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http://dx.doi.org/10.7467/KSAE.2014.22.5.108

Analysis on Combustion Characteristics of CRDi Single-cylinder Diesel Engine with Direct Needle-driven Piezo Injector  

Chung, Myungchul (Department of Mechanical Engineering, Graduate School, Soongsil University)
Sung, Gisu (Department of Mechanical Engineering, Graduate School, Soongsil University)
Kim, Sangmyung (Department of Mechanical Engineering, Graduate School, Soongsil University)
Lee, Jinwook (Department of Mechanical Engineering, Soongsil University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.22, no.5, 2014 , pp. 108-115 More about this Journal
Abstract
In this study, experimental approaching method was applied under and single-cylinder engine to research the performance of direct needle-driven piezo injector (DPI) for CR direct-injection. As key-point factor of this DPI that relies on direct-acting operating of injector needle, unlike conventional hydraulic-servo, its nozzle needle can be directly driven by piezo actuator. Thus, effect of direct-acting injection of DPI on diesel combustion and emission characteristics was investigated under common-rail single-cylinder direct-injection engine, equipped with three different driving mechanism, including indirect-acting solenoid, piezo and DPI system. As main results, it found that a direct-acting piezo injector has higher of IMEP. And it has higher heat release rate during premixed combustion and mixing controlled combustion phase due to its higher heat release, even though nitrogen oxide (NOx) formations were increased slightly.
Keywords
Direct needle-driven piezo injector; Servo-hydraulic indirect-driven piezo injector; CRDi; Single-cylinder diesel engine; Diesel combustion;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 J. B. Heywood, Internal Combustion Engine Fundamentals, McGraw Hill, New York, pp.541-562, 1988.
2 환경부 보도자료, 2015년부터 차량구매시 온실가스 배출량 따라 보조금-부담금 부여, 2013.
3 Y. J. Jung, C. S. Bae, J. Y. Jang and D. S. Kim, "The Effect of Injector Configurations on the Partially Premixed Charge Compression Ignition Combustion and Emissions in a Heavy Duty Diesel Engine," KSAE Annual Conference Proceedings, pp.248-254, 2010.
4 S. H. Yoon, H. K. Suh and C. S. Lee, "Effect of Spray and EGR Rate on the Combustion and Emission Characteristics of Biodiesel Fuel on a Compression Ignition Engine," Energy & Fuels, Vol.23, No.3, pp.1486-1493, 2009.   DOI   ScienceOn
5 G. Bression, D. Soleri, S. Savy, S. Dehoux, D. Azoulay, H. B. Hamouda, L. Doradoux, N. Guerrassi and N. Lawrence, "A Study of Methods to Lower HC and CO Emissions in Diesel HCCI," SAE 2008-01-0034, 2008.
6 S. H. Yoon, M. Y. Kim, D. S. Kim, J. H. Lee and C. S. Lee, "Effect of Early Injection Strategy on the Combustion and Emission Characteristics of the Common-rail DI Diesel Engine," Transactions of KSAE, Vol.14, No.4, pp.26-31, 2006.   과학기술학회마을
7 M. Sjoberg and J. E. Dec, "An Investigation into Lowest Acceptable Combustion Temperatures for Hydrocarbon Fuels in HCCI Engines," Proc. Comb. Inst., Vol.30, No.1, pp.2719-2726, 2005.   DOI   ScienceOn
8 G. Dober, S. Tullis, G. Greeves, N. Milovanovic, M. Hardy and S. Zuelch, "The Impact of Injection Strategies on Emissions Reduction and Power Output of Future Diesel Engines," SAE 2008-01-0941, 2008.
9 G. Bression, P. Pacaud, D. Soleri, J. Cessou, D. Azoulay, N. Lawrence, L. Doradoux and N. Gurerrassi, "Comparative Study in LTC Combustion between a Short HP EGR Loop without Cooler and a Variable Lift and Duration System," 17th Aachen Colloquium, Automobile and Engine Technology, Germany, 2008.
10 M. Hardy and A. Tolliday, Improvements Relating to Fuel Injector Control, Delphi Technologies Inc., Patent EP 2136062 A1, 2009.
11 G. Dober, N. Guerrassi and K. Karimi, "Mixture Preparation and Combustion Analysis, a Key Activity for Future Trends in Diesel Fuel Injection Equipment," SIA Diesel Powertrain International Conference, Luxembourg, 2012.
12 J. W. Lee, J. S. Park and C. S. Bae, "Assessment of Diesel and JP-8 on Direct Injection Diesel Engine" KSAE Fall Conference Proceedings, pp.290-295, 2007.