Recently, customer requirements for engines have become more demanding, not only in terms of power, but also for fuel economy. To deal with these demands, the four-valve per-cylinder engine is now widely used for passenger cars. The direct acting systems and roller rocker arm system are two major valve train systems for passenger car engines. The advantage of a direct-acting system is its simple mechanism and low cost. However, it has higher friction than a roller rocker arm system.To improve on this situation, we at FujiOozx have worked on reducing the moving mass for the direct acting system. Using newly-developed lightweight valve train components, moving mass was reduced by 28%. Consequently, approximately 40% of friction loss was eliminated and improvement of noise and smaller engine package size were achieved (with optimization of cam profile and valve spring) to create a lightweight, direct-acting valve system.


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    Titel :

    Advantage of Lightweight Valve Train Component on Engines


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Mori, Akiyoshi (Autor:in) / Ohtsubo, Kizuku (Autor:in) / Hara, Nobuo (Autor:in) / Kanzaki, Tatsuo (Autor:in)

    Kongress:

    International Congress & Exposition ; 1998



    Erscheinungsdatum :

    23.02.1998




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Advantage of lightweight valve train component on engines

    Kanzaki,T. / Hara,N. / Mori,A. et al. | Kraftfahrwesen | 1998


    Valve Train Design of Modern Engines

    Flierl, R. | Online Contents | 1993


    Investigations on Valve Train Noise in Multi-Valve Engines

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


    Investigations on valve train noise in multi-valve engines

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


    Valve Train Design For Multivalve Automotive Gasoline Engines

    Heath, A. R. | SAE Technical Papers | 1988