ディーゼル機関性能に及ぼす燃料噴射ノズルの流量特性の影響

概要

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In recent years, the flow coefficient of injection nozzles has been increased in order to improve output and performance of diesel engines. The authors have studied the relation between flow coefficient and rounding-off of nozzle hole inlets. The nozzle with proper non-dimensional R: more than 0.3, are getting stable and increasing about 20% of the flow coefficient. The proper nozzle hole diameter of the rounding-off nozzles are smaller than the conventional ones. The engine performance with these nozzles also improved because of the better injection and spray characteristics in wide load range, especially fuel consumption and exhaust smoke. The main factor shall be considered cutting-off of after-burning from the injection and combustion analyses. These nozzles shall be also expected to prolong endurance time because of preventing hole deformation.
社団法人日本マリンエンジニアリング学会の論文