This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Effects of Spray Characteristics with Different Geometries on the Performance of a DI Diesel Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 06, 2008 by SAE International in United States
Annotation ability available
The characteristics of diesel spray injected into the cylinder provide crucial clues to the perception of the combustion performance in a compression ignition engine. In this study, five different diesel common rail injectors were examined which have different hole numbers, orifice sizes, jet cone angles, and hydraulic flow rates. Both the macroscopic and microscopic characteristics of diesel sprays were compared through Mie-scattered light imaging and PDA (Phase-Doppler anemometry) measurements. Seven hole injector with smaller hole was found to give better air/fuel mixing and favorable droplet size compared with other injectors.
To evaluate the feasibility of achieving lower emission level with the different diesel sprays, the combustion and emission characteristics in case of 6 and 7 hole injectors were investigated under the same fuel flow rate condition in a light duty DI diesel engine. The results showed that 7 hole injector with pilot injection had shorter combustion delay and combustion duration, but these effects were not found in high speed and high load condition with no pilot injection. The seven hole injector could be utilized to achieve lower emission compared with six hole one because of more improved spatial distribution of fuel in combustion chamber. The full load performance such as brake torque and thermal efficiency of 6 and 7 hole injectors were slightly different according to the engine speed.
CitationWoo, Y., Lee, Y., Kim, Y., Kim, J. et al., "Effects of Spray Characteristics with Different Geometries on the Performance of a DI Diesel Engine," SAE Technical Paper 2008-01-2468, 2008, https://doi.org/10.4271/2008-01-2468.
- Dodge L. G. Simescu S. Neely G. D. Maymar M. J. Dickey D. W. Savonen C. L. “Effect of Small Holes and High Injection Pressures on Diesel Engine Combustion” SAE 2002-01-0494 2002
- Lee Seungwon Kook Sanghoon Choi Wook Bae Choongsik Kim Jangheon “The Combined Effect of Multi-hole Injector with Pilot Injection and EGR in a HSDI Diesel Engine” KSAE Fall Conference Proceedings I 280 285 2004
- Yuyin Z. Keiya N. Shinsuke N. Tomoaki I. “Spray Characteristics of Group-Hole Nozzle for D.I. Diesel Engine” SAE 2003-01-3115 2003
- Marcus S. Alfred L. Christian F. “Influence of Nozzle Hole Geometry, Rail Pressure and Pre-Injection on Injection, Vaporization and Combustion in a Single-Cylinder Transparent Passenger Car common rail Engine” SAE 2002-01-2665 2002
- David D. W. Peter K. S. Rolf D. R. “Diesel Engine Combustion Chamber Geometry Optimization Using Genetic Algorithms and Multi-Dimensional Spray and Combustion Modeling” SAE 2001-01-0547 2001
- Kang Jinsuk Bae Choongsik “Diesel Spray Development from VCO nozzles for High Pressure Direct-Injection,” Transactions of KSAE 8 3 28 36 2000
- Kang Jinsuk “Spray Characteristics of High Pressure Diesel Injection with regard to Fuel Injection Equipments,” KAIST 2003
- Fujimoto H. Gen “No Flame Region in Diesel Combustion in Quiescent Atmosphere,” THIESEL 2006 Conference 2006
- Siebers Dennis L. “ Liquid-Phase Fuel Penetration in Diesel Sprays,” SAE Paper 980809 1998
- Konno M. Chikahisa T. Murayama T. “Investigation on the Simultaneous Reduction of Particulate & NOx by Controlling Both the Turbulence & the Mixture Formation in DI Diesel Engine,” SAE 932797 1993
- Park J. K. Park T. I. Choi J. S. “Technologies of NOx Reduction on Diesel Engine,” Journal of the Korean Society of Automotive Engineers 1992 014 003 1 11
- Wade W. R. Hunter C. E. Trinker F. H. Cikanek H. A. “Reduction of NOx and Particulate Emissions in the Diesel Combustion Process” ASME Transaction 109 426 434 1987