Development of In-cylnder 2D Dropsize Measurement using LIEF-Mie Scattering in a Direct Injection Engine

Abstract

This paper presents a measurement technique for visualizing the two dimensional distribution of the in-cylinder sauter mean diameter (SMD) and analyzing the effect of the SMD distribution to mixture formation on direct injection (DI) engine.First, a technique for visualizing the SMD distribution based on the SMD dependence of fluorescence and Mie Scattering ratio is described.
As the next step, this method was applied to optical engine in two engine condition of different engine speed. The correlation between the SMD distribution and mixture formation was shown experimentally by changing in- cylinder gas flow.