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Correlation of Split-Injection Needle Lift and Spray Structure
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 12, 2011 by SAE International in United States
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While the use of injection strategies utilizing multiple injection events for each engine cycle has become common, there are relatively few studies of the spray structure of split injection events. Optical spray measurements are particularly difficult for split injection events with a short dwell time between injections, since droplets from the first injection will obscure the end of the first and the start of the second injection. The current study uses x-ray radiography to examine the near-nozzle spray structure of split injection events with a short dwell time between the injection events. In addition, x-ray phase-enhanced imaging is used to measure the injector needle lift vs. time for split injections with various dwell timings. Near the minimum dwell time needed to create two separate injection events, the spray behavior is quite sensitive to the dwell time. For dwell times that are too short to create two injection events, the spray appears to be one long, continuous injection event. In this case, the spray mass distribution shows relatively minor disturbances from the steady-state structure between the commanded injection pulses. For slightly longer dwell times, two distinct injection events are seen; in this case, the behavior of the second spray is quite similar to that of the first spray. Needle motion measurements show that the needle begins to lift 150-200 µs before fuel emerges from the injector. The delay between commanded and actual start of injection is significantly shorter for the second injection than the first injection, even though the needle lift behavior for the first and second injections is similar.
- Jian Gao - Argonne National Lab, Univ. of Wisconsin
- F. Tilocco - Kettering Univ.
- Alan Kastengren - Argonne National Laboratory
- Christopher Powell - Argonne National Laboratory
- Kamel Fezzaa - Argonne National Laboratory
- Zunping Liu - Argonne National Laboratory
- Seoksu Moon - Argonne National Laboratory
- Xusheng Zhang - Argonne National Laboratory
CitationKastengren, A., Powell, C., Fezzaa, K., Liu, Z. et al., "Correlation of Split-Injection Needle Lift and Spray Structure," SAE Technical Paper 2011-01-0383, 2011, https://doi.org/10.4271/2011-01-0383.
- Robert Bosch GmbH Diesel Engine Management 4 th Bentley Publishers Cambridge 2005
- Nehmer, D. Reitz, R. “Measurement of the Effect of Injection Rate and Split Injections on Diesel Engine Soot and NO x Emissions,” SAE Technical Paper 940668 1994 10.4271/940668
- Montgomery, D. Reitz, R. “Six-Mode Cycle Evaluation of the Effect of EGR and Multiple Injections on Particulate and NO x Emissions from a D.I. Diesel,” SAE Technical Paper 960316 1996 10.4271/960316
- Tow, T. Pierpont, D. Reitz “Reducing Particulate and NOx Emissions by Using Multiple Injections in a Heavy Duty Diesel Engine,” SAE Technical Paper 940897 1994 10.4271/940897
- Genzale, C. Pickett, L. Kook, S. “Liquid Penetration of Diesel and Biodiesel Sprays at Late-Cycle Post-Injection Conditions,” SAE Int. J. Engines 3 1 479 495 2010 10.4271/2010-01-0610
- Arai, M. Amagai, K. “Dynamic Behavior of Multi-Stage Injection Diesel Spray,” SAE Technical Paper 970044 1997 10.4271/970044
- Catania, A. Ferrari, A. Spessa, E. “Numerical-Experimental Study and Solutions to Reduce the Dwell-Time Threshold for Fusion-Free Consecutive Injections in a Multijet Solenoid-Type CR System,” Journal of Engineering for Gas Turbines and Power 131 March 2009
- Kastengren, A. Powell, C. F. Arms, D. Dufresne, E. Wang, J. “Spray Diagnostics at the Advanced Photon Source 7-BM Beamline,” 22 nd Annual ILASS-Americas Conference May 2010 Cincinatti, OH
- Kastengren, A. Powell, C. F. Liu, Z. Moon, S. Gao, J. Zhang, X. Wang, J. “Axial Development of Diesel Sprays at Varying Ambient Density,” 22 nd Annual ILASS-Americas Conference May 2010 Cincinatti, OH
- Kastengren, A. Powell, C. F. Im, K.-S. Wang, Y.-J. Wang, J. “Measurement of Biodiesel Blend and Conventional Diesel Spray Structure Using X-Ray Radiography,” Journal of Engineering for Gas Turbines and Power 131 November 2009
- Wang, T.-C. Han, J.-S. Xie, X.-B. Lai, M.-C. Henein, N. Schwarz, E. Bryzik, W. “Parametric Characterization of High-Pressure Diesel Fuel Injection Systems,” Journal of Engineering for Gas Turbines and Power 125 April 2003 412 426
- Lai, M-C. Wang, T-C. Xie, X-B. Han, J-S. Henein, N. Schwarz, E. Bryzik, W. “Microscopic Characterization of Diesel Sprays at VCO Nozzle Exit,” SAE Technical Paper 982542 1998 10.4271/982542
- Chang, C. Farrell, P. “A Study on the Effects of Fuel Viscosity and Nozzle Geometry on High-Injection Pressure Diesel Spray Characteristics,” SAE Technical Paper 970353 1997 10.4271/970353
- Kastengren, A. Powell, C. F. Liu, Z. Moon, S. Gao, J. Zhang, X. Wang, J. “End-of-Injection Behavior of Diesel Sprays Measured with X-Ray Radiography,” ASME ICED 2010 Fall Technical Conference, Paper ICEF2010-35052
- Kastengren, A. Powell, C. F. Liu, Z. Fezzaa, K. Wang, J. “High-Speed Imaging of Diesel Injector Needle Motion,” ASME ICED 2009 Spring Technical Conference, Paper ICES2009-76032