Computational Study of the Effects of Injection Timing, EGR and Swirl Ratio on a HSDI Multi-Injection Diesel Engine Emission and Performance

Reductions in fuel consumption, noise level, and pollutant emissions such as, Nitrogen Oxide (NO X ) and Particulate Matter (PM), from direct-injection (DI) diesel engines are important issues in engine research. To achieve these reductions, many technologies such as high injection pressure, multiple injection, retarded injection timing, EGR, and high swirl ratio have been used in high-efficiency DI diesel engines in order to achieve combustion and emission control. However, each technology has its own advantages and disadvantages, and there is a very strong interaction between these methods when they are simultaneously used in the engine. This study presents a computational study of both the individual effect and their interactions of injection timing, EGR and swirl ratio separately and their interaction in a HSDI common rail diesel engine using the KIVA-3V code. It was found that the calculated results agree well with the experimental data obtained and there exists a set of optimal injection timing, EGR and swirl ratio for simultaneously reduction in both NO X and soot under a particular load. Copyright © 2003 SAE International.

[1]  S. M. Shahed,et al.  Effects of Injection Timing and Exhaust Gas Recirculation on Emissions from a D.I. Diesel Engine , 1981 .

[2]  Rolf D. Reitz,et al.  Multidimensional modeling of combustion for a six-mode emissions test cycle on a DI diesel engine , 1997 .

[3]  Song-Charng Kong,et al.  The Development and Application of a Diesel Ignition and Combustion Model for Multidimensional Engine Simulation , 1995 .

[4]  R. Reitz,et al.  Effects of Injection Pressure and Nozzle Geometry on D.I. Diesel Emissions and Performance , 1995 .

[5]  Rolf D. Reitz,et al.  Mechanism of Soot and NOx Emission Reduction Using Multiple-injection in a Diesel Engine , 1996 .

[6]  Octavio Armas,et al.  Effect of the injection parameters of a common rail injection system on diesel combustion through thermodynamic diagnosis , 1999 .

[7]  Paul C. Miles,et al.  The Influence of Swirl on HSDI Diesel Combustion at Moderate Speed and Load , 2000 .

[8]  Rolf D. Reitz,et al.  Reducing Particulate and NOx Emissions by Using Multiple Injections in a Heavy Duty D.I. Diesel Engine , 1994 .

[9]  Wolfgang Cartellieri,et al.  The Impact of Emissions and Fuel Economy Requirements on Fuel Injection System and Noise of HD Diesel Engines , 1998 .

[10]  R. Reitz,et al.  Turbulence Modeling of Internal Combustion Engines Using RNG κ-ε Models , 1995 .

[11]  Christopher J. Rutland,et al.  Intake Flow Effects on Combustion and Emissions in a Diesel Engine , 1998 .

[12]  S. Orszag,et al.  Renormalization group analysis of turbulence. I. Basic theory , 1986 .

[13]  H. Hiroyasu,et al.  Models for combustion and formation of nitric oxide and soot in direct injection diesel engines. SAE Paper 760129 , 1976 .

[14]  Rolf D. Reitz,et al.  In-Cylinder Measurement and Modeling of Liquid Fuel Spray Penetration in a Heavy-Duty Diesel Engine , 1997 .

[15]  Steven L. Plee,et al.  Flame Temperature Correlation for the Effects of Exhaust Gas Recirculation on Diesel Particulate and NO x Emissions , 1981 .

[16]  Paul C. Miles,et al.  Modeling the Effects of EGR and Injection Pressure on Emissions in a High-Speed Direct-Injection Diesel Engine , 2001 .

[17]  José M. Desantes,et al.  Influence of the EGR Rate, Oxygen Concentration and Equivalent Fuel/Air Ratio on the Combustion Behaviour and Pollutant Emissions of a Heavy-Duty Diesel Engine , 2000 .

[18]  J. Nagle,et al.  OXIDATION OF CARBON BETWEEN 1000–2000°C , 1962 .

[19]  Masao Koike,et al.  A Study of Heat Rejection and Combustion Characteristics of a Low-temperature and Pre-mixed Combustion Concept Based on Measurement of Instantaneous Heat Flux in a Direct-Injection Diesel Engine , 2000 .

[20]  A. A. Amsden,et al.  KIVA-3V: A Block-Structured KIVA Program for Engines with Vertical or Canted Valves , 1997 .

[21]  Rolf D. Reitz,et al.  Reducing Particulate and NOx Using Multiple Injections and EGR in a D.I. Diesel , 1995 .

[22]  M. E. McCracken,et al.  Swirl-Spray Interactions in a Diesel Engine , 2001 .

[23]  Gerhard Ziegler,et al.  Common Rail System (CR-System) for Passenger Car DI Diesel Engines; Experiences with Applications for Series Production Projects , 1999 .

[24]  Nobuhiro Kondo,et al.  Emission Reduction Technologies Applied to High-Speed Direct Injection Diesel Engine , 1998 .