010


    Valvetrain friction reduced

    Yamaguchi,J. / Mazda Motor,JP | Automotive engineering | 1988



    Experimental investigation of the valvetrain friction in actual engine operation conditions

    Kang, S. / Kauh, S. K. / Ha, K. P. | British Library Online Contents | 2010