선박용 디젤기관의 연료분사 시기가 배기배출물 특성에 미치는 영향

Effects of Fuel Injection Timing on Exhaust Emissions Characteristics in Marine Diesel Engine

A study on the exhaust emissions of marine diesel engine with various fuel injection timing is performed experimentally.In this paper, fuel injection timing is changed from BTDC 14° to 20° by 2°intervals, the experiments are performed at engine speed 1800rpm and from load 0% to 100% by 25% intervals, and main measured parameters are fuel consumption rate, Soot, NOx, HC and CO emissions etc. The obtained conclusions are as follows (1) Specific fuel consumption is indicated the least value at BTDC 18° of fuel injection timing and it is increased in case of leading the injection timing. (2). Soot emission is decreased in case of leading fuel injection timing and it is increased in the form of convex downwards with increasing the load. (3) NOx emission is increased in case of leading fuel injection timing and it is increased in the form of straight line nearly with increasing the load. (4) HC and CO emissions are decreased in case of leading fuel injection timing and they are changed in the form of convex downwards with increasing the load.