燃料噴霧の空間分布が直噴ディーゼル燃焼に及ぼす影響

概要

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Characteristics of combustion and exhaust emissions of a D. I. Diesel engine were investigated under various spatial arrangements of fuel sprays. The cylinder liner was elongated and a flat-too piston was installed in the engine to obtain a relatively large pancake-type combustion chamber. Six to twelve fuel injection nozzles with a single hole were installed in the elongated cylinder liner parallel to each other, and one injection nozzle with six holes was installed in the cylinder head. Such modification of the engine made it possible to obtain radial arrangement of six fuel sprays and parallel arrangement of six to twelve sprays in the combustion chamber. The parallel arrangement of six to ten sprays showed shorter ignition delay than the radial arrangement of six sprays. Changing from the radial arrangement of six sprays to the parallel arrangement of six sprays reduced NO_x and smoke emissions simultaneously and resulted in an increase in indicated mean effective pressure.
一般社団法人日本機械学会の論文
1996-10-25