Abstract
Abstract This paper described the effect of split injections on the stability of combustion and emission characteristics in a directinjection gasoline engine at various operating conditions. In order to investigate the influence of direct injection gasolineengine, the fuel injection timing was varied direct fuel injection at various fuel pressure. The experimental apparatus consistedof GDI engine with 4 cylinder, EC dynamometer, injection control system, and exhaust emissions analyzer. The emission andcombustion characteristics were analyzed for the fuel injection timing and fuel injection pressure strategies. It is revealed thatCO and HC emissions are dramatically decreased at advanced injection timing. Also, engine performance is increased atincrease fuel injection pressure. 기호설명 ABDC : after bottom dead centerBBDC : before bottom dead centerATDC : after top dead centerBTDC : before top dead centerINJ T : fuel injection timing[degree ATDC]IG T : ignition timing[degree]P INJ : fuel injection pressure[MPa]C
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