Increasing the compression ratio is one of the methods to increase the thermal efficiency of a gasoline spark-ignition (SI) engine. However, this exposes the end-gas to thermodynamic conditions that are prone to cause spontaneous ignition. The resulting knock acts as a barrier to the thermal efficiency improvement, and thus, may offset the thermal efficiency benefit of the high compression ratio. In this study, performance and knock characteristics with different coolant flow directions and coolant temperatures were evaluated in a port fuel injection SI gasoline engine with a compression ratio of 14. The coolant temperature was reduced to suppress the knock. Although the knock was accordingly suppressed, the fuel consumption increased because of the increase in the heat loss. From a knock sensor analysis, the knock was mainly found in the exhaust side. Therefore, the coolant flow direction from the intake to the exhaust in the baseline engine head was changed to the opposite direction in a modified engine head for suppressing the knock in the exhaust side. The change in the coolant flow direction resulted in knock suppression as well as fuel consumption reduction.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Effects of Engine Cooling Strategy on Knock Suppression in High-Compression Ratio Spark-Ignition Engine


    Weitere Titelangaben:

    Int.J Automot. Technol.


    Beteiligte:
    Lee, Junsun (Autor:in) / Lee, Yonggyu (Autor:in) / Kim, Junghwan (Autor:in) / Kim, Changup (Autor:in) / Oh, Seungmook (Autor:in) / Lee, Juhun (Autor:in) / Jung, Jinyoung (Autor:in) / Cha, Jeonghwa (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2022-04-01


    Format / Umfang :

    12 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Knock effects on spark-ignition engine emission and performance

    Kaelblein,T. / Jeong,Y.I. / Rhee,K.T. et al. | Kraftfahrwesen | 1990


    Knock effects on spark-ignition engine emission and performance

    Kaelblein, T. / Jeong, Y.I. / Rhee, K.T. | Tema Archiv | 1990


    Lubricant reactivity effects on gasoline spark ignition engine knock

    Amann,M. / Alger,T. / Southwest Res.Inst.,US | Kraftfahrwesen | 2012


    Knock Effects on Spark-ignition Engine Emission and Performance

    Rhee, K. T. / Kaelblein, Thomas / Jeong, Y. 1. | SAE Technical Papers | 1990


    Lubricant Reactivity Effects on Gasoline Spark Ignition Engine Knock

    Amann, Manfred / Alger, Terrence | SAE Technical Papers | 2012