This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Numerical Study of the Combustion Chamber Shape for Common Rail H.S.D.I. Diesel Engines
Technical Paper
2000-01-1179
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2000 World Congress
Language:
English
Abstract
The Common-rail injection system has allowed achieving a more flexible fuel injection control in DI-diesel engines by permitting a free mapping of the start of injection, injection pressure, rate of injection. All these benefits have been gained by installing this device in combustion chambers born to work with the conventional distributor and in-line-pump injection systems. Their design was aimed to improve air-fuel mixing and therefore they were characterized by the adoption of high-swirl ports and re-entrant bowls. Experiments have shown that the high injection velocities induced by common rail systems determine an enhancement of the air fuel mixing. By contrast, they cause a strong wall impingement too. The present paper aims to exploit a new configuration of the combustion chamber more suited to CR injection systems and characterized by low-swirl ports and larger bowl diameter in order to reduce the wall impingement. The goal is to achieve a higher air flow rate during induction as well as to reduce the fuel vapor wall impingement without compromising air-fuel mixing efficiency. This new combustion chamber configuration has been tested numerically and its performances have been compared to those of a H.S.D.I four valve diesel engine conventional combustion chamber. The analysis has been carried out by using a customized version of the CFD code KIVA3. Experimental results of the conventional combustion chamber have been used to validate the numerical models. The influence of the injection system configuration (i.e, hole numbers, inclination of the spray axis with respect cylinder head) on pressure cycle and NOx and soot engine-out emissions has been analyzed too. Computational results seem to indicate that the new combustion system concept may provide relevant benefits with respect to engine-out emissions without reducing engine performance.
Recommended Content
Authors
Topic
Citation
Bianchi, G., Pelloni, P., Corcione, F., Mattarelli, E. et al., "Numerical Study of the Combustion Chamber Shape for Common Rail H.S.D.I. Diesel Engines," SAE Technical Paper 2000-01-1179, 2000, https://doi.org/10.4271/2000-01-1179.Also In
References
- Stumpp, G. Ricco, M. “Common Rail - An Attractive Fuel Injection System for Passenger Car DI Diesel Engines” SAE Paper 960870 1996
- Boehner W. Hummel K. “Common Rail System (CR - System) for Commercial Diesel Vehicles” SAE Paper 970345 1997
- Flaig, U. Polach, W. Ziegler, G. “Common Rail Injection System for Passenger Car DI Diesel Engines; Experience with Applications for Series Production Projects” SAE Paper 1999-01-0191 1999
- Inagaki, K. Takasu, Semon Nakakita, K. “In-Cylinder Quantitative Soot Concentration Measurement By Laser- Induced Incandescence” SAE Paper 1999-01-0508 1999
- Corcione, F.E Allocca, L. Pelloni, P. Bianchi, G.M. Luppino, F Ivaldi, D. “Modeling atomization and drop breakup of high-pressure Diesel Sprays” Proceedings of the International Conference ICE 99 Capri (Italy) September 1999
- Ishikawa, N. Zhang, L. “Characteristics of Air-Entrainment in Diesel Spray” SAE Paper 1999-01-0522 1999
- Rajalingam, B.V. Farrel, P. “The Effect of Injection Pressure on Air Entrainment into Transient Diesel Sprays” SAE Paper 1999-01-0523 1999
- Amsden, A.A. O'Rourke, P.J. Butler, T.D. “KIVA-II A Computer Program for Chemically Reactive Flows with Sprays,” Los Alamos National Labs 1989
- Amsden, A.A. O'Rourke, P.J. Butler, T.D. “Kiva-3: A KIVA Program with Bock-Structured Mesh for Complex Geometries,” Los Alamos National Labs 1993
- Gonzales, D. Borman, M. A. Reitz R. D. “Modeling Diesel Engine Spray Vaporization and Combustion” SAE Paper 920579 1992
- Abraham, J. “What is the Adequate Resolution in the Numerical Computation of Transient Jets?” SAE Paper, 970051 1997
- Abraham, J. Magi, V. “A Virtual Liquid Source (VLS) Model for Vaporizing Diesel Sprays” SAE Paper 1999-01-0911 1999
- Bianchi, G.M. Pelloni, P. “Modeling the Diesel Spray Breakup by Using a Hybrid Model” SAE Paper 1999-01-0226 SAE International Congress Detroit 1999
- Bianchi, G.M. Pelloni, P. “A Cavitation-Induced Atomization Model for High.-Pressure Diesel Spray Simulations” Technical Paper 99SI044, 32nd International ISATA Conference Wien June 1999
- Reitz, R. D. Diwakar, R. “Structure of High-Pressure Fuel Sprays” SAE Paper 870598 1987
- Han, Z. Uludogan, Ali Hampson, G.J Reitz, R. D. “Mechanism of Soot and NOx Emissions Reduction Using Multiple Injection in a Diesel Engine” SAE Paper 960633 1996
- Bo, T. Clerides, D. Gosman, A. D. Theodossopoulos, P. “Prediction of the Flow and Spray Processes in an Automobile DI Diesel Engine SAE Paper 970882
- Arcoumanis, C, Gavaises, M. French, B. “Effect of Fuel Injection on the Structure of Diesel Sprays,” SAE Paper 970799 1997
- Chaves, H. Knapp, M. Kubitzek, A. Obermeier, F. Schneider, T. “Experimental Study of Cavitation in the Nozzle Hole of Diesel Injectors Using Transparent Nozzles” SAE Paper 950290 1995
- Fath, A. Munch, K.U. Leipertz, A. “Spray Break-Up Process of Diesel Fuel Investigated Close to the Nozzle” Proceedings of ICLASS-'97 August 18-22 Seoul, Korea 1997
- Habchi, C Baritaud, T. et al. “Modeling Atomization and Break Up in High Pressure Diesel Sprays” SAE Paper 970881 1997
- Beatrice, C. Belardini, P. Bertoli, C. Cameretti, M.C. Cirillo, N.C. “Fuel Jets Model for Multidimensional Diesel Combustion Calculation: an Update” SAE Paper 950086 1995
- Kong, S.-C Han, Z. Reitz, R. D. “The Development and Application of a Diesel Engine and Combustion Model for Multidimensional Engine Simulation” SAE 950278 1995
- Abraham, J. Bracco, F.V. Reitz, R. D. “Comparison of Computed and Measured Premixed Charged Engine Combustion,” Combustion and Flame 60 1985
- Tanner, F. X. Reitz, R.D. “Scaling Aspects of the Characteristic Time Combustion Model in the Simulation od Diesel Engines” SAE Paper 1999-01-1175 1999
- Bianchi, G.M. Richard, K. Reitz, R. D. “Effect of Initial Condition in Multidimensional Combustion Simulations of HSDI Diesel Engines” SAE PAPER 1999-01-1180 SAE International Congress Detroit 1999
- Chan, M. Das, S. Reitz, R.D. “Modeling Multiple Injection and EGR Effects od Diesel Engine Emissions” SAE Paper 972864 1997
- Zanforlin, S Reitz, R.D. Gentili, R “Studying the Roles of Kinetics and Turbulence in the Simulation of Diesel Combustion by Means of an Extended Characteristic-Time-Model” SAE Paper 1999-01-1177 1999
- Dec, J. E. “A conceptual Model of DI Diesel Combustion Besed on Laser Sheet Imaging” SAE Technical Paper 970873 1997
- Tennison, P. Georjon, T. L. Farrell, P. V. Reitz, R. D. “An Experimental and Numerical Study of Sprays from Common Rail Injection System for Use in HSDI Diesel Engines” SAE 980810 1998