Twin jet spray and droplet stream impact injectors for novel combustion processes in Otto and Diesel engines

Abstract

There have been numerous studies of fuel sprays for internal combustion engines with an emphasis on Single-Jet Sprays (SJS). Various measuring techniques have been employed to acquire quantitative information on different spray properties, including droplet size and droplet speed, as functions of the supply pressure, the jet nozzle diameter and the jet nozzle geometry. Correlating the measured spray properties, e.g. the spray droplet size, with the performance of a particular engine, it has been discovered that droplet size reductions have very positive effects on the combustion process. Reducing the jet nozzle diameter and increasing the supply pressure yield smaller droplets.