Abstract
Effects of ambient conditions and fuel injection parameters on diesel combustion under supercharged conditions have been investigated using a constant volume vessel. NOx formation process has been investigated using a total gas-sampling device. The results indicate that it is possible to realize entirely diffusion combustion in this experiment like what seen in highly supercharged engines. Elevating injection pressure increases the NOx formation rate during heat release, however reduces final NOx mass per released heat. Nevertheless, there is no remarkable change in final NOx level. Lowering oxygen concentration shows significant reduction in NOx formation rate and final NOx concentration.
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