The purpose of this study was to determine the effect of injector nozzle hole size, shape, and finish on performance and emissions in a light-duty diesel engine. Two sets of six-hole valve covered orifice (VCO) nozzles were tested with nearly identical volumetric flow rates but varying geometry and finish. The 17% hydro-erosion (HE) nozzles had a 22% larger discharge coefficient (CD), compared to the 7% HE nozzles. In order to maintain similar volumetric flow rates, the orifice diameter of the 17% HE nozzles were reduced by almost 10%.The nozzles were tested in a 1.7L, four-cylinder, common rail diesel engine, operating on conventional D2 diesel fuel. The 17% HE, conical-shaped nozzles reduced fuel specific particulate matter (PM) and increased fuel specific oxides of nitrogen (NOx) emissions, over the 7% HE, straight-shaped nozzle. In-cylinder visualization showed a consistent trend toward reduced late-cycle soot concentration with the 17% HE nozzles which trended with engine-out soot.
Effect of Injector Nozzle Finish on Performance and Emissions in a HSDI, Light-duty, Diesel Engine
Sae Technical Papers
SAE 2006 World Congress & Exhibition ; 2006
2006-04-03
Conference paper
English
Effect of Injector Nozzle Finish on Performance and Emissions in a HSDI, Light-duty, Diesel Engine
British Library Conference Proceedings | 2006
|Effect of injector nozzle finish on performance and emissions in a HSDI, light-duty, diese engine
Automotive engineering | 2006
|Effect of Nozzle hole Geometry on a HSDI Diesel Engine-Out Emissions
SAE Technical Papers | 2003
|Effect of nozzle hole geometry on a HSDI diesel engine-out emissions
Automotive engineering | 2003
|British Library Conference Proceedings | 1997
|