Integral Approach for Optimum Operation of Diesel After Treatment Devices

Naeim  Henein, Wayne State University

Optimum operation of diesel after treatment devices depends to a large extent on the properties of the feed gas. This work presents an integral approach to control the different engine operating parameters aimed at producing exhaust gases of appropriate composition and temperature needed for the efficient operation of different types of after treatment devices. The developed strategies are based on an experimental investigation of combustion and emissions in a small bore high speed single-cylinder research diesel engine equipped with a common rail injection system. The experiments were conducted at different loads, under simulated turocharged engine conditions and covered a wide range of injection pressures, EGR rates, injection timings and swirl ratios. The tarde-offs between the emisssions and fuel economy is determined for each strategy.

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