예혼합 압축착화 디젤엔진의 부하변동에 따른 연소특성

Abstract

In order to reduce exhaust emissions from diesel engine under wide load range, an experimental study was conducted based on a new concept of combustion, that is, most of the fuel is supplied as premixed homogeneous charge and small amount of diesel fuel directly injected into a cylinder to ignite. In this study we compared combustion characteristics of HCDC(Homogeneous Charge Diesel Combustion) engine with that of commercial diesel engine. At high premixed fuel ratio and high load range, it was observed that premixed combustion temperature was low and diffusion combustion duration was shorten. From this experiment, it could be found that NOx reduction is caused by the lower maximum temperature and soot reduction is caused by rapid combustion under diffusion combustion part.