Abstract A way to preserve the natural resources and lowering the pollution level is the improving of the thermal engine efficiency in order to reduce the fuel consumption. For this purpose, the authors propose a combined solution to improve the performances of the automotive engine. In order to improving the combustion efficiency, we tried to get a more close approach to ideal combustion cycle at constant volume, specific to the spark ignition engine, by developing an engine with sequentially variable compression ratio. Also, the theoretical and physical model developed allows the determination of a transversal new profile of the compression ring in order to obtain better lubrication conditions. By modifying the architecture of the compression ring the ware of friction is reduced, thereby increasing mechanical efficiency. Also, the paper present the results of an analysis concerning the main factors affecting the cam-follower contact conditions, emphasizing the lubrication regime influence on the wear of elements in contact. An original technical solution is proposed for the improvement of the lubrication regime, in order to avoid the starvation phenomenon. This theoretical and experimental study concerns the modification of some parameters of the internal combustion engine in various situations, aimed at optimizing a friendly environmental propulsion engine.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Optimized Automotive Spark Ignition Engine


    Contributors:


    Edition :

    1st ed. 2016


    Publication date :

    2015-11-26


    Size :

    14 pages




    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English




    An Optimized Spark Ignition Methanol Engine For Light Duty Vehicles

    Collins,D. / Mears,C.R. / Ricardo Consulting Engineers,GB | Automotive engineering | 1984


    Spark-ignition engine trends

    Jost,K. | Automotive engineering | 2002


    Tomorrow's Spark-Ignition Engine

    Tauschek, Max J. | SAE Technical Papers | 1965


    Downsizing of automotive spark ignition engines

    Bingham,J.F. / National Engineering Lab.,Glasgow,GB | Automotive engineering | 1990


    Spark Ignition Engine Progress

    Lucas, Albert G. | SAE Technical Papers | 1967