Experimental study of unsteady state operation of a diesel engine

Dynamic mathematical models of supercharged diesel engines are usually developed on the basis of an unjustified assumption that initial data derived from steady state characteristics for load or speed are valid for unsteady state modes. To determine transient characteristics of a diesel engine, the experimental study of a 26/26 single-cylinder diesel engine was conducted. Load characteristics of the diesel engine were obtained at various constant air pressure (density) values. The results of the experimental study formed the basis for developing the dynamic mathematical model of a diesel engine. It is recommended that functional dependencies should be formulated for such quantities as indicated efficiency, etc. rather than directly for effective efficiency because the former can be obtained by standard tests or derived from the data available for similar types of engines. The results of the experimental study can be used when developing mathematical models of supercharged diesel engines.

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