Adaptability of Direct Injection Impinging Distribution Combustion System to a Small Diesel Engine

An impinging distribution spray combustion system, named OSKA, was applied to a small direct injection diesel engine in order to reduce the wall quenching originated emittants, e. g. SOF and THC. Experimentation was carried out using a single cylinder engine of bore × stroke of 93×92 mm, with varying the piston cavity geometry and, the injection and impinging conditions. The combustion chamber geometry has great effects on emission characteristics and performances. KIVA 3 numerical analysis on the flow characterization has helped to interpret these effects. It also clarified the effect of dimple.