Browse Publications Technical Papers 2002-01-2807
2002-10-21

Influence of Atomization Quality on Mixture Formation, Combustion and Emissions in a MPI-Engine Under Cold-Start Conditions, Part I 2002-01-2807

The study presented in this two part paper was focused on the influence of primary mixture formation on engine running behavior covering the areas combustion and raw emissions. Two different concepts for primary fuel atomization were utilized and compared, the standard production injector and a flash boiling injector. The spray generated by the flash boiling injector was characterized by a significant reduction in droplet size and a partial direct vaporization during the injection process by preheating the fuel inside the injector. In this study special emphasis was put on the transient process of engine start between typical cooling water temperatures of -7°C and 85°C. Various measurements and visualization techniques were applied to investigate the mixture preparation, the deposition of liquid fuel on the walls, the start of combustion, and in-cylinder and engine-out UHC emissions.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 43% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.
X