Some considerations for reducing black smoke in the exhaust gas from a diesel engine

디이젤機關의 黑煙防止에 관한 考察

It has been a long time that black smoke emitted from buses and trucks powered with diesel engines, especially city-buses, came to be a serious air pollution problems in large cities as Seoul and Pusan. Therefore, proper means to reduce black smoke from diesel engines have to be considered as soon as possible, because it will take quite a long time to replace major passenger transportation system in cites from city-buses to subway. This paper, as a study on the reduction of diesel black smoke, showes how the black smoke of diesel engines can be reduced at various loads and engine speed by supplying small amount of gaseous fuel as LPG into the intake manifold. Thermal efficiency has been also considered for users, and confirmed through the engine test.

본 연구에서는 LPG와 같은 기체연료를 디이젤기관의 흡기관에 소량 흡입시키 는 방법을 이용해서 비교적 간단히 흑연을 저감시킬 수 있는 대안을 검토한 것으로서, 기관사용자에게는 열효율이 향상되고 연료소비율이 저하되는 등의 이점이 있다. 또 이 방법을 기관의 부하나 회전속도의 변동에 따라 유효하게 이용할 수 있는 수법과 문 제점에 대해서도 검토하여 보았다.