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Development and Implementation of a Common Rail Fuel Injection System for Flexible Combustion for an Experimental Medium Duty Diesel Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 28, 2017 by SAE International in United States
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In order to advance the current research engine to operate in advanced combustion modes such as reactivity controlled compression ignition RCCI a diesel common rail fuel injection system for the experimental research engine has been designed and developed through testing the hydraulic, electrical and electronics, mechanical subcomponents, and the controls strategies. This study presents the process taken based on the verification and validation model of design and development for the fuel injection system incorporating hardware-in-the-loop (HIL) testing prior to engine operation and subsequent engine validation. Software verification was completed through signal converting circuits to confirm precise injection timing and to test the system in a mean effective model to incorporate a PI speed controller along with consistent rail pressure. Initial operation of the common rail system integrated on the direct injected single-cylinder medium duty engine resulted in flexible combustion schemes with various injection timings and split patterns at a constant speed of 1500 RPM and 4.2 IMEP. Swept injection timing was tested from single pulses at 8°, 15°, and 22° before top dead center (BTDC) to multiple pulses starting at 60° BTDC. The original injection was at 15° BTDC and by delaying the timing to 8° BTDC, in-cylinder pressure reduced from 71 bar to 53 bar and the AHRR (apparent heat release rate) peaks decreased from 160 J/CAD to 70 J/CAD when comparing single pulse common rail events. These changes reduced NOx emissions by 98% but in turn dramatically increased soot and unburned hydrocarbons by over 10 times. Multi-pulse injection was also tested with 30% of mass injected at 60° BTDC and 70% at 8° and 22° BTDC. The AHRR displayed cool flames at 24° BTDC along with a reduced peak at 35 J/CAD and prolonged diffusion burn. These are preliminary results on a continually growing research engine. A port fuel injector (PFI) is also introduced into the intake manifold to conduct tests in RCCI mode with alternative fuels such as various Fischer Tropsch fuels and n-butanol.
The spray pattern of the new piezoelectric injector was modeled to investigate the relation with excessive soot production. The results show that the new spray pattern impinges on the cylinder head with high levels of wall wetting and film formation resulting in a slow oxidation process with increased unburned hydrocarbons, and for these reasons a custom injector is being designed to resolve this issue. The new injection system and associated controls implementation of this system allows a flexible injection scheme and combustion phasing control nevertheless, the calibration is continuing including harmonization with the EGR and supercharger systems.
CitationSoloiu, V., Gaubert, R., Muinos, M., Moncada, J. et al., "Development and Implementation of a Common Rail Fuel Injection System for Flexible Combustion for an Experimental Medium Duty Diesel Engine," SAE Technical Paper 2017-01-0790, 2017, https://doi.org/10.4271/2017-01-0790.
Data Sets - Support Documents
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- Schuette, H. and Ploeger, M., "Hardware-in-the-Loop Testing of Engine Control Units - A Technical Survey," SAE Technical Paper 2007-01-0500, 2007, doi:10.4271/2007-01-0500.
- Riedel, A. and Schmidt, A., "Testing Control Systems of Trucks and Truck-Trailer-Combinations With Hardware In The Loop - Very Real Tests In a Virtual World," SAE Technical Paper 2001-01-2768, 2001, doi:10.4271/2001-01-2768.
- Consiglio, J. and Delagrammatikas, G., "A Cost-Effective Engine-in-the-Loop Powertrain Testing System," SAE Technical Paper 2010-01-0192, 2010, doi:10.4271/2010-01-0192.
- Jiang, S., Medonza, D., and Kitchen, J., "A Flexible Hardware-in-the-Loop Testing System for Hybrid Powertrain," SAE Technical Paper 2015-01-0586, 2015, doi:10.4271/2015-01-0586.
- Nabi, S., Balike, M., Allen, J., and Rzemien, K., "An Overview of Hardware-In-the-Loop Testing Systems at Visteon," SAE Technical Paper 2004-01-1240, 2004, doi:10.4271/2004-01-1240.
- Buratti, R., Imarisio, R., and Peters, B., "Experiences with Common Rail, a Technology Changing the Image of Diesels in Europe," SAE Technical Paper 2004-28-0072, 2004, doi:10.4271/2004-28-0072.
- Bhadani, N., "Concept of Virtual Engine Control Module for High Quality and Time Efficient Verification and Testing of Powertrain Engine Control Module," SAE Technical Paper 2015-01-0170, 2015, doi:10.4271/2015-01-0170.
- Splitter, D., Hanson, R., Kokjohn, S., and Reitz, R., "Reactivity Controlled Compression Ignition (RCCI) Heavy-Duty Engine Operation at Mid-and High-Loads with Conventional and Alternative Fuels," SAE Technical Paper 2011-01-0363, 2011, doi:10.4271/2011-01-0363.
- Kokjohn, S., Hanson, R., Splitter, D., Kaddatz, J. et al., "Fuel Reactivity Controlled Compression Ignition (RCCI) Combustion in Light- and Heavy-Duty Engines," SAE Int. J. Engines 4(1):360-374, 2011, doi:10.4271/2011-01-0357.
- Soloiu, V., Muinos, M., and Harp, S., "Investigation of Dual Fuel PCCI (PFI of n-Butanol and DI-ULSD) Compared with DI of Binary Mixtures of the Same Fuels in an Omnivorous Diesel Engine," SAE Technical Paper 2015-01-0857, 2015, doi:10.4271/2015-01-0857.
- Nehmer, D. and Reitz, R., "Measurement of the Effect of Injection Rate and Split Injections on Diesel Engine Soot and NOx Emissions," SAE Technical Paper 940668, 1994, doi:10.4271/940668.
- Tow, T., Pierpont, D., and Reitz, R., "Reducing Particulate and NOx Emissions by Using Multiple Injections in a Heavy Duty D.I. Diesel Engine," SAE Technical Paper 940897, 1994, doi:10.4271/940897.
- Kokjohn, S., Hanson, R., Splitter, D., Reitz, R., "Fuel reactivity controlled compression ignition (RCCI): a pathway to controlled high-efficiency clean combustion," Int. J. of Engine Research, 12:209-226, 2011, doi: 10.1177/1468087411401548.
- Badami, M., Mallamo, F., Millo, F., and Rossi, E., "Influence of Multiple Injection Strategies on Emissions, Combustion Noise and BSFC of a DI Common Rail Diesel Engine," SAE Technical Paper 2002-01-0503, 2002, doi:10.4271/2002-01-0503.
- Oki, M., Matsumoto, S., Toyoshima, Y., Ishisaka, K. et al., "180MPa Piezo Common Rail System," SAE Technical Paper 2006-01-0274, 2006, doi:10.4271/2006-01-0274.
- Benajes, J., Molina, S., and García, J., "Influence of Pre- and Post-Injection on the Performance and Pollutant Emissions in a HD Diesel Engine," SAE Technical Paper 2001-01-0526, 2001, doi:10.4271/2001-01-0526.
- DieselNet, “European Stationary Cycle (ESC),” https://www.dieselnet.com//standards/cycles/esc.php, accessed Dec. 20, 2016.
- Hanson, R., Kokjohn, S., Splitter, D., and Reitz, R., "An Experimental Investigation of Fuel Reactivity Controlled PCCI Combustion in a Heavy-Duty Engine," SAE Int. J. Engines 3(1):700-716, 2010, doi:10.4271/2010-01-0864. Benajes, J., Molina, S., García, A., and Monsalve-Serrano, J., "Effects of direct injection timing and blending ratio on RCCI combustion with different low reactivity fuels," Energy Conversion and Management 99:193-209, 2015, doi:10.1016/j.enconman.2015.04.046
- Reitz, R., and Kokjohn, S., “Comparison of Conventional Diesel Reactivity Controlled Compression Ignition (RCCI) Combustion in a Light-Duty Engine,” Presentation at 2012 Directions in Engine-Efficiency and Emissions Research (DEER), Oct. 2012.
- Benajes, J., Molina, S., García, A., and Monsalve-Serrano, J., "Effects of direct injection timing and blending ratio on RCCI combustion with different low reactivity fuels," Energy Conversion and Management 99:193-209, 2015, doi:10.1016/j.enconman.2015.04.046
- Soloiu, V., Rivero-Castillo, A., Muinos, M., Duggan, M. et al., "Simultaneous Reduction of NOX and Soot in a Diesel Engine through RCCI Operation with PFI of n-butanol and DI of Cottonseed Biodiesel," SAE Technical Paper 2014-01-1322, 2014, doi:10.4271/2014-01-1322.
- Eng, J., "Characterization of Pressure Waves in HCCI Combustion," SAE Technical Paper 2002-01-2859, 2002, doi:10.4271/2002-01-2859.
- Kim, J., Park, S., Andrie, M., Reitz, R. et al., "Experimental Investigation of Intake Condition and Group-Hole Nozzle Effects on Fuel Economy and Combustion Noise for Stoichiometric Diesel Combustion in an HSDI Diesel Engine," SAE Int. J. Engines 2(1):1054-1067, 2009, doi:10.4271/2009-01-1123.
- National Instruments Inc, “NI Software Calibration Manager Toolkit for LabVIEW,” sine.ni.com, accessed July 2015.
- Control Soft Inc., “PID Loop Tuning Pocket Guide Version 2.0,” www.controlglobal.com, accessed July 2015.
- Malvern Instruments Ltd., 'Spraytec User Manual,’ Malvern, Worcestershire: 69-420, 2006.
- Dec, J. and Yang, Y., "Boosted HCCI for High Power without Engine Knock and with Ultra-Low NOx Emissions - using Conventional Gasoline," SAE Int. J. Engines 3(1):750-767, 2010, doi:10.4271/2010-01-1086.
- Borman, G., Nishiwaki, K., 1987, “Internal-Combustion Engine Heat Transfer”, Prog Energy Combust Sci, Vol. 13 1-46.
- Soloiu, V., Weaver, J., 2013 “Cotton Seed FAME Combustion and Emissions Research in a DI Diesel Engine”.