A Study of the Improvement in Measurements of Soot and Particle Emissions from a DI Gasoline Engine

Abstract

The methods to stabilize the measurements of the soot mass concentration and particulate number and size distribution of particulate matter produced from the combustion chamber in engine experiments were examined with a single cylinder direct injection engine, as well as obtaining the basic data for the construction of particulate matter generation model of SIDI (spark ignition direct injection) gasoline engine. Compared with a direct measurement close to the exhaust ports without any pretreatment, by significantly reducing the pressure pulsations at the inlets of soot meter and particle counter, the results with better stability and reproducibility could be obtained with measuring the soot mass concentration at the downstream of a surge tank equipped in the exhaust pipe, and particulate number and size distribution with the presence of the chamber in the sampling line at the upstream of the diluter even under different conditions of particulate matter emission behavior.