This paper presents a study of the influence of intake valve closing (IVC) timing on the performance of the high-speed spark ignition (SI) engine, such as the output of torque and power, fuel consumption and emissions. An electrically controlled Variable Valve Timing (VVT) system based on the variable working position belt extender was developed and its pro-type was successfully set up in a 5-valve, double overhead cam (DOHC) SI engine. Test results showed that the IVC timing plays an important role in increasing the power output, decreasing the fuel consumption and CO and HC emissions under both high- and low-speed conditions as compared to the fixed IVC timing. The control of intake valve closing timing is a simple and effective means to improve engine's performance.


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    Titel :

    Effects of Intake Valve Closing Timing on Gasoline Engine Performance and Emissions


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Tao, Jianwu (Autor:in) / Li, Liguang (Autor:in) / Xiao, Min (Autor:in) / Su, Yan (Autor:in) / Wang, Yunkai (Autor:in)

    Kongress:

    SAE International Fall Fuels & Lubricants Meeting & Exhibition ; 2001



    Erscheinungsdatum :

    24.09.2001




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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    Li,L. / Tao,J. / Wang,Y. et al. | Kraftfahrwesen | 2001


    Effects of intake-Valve Closing Timing on Spark-Ignition Engine Combustion

    Hara, Seinosuke / Nagumo, Shin-ichi / Nakajima, Yasuo | SAE Technical Papers | 1985



    Knocking Phenomena in a Gasoline Engine with Late-Intake Valve Closing

    Korah, Nader S. / Rabia, Salah M. | SAE Technical Papers | 1992


    Effects of Intake Valve Timing on Premixed Gasoline Engine with CAI Combustion

    Zhao, Hua / Cao, Li / Kalian, Navin et al. | SAE Technical Papers | 2004