Characteristics of particulate emission from marine diesel engines -- comparison between high speed four-stroke engine and low speed two-stoke engine

摘要

In this paper, experimental investigation was conducted with two marine diesel engines, such as highspeed four-stroke engine and low speed two-stroke engine, to know the present condition andcharacteristics of particulate emission. Particulate matter collected on a sampling filter by dilutiontunnel system was divided into SOF and ISF by Soxhlet extraction method. The results show thatSOF concentration decreases and 1SF increases as engine load becomes larger for the four-strokeengine. On the other hand, an increase in engine load promotes both SOF and 1SF emission for thetwo-stroke engine. An analysis of SOF by gas chromatography suggests that cylinder lubrication hasa significant effect on SOF concentration in the exhaust gas of the two-stroke engine.