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New Generation Multi-hole Fuel Injector for Direct-Injection SI Engines - Optimization of Spray Characteristics by Means of Adapted Injector Layout and Multiple Injection
Technical Paper
2007-01-1404
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The paper discusses spray characteristics of fuel injectors with multi-hole nozzle (MHI) for DISI engine applications with homogeneous combustion and optional turbocharger (down-sizing concepts). Depending on the engine's operating mode the predominantly influencing spray parameters change. Although several injection concepts are available for DISI engines multi-hole injectors provide high spray flexibility to meet the requirements. The work presents a methodology called spray targeting for adapting the MHI adequately to the engine and tap its full potential. This requires fundamental knowledge of the influencing parameters on spray formation. A study using a DOE approach is introduced to identify the main influencing parameters on spray characteristics, e.g. nozzle geometry, operating parameters, and injection timing parameters. In particular an injector operation strategy which splits the required fuel quantity per cycle into multiple parts is identified as an adequate measure for effective improvement of spray quality regarding homogeneity and spray geometry. Furthermore it enables controlling of spray parameters and optimization of the mixture to further reduce exhaust emissions (e.g. smoke).
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Citation
Stach, T., Schlerfer, J., and Vorbach, M., "New Generation Multi-hole Fuel Injector for Direct-Injection SI Engines - Optimization of Spray Characteristics by Means of Adapted Injector Layout and Multiple Injection," SAE Technical Paper 2007-01-1404, 2007, https://doi.org/10.4271/2007-01-1404.Also In
References
- Fraidl et al. Verlag 2000
- Fekete et al. Evaluation of NOx Storage Catalysts For Lean Burn Gasoline Fueled Passenger Cars SAE transactions 2000
- Landenfeld Kufferath Gerhardt Gasoline Direct Injection - SULEV Emission Concept SAE 2004-01-0041 2004
- Spicher et al. Die strahlgeführte Direkteinspritzung als Zukunftskonzept für Ottomotoren MTZ-Konferenz Motor 2006
- Varde Spray Cone Angle and its Correlation in a High Pressure Fuel Spray Can. J. of Chem. Eng. 1985
- Elkobt Fuel Atomization for Spray Modeling Prog. Energy Combust. Sci. 1982
- Arai et al. Disintegrating Process and Spray Characterization of Fuel Jet Injected by a Diesel Nozzle SAE 840275 1984
- Hiroyasu Arai Structures of Fuel Sprays in Diesel Engines SAE 900475 1990
- Introduction to Statistical Experimental Design http://www.acc.umu.se/-tnkjtg/Chemometrics/Editorial 2002
- NIST/SEMATECH e-Handbook of Statistical Methods http://www.itl.nist.gov/div898/handbook/ 2006