Aalysis of emission Formation Processes in a D.I. Diesel Engine by Total In-Cylinder Sampling (1st Report, Effects of L/D of Nozzle Hole and Piston Cavity Diameter)

摘要

An experimental study on emission formation processes, such as particulate, nitric oxide and total hydrocarbon, in a small D.I. diesel engine was carried out by using a newly developed total in-cylinder sampling technique. The sampling method was composed of rapidly opening a blowdown valve attached to the bottom of the piston cavity, and quickly transferring most of the in-cylinder contents into a large sampling chamber below the piston.