The paper presents the results of a complex study into the feasibility of operating a high-speed diesel engine entirely with biodiesel fuel and its impact on performance. Utilized, the purposes of this study, was Prima 65 (Perkins Engines LTD), direct injection naturally aspirated diesel engine. Initially the tests were conducted with diesel fuel from the commodity markets followed by biodiesel fuel (derived from rapeseed oil methyl ester). The technical, economic and ecological indicators of the engine were compared at full load across the entire frequency range, for both types of fuel. Workflow parameters were calculated from the indicator chart and close analysis of the results obtained was thoroughly conducted. The key findings were consequently summarized and conclusions were made about the suitability of biodiesel fuel for the operation of this type of engine.

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