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Experimental Study on Regenerative Characteristics of Diesel Engine DPF Fuel Injection

Ouyang Su;Chu Chaomei;Ling Jianqun;School of Mechanical Engineering, University of Shanghai for Science and Technology;  
Diesel particulate filter(DPF)is currently one of the most effective post-processing devices for particulate emissions, and the DPF regeneration problem has always been the hot spot of research. This article, in view of the DPF injection combustion mode, through engine bench test, studies the influence of different injection parameters of diesel engine on DPF regeneration process. The results show that different oil and gas ratio, oil injection pressure and fuel injection rate have different influence on the peak temperature of DPF carrier during the regeneration process of diesel particulate traps. As the temperature rise rate and peak temperature of the carrier increase with oil and gas ratio, injection pressure and injection rate increases, but if further increase the oil and gas ratio, air flow increase will lead to enhanced heat convection loss and further improvement of fuel injection rate, insufficient oxygen content in DPF carrier, resulting in a decline in peak temperature.
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