Effect of DMC Blended Fuel on PM Formation in Combustion Chamber of DI Diesel Engine Observed via Direct Sampling System

Abstract

The purpose of this paper is to study PM reduction mechanism of DMC blended fuel in DI diesel engine. A direct sampling system was used to obtain spatial and temporal information of combustion products in a combustion chamber. Experiments were conducted using gas oil and DMC blended fuel. The experiment data was arranged with isoconcentration maps. As a result, maximum concentration THC and SOF reduce, the fuel spray volume of DMC blended fuel which is low boiling temperature was slightly increased than gas oil.
In addition, DMC blended fuel have oxygen. Therefore, local excess air ratio increased.