Smart Powertrain Lab. Effects of Pilot Injection Strategies on Spray Visualization and Combustion in a Direct Injection Compression Ignition Engine using DME and Diesel Jaehoon Jeong · SeJun Lee · Ocktaeck Lim University of Ulsan 7 th Asian DME Conference 16 -18 November, 2011 Toki Messe Niigata Convention Center, Niigata, Japan
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Smart Powertrain Lab.
Effects of Pilot Injection Strategies
on Spray Visualization and Combustion
in a Direct Injection
Compression Ignition Engine
using DME and Diesel
Jaehoon Jeong · SeJun Lee · Ocktaeck Lim University of Ulsan
7th Asian DME Conference
16 -18 November, 2011
Toki Messe Niigata Convention Center, Niigata, Japan
Smart Powertrain Lab.
▌INTRODUCTION
Contents
▌OBJECTIVES
▌EXPERIMENTAL SETUP
▪ Spray Experimental System
▪ Engine Experiment System
▌CONCLUSION
▌RESULTS
▪ Spray Experiment
▪ Engine Experiment
Smart Powertrain Lab.
▌INTRODUCTION
Contents
▌OBJECTIVES
▌EXPERIMENTAL SETUP
▪ Spray Experimental System
▪ Engine Experiment System
▌CONCLUSION
▌RESULTS
▪ Spray Experiment
▪ Engine Experiment
Smart Powertrain Lab.
DME Engine Characteristics
▪ Equal dynamic characteristic of diesel engine “The Experimental Study of Emission Characteristics and Fuel Efficiency for the Heavy-Duty DME Bus”, KSAE, submitted, 2011
▪ Almost Smoke-less Combustion “Improvement of Performance and Emission Gas Level of Dimethyl-Ether-Fueled Diesel Engine”, JSAE, 2005
▪ Improving the exhaust characteristic without after-treatment system “Potential of Fuel Stratification for Reducing Pressure Rise Rate in HCCI Engines fueled with DME/n-Butane”
▪ Good mixture formation & No wall wetting
▌Advantages
▌Disadvantages ▪ Low the fuel efficiency “Development of a Heavy-Duty DME Truck in EFV21 Project~Research and Development of DME Engine and Chassis”,SAE
paper 2005-03-0176, 2005
▪ Potential for high NOx emissions “Development of NOx storage reduction system for a dimethyl ether engine”,SAE paper 2004-01-1832, 2004
▪ Small low heating value compared to the diesel “The Performance of a Diesel Engine for Light Duty Truck Using a Jerk Type, In-Line DME Injection System”, SAE paper 2004-
01-1862, 2004
DME Engine Characteristics
▪ Equal dynamic characteristic of diesel engine “The Experimental Study of Emission Characteristics and Fuel Efficiency for the Heavy-Duty DME Bus”, KSAE, submitted, 2011
▪ Almost Smoke-less Combustion “Improvement of Performance and Emission Gas Level of Dimethyl-Ether-Fueled Diesel Engine”, JSAE, 2005
▪ Improving the exhaust characteristic without after-treatment system “Potential of Fuel Stratification for Reducing Pressure Rise Rate in HCCI Engines fueled with DME/n-Butane”
▪ Good mixture formation & No wall wetting
▌Advantages
▌Disadvantages ▪ Low the fuel efficiency “Development of a Heavy-Duty DME Truck in EFV21 Project~Research and Development of DME Engine and Chassis”,SAE
paper 2005-03-0176, 2005
▪ Potential for high NOx emissions “Development of NOx storage reduction system for a dimethyl ether engine”,SAE paper 2004-01-1832, 2004
▪ Small low heating value compared to the diesel “The Performance of a Diesel Engine for Light Duty Truck Using a Jerk Type, In-Line DME Injection System”, SAE paper 2004-
01-1862, 2004
Smart Powertrain Lab.
- Inner boundary of diffusion flame
: High temperature in combination with less available oxygen
Using DME fuel for smoke reduction : H. Teng and G. Regner, “Fuel Injection Strategy for Reducing NOx Emissions from Haevy-Duty Diesel Engines Fueled with DME”,
SAE 2006-01-3324, 2006
▌Smoke formation in CI engine
▌NOx formation in CI engine
- Premixed combustion / Outer boundary of diffusion flame
: Sudden combustion of over premixed fuel-air mixture with
high temperature
Applying Pilot–Main injection strategy for NOx reduction : K. Okude, K. Mori, S. Shiino, K. Yamada and Y. Matsumoto, “Effects of Multiple Injections on Diesel Emissions and
: Mitsuru Konno, Kazuki Chiba, and Takeshi Okamoto, “Experimental and Numerical Analysis of High Pressure DME Spray”, SAE,
2010-01-0880, 2010
DME Engine Characteristics
Smart Powertrain Lab.
- Inner boundary of diffusion flame
: High temperature in combination with less available oxygen
Using DME fuel for smoke reduction : H. Teng and G. Regner, “Fuel Injection Strategy for Reducing NOx Emissions from Haevy-Duty Diesel Engines Fueled with DME”,
SAE 2006-01-3324, 2006
▌Smoke formation in CI engine
▌NOx formation in CI engine
- Premixed combustion / Outer boundary of diffusion flame
: Sudden combustion of over premixed fuel-air mixture with
high temperature
Applying Pilot–Main injection strategy for NOx reduction : K. Okude, K. Mori, S. Shiino, K. Yamada and Y. Matsumoto, “Effects of Multiple Injections on Diesel Emissions and
DME injection Lower CO and THC emissions than diesel injection
Diesel
DME
Smart Powertrain Lab.
NOx-Smoke trade-off
▌NOx formation in CI engine
- Premixed combustion / Outer boundary of diffusion flame
: Sudden combustion of over premixed fuel-air mixture with
high temperature
Applying Pilot–main injection strategy for NOx reduction : K. Okude, K. Mori, S. Shiino, K. Yamada and Y. Matsumoto, “Effects of Multiple Injections on Diesel Emissions and
Combustion Characteristics”, SAE 2007-01-4178
- Inner boundary of diffusion flame
: High temperature in combination with less available oxygen
Using DME fuel for smoke reduction : H. Teng and G. Regner, “Fuel Injection Strategy for Reducing NOx Emissions from Haevy-Duty Diesel Engines Fueled with DME”,
SAE 2006-01-3324
▌Smoke formation in CI engine
Smart Powertrain Lab.
DME Engine Characteristics
▪ Equal dynamic characteristic of diesel engine “The Experimental Study of Emission Characteristics and Fuel Efficiency for the Heavy-Duty DME Bus”, KSAE, submitted, 2011
▪ Almost Smoke-less Combustion “Improvement of Performance and Emission Gas Level of Dimethyl-Ether-Fueled Diesel Engine”, JSAE, 2005
▪ Improving the exhaust characteristic without after-treatment system “Potential of Fuel Stratification for Reducing Pressure Rise Rate in HCCI Engines fueled with DME/n-Butane”
▪ Good mixture formation & No wall wetting because of Low boiling
point
▌Advantages
▌Disadvantages ▪ Low the fuel efficiency “Development of a Heavy-Duty DME Truck in EFV21 Project~Research and Development of DME Engine and Chassis”,SAE
paper 2005-03-0176, 2005
▪ Potential for high NOx emissions “Development of NOx storage reduction system for a dimethyl ether engine”,SAE paper 2004-01-1832, 2004
▪ Small low heating value compared to the diesel “The Performance of a Diesel Engine for Light Duty Truck Using a Jerk Type, In-Line DME Injection System”, SAE paper 2004-
01-1862, 2004
Smart Powertrain Lab.
NOx-Smoke trade-off
▌NOx formation in CI engine
- Premixed combustion / Outer boundary of diffusion flame
: Sudden combustion of over premixed fuel-air mixture with
high temperature
Applying Pilot–main injection strategy for NOx reduction : K. Okude, K. Mori, S. Shiino, K. Yamada and Y. Matsumoto, “Effects of Multiple Injections on Diesel Emissions and
Combustion Characteristics”, SAE 2007-01-4178
- Inner boundary of diffusion flame
: High temperature in combination with less available oxygen
Using DME fuel for smoke reduction : H. Teng and G. Regner, “Fuel Injection Strategy for Reducing NOx Emissions from Haevy-Duty Diesel Engines Fueled with DME”,
SAE 2006-01-3324
▌Smoke formation in CI engine
Smart Powertrain Lab.
DME Engine Characteristics
▪ Equal dynamic characteristic of diesel engine “The Experimental Study of Emission Characteristics and Fuel Efficiency for the Heavy-Duty DME Bus”, KSAE, submitted, 2011
▪ Almost Smoke-less Combustion “Improvement of Performance and Emission Gas Level of Dimethyl-Ether-Fueled Diesel Engine”, JSAE, 2005
▪ Improving the exhaust characteristic without after-treatment system “Potential of Fuel Stratification for Reducing Pressure Rise Rate in HCCI Engines fueled with DME/n-Butane”
▪ Good mixture formation & No wall wetting because of Low boiling
point
▌Advantages
▌Disadvantages ▪ Low the fuel efficiency “Development of a Heavy-Duty DME Truck in EFV21 Project~Research and Development of DME Engine and Chassis”,SAE
paper 2005-03-0176, 2005
▪ Potential for high NOx emissions “Development of NOx storage reduction system for a dimethyl ether engine”,SAE paper 2004-01-1832, 2004
▪ Small low heating value compared to the diesel “The Performance of a Diesel Engine for Light Duty Truck Using a Jerk Type, In-Line DME Injection System”, SAE paper 2004-