The sensitivity of engine performance to gas-dynamic phenomena in the exhaust system has been known for around 100 years but is still relatively poorly understood. The nonlinearity of the wave-propagation behaviour renders simple empirical approaches ineffective, even in a single-cylinder engine. The adoption of analytical tools such as engine-cycle-simulation codes has enabled greater understanding of the tuning mechanisms but for multi-cylinder engines has required the development of accurate models for pipe junctions. The present work examines the propagation of pressure waves through pipe junctions using shock-tube rigs in order to validate a computational model. Following this the effects of exhaust-system gas dynamics on engine performance are discussed using the results from an engine-cycle-simulation program based on the equations of one-dimensional compressible fluid flow.


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    Title :

    Exhaust system gas-dynamics in internal combustion engines


    Contributors:
    Pearson, R. (author) / Bassett, M. (author) / Virr, P. (author) / Lever, S. (author) / Early, A. (author)


    Publication date :

    2006


    Size :

    10 Seiten, 25 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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