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Ramped Versus Square Injection Rate Experiments in a Heavy-Duty Diesel Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 14, 2020 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
CO2 regulations on heavy-duty transport are introduced in essentially all markets within the next decade, in most cases in several phases of increasing stringency. To cope with these mandates, developers of engines and related equipment are aiming to break new ground in the fields of combustion, fuel and hardware technologies. In this work, a novel diesel fuel injector, Delphi’s DFI7, is utilized to experimentally investigate and compare the performance of ramped injection rates versus traditional square fueling profiles. The aim is specifically to shift the efficiency and NOx tradeoff to a more favorable position. The design of experiments methodology is used in the tests, along with statistical techniques to analyze the data. Results show that ramped and square rates - after optimization of fueling parameters - produce comparable gross indicated efficiencies. Tests were carried out at 1200 and 1425 rpm; for the latter engine speed peak efficiency was attained at considerably lower NOx levels by applying a ramped injection rate. Particulate matter emissions, on the other hand, are generally lower with the use of square profiles. Heat release analysis further reveals that ignition delays in ramped rate operation are quite long, hinting at vastly different spray behavior. The relatively low loads applied in this work only sustain the delays further. Altogether, this causes the potential of the rate shaping capabilities to be underexploited, as direct control over the burn rate is limited with the combustion system used in this work. The results emphasize the need to carefully select ramp slopes for a particular engine geometry, load and speed point, and additional operating parameter settings.
CitationWillems, R., Willems, F., Simpson, T., Albrecht, B. et al., "Ramped Versus Square Injection Rate Experiments in a Heavy-Duty Diesel Engine," SAE Technical Paper 2020-01-0300, 2020, https://doi.org/10.4271/2020-01-0300.
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- Stanton, D.W. , “Systematic Development of Highly Efficient and Clean Engines to Meet Future Commercial Vehicle Greenhouse Gas Regulations,” SAE Technical Paper 2013-01-2421, 2013, doi:https://doi.org/10.4271/2013-01-2421.
- Johnson, T. and Joshi, A. , “Review of Vehicle Engine Efficiency and Emissions,” SAE Technical Paper 2017-01-0907, 2017, doi:https://doi.org/10.4271/2017-01-0907.
- Johnson, T. and Joshi, A. , “Review of Vehicle Engine Efficiency and Emissions,” SAE Int. J. Engines 11(6):1307-1330, 2018, doi:https://doi.org/10.4271/2018-01-0329.
- “The Volvo Group’s Wave Piston Design Lowers Fuel Consumption,” accessed via https://www.volvogroup.com/en-en/news/2016/jun/the-volvo-groups-wave-piston-design-lowers-fuel-consumption.html on August 12, 2019.
- “Turbo Technologies Recover Exhaust Gas Energy,” accessed via https://www.volvogroup.com/en-en/news/2017/jan/turbo-technologies-recover-exhaust-gas-energy.html on August 12, 2019.
- “New Trucks from Volvo Running on LNG Offer the Same Performance as Diesel, but with 20-100% Lower CO2 Emissions,” accessed via https://www.volvotrucks.com/en-en/news/press-releases/2017/oct/pressrelease-171003.html on August 12, 2019.
- Tuner, M. , “Review and Benchmarking of Alternative Fuels in Conventional and Advanced Engine Concepts with Emphasis on Efficiency, CO2, and Regulated Emissions,” SAE Technical Paper 2016-01-0882, 2016, doi:https://doi.org/10.4271/2016-01-0882.
- Graham, M., Crossley, S., Harcombe, T., Keeler, N. et al. , “Beyond Euro VI - Development of a Next Generation Fuel Injector for Commercial Vehicles,” SAE Technical Paper 2014-01-1435, 2014, doi:https://doi.org/10.4271/2014-01-1435.
- Ritter, D., Korkmaz, M., Pitsch, H., Abel, D., and Albin, T. , “Optimization-Based Fuel Injection Rate Digitalization for Combustion Rate Shaping,” in 2019 American Control Conference (ACC), 2019, 5103-5110.
- Chen, K. , “Simultaneous Reduction of NOx and Particulate Emissions by Using Multiple Injections in a Small Diesel Engine,” SAE Technical Paper 2000-01-3084, 2000, doi:https://doi.org/10.4271/2000-01-3084.
- Montgomery, D. and Reitz, R. , “Effects of Multiple Injections and Flexible Control of Boost and EGR on Emissions and Fuel Consumption of a Heavy-Duty Diesel Engine,” SAE Technical Paper 2001-01-0195, 2001, doi:https://doi.org/10.4271/2001-01-0195.
- Dronniou, N., Lejeune, M., Balloul, I., and Higelin, P. , “Combination of High EGR Rates and Multiple Injection Strategies to Reduce Pollutant Emissions,” SAE Technical Paper 2005-01-3726, 2005, doi:https://doi.org/10.4271/2005-01-3726.
- Vanegas, A., Won, H., Felsch, C., Gauding, M., and Peters, N. , “Experimental Investigation of the Effect of Multiple Injections on Pollutant Formation in a Common-Rail DI Diesel Engine,” SAE Technical Paper 2008-01-1191, 2008, doi:https://doi.org/10.4271/2008-01-1191.
- Hotta, Y., Inayoshi, M., Nakakita, K., Fujiwara, K. et al. , “Achieving Lower Exhaust Emissions and Better Performance in an HSDI Diesel Engine with Multiple Injection,” SAE Technical Paper 2005-01-0928, 2005, doi:https://doi.org/10.4271/2005-01-0928.
- Gambhir, H., Barman, J., and Patchappalam, K. , “Experimental Investigation on the Effect of Pilot and Post Injection on Engine Performance and Emissions,” SAE Technical Paper 2018-28-0015, 2018, doi:https://doi.org/10.4271/2018-28-0015.
- O’Connor, J. and Musculus, M. , “Post Injections for Soot Reduction in Diesel Engines: A Review of Current Understanding,” SAE Int. J. Engines 6(1):400-421, 2013, doi:https://doi.org/10.4271/2013-01-0917.
- Martin, J., Sun, C., Boehman, A., and O’Connor, J. , “Experimental Study of Post Injection Scheduling for Soot Reduction in a Light-Duty Turbodiesel Engine,” SAE Technical Paper 2016-01-0726, 2016, doi:https://doi.org/10.4271/2016-01-0726.
- Desantes, J., Arrègle, J., Javier López, J., and García, A. , “A Comprehensive Study of Diesel Combustion and Emissions with Post-injection,” SAE Technical Paper 2007-01-0915, 2007, doi:https://doi.org/10.4271/2007-01-0915.
- Ganser, M. , “Common Rail Injector with Injection Rate Control,” SAE Technical Paper 981927, 1998, doi:https://doi.org/10.4271/981927.
- Mohan, B., Yang, W., and Chou, S. , “Fuel Injection Strategies for Performance Improvement and Emissions Reduction in Compression Ignition Engine - A Review,” Renew. Sust. Energy Reviews 28:664-676, 2013, doi:10.1016/j.rser.2013.08.051.
- Desantes, J.M., Benajes, J., Molina, S., and González, C.A. , “The Modification of the Fuel Injection Rate in Heavy-Duty Diesel Engines. Part 1: Effects on Engine Performance and Emissions,” Appl. Thermal Eng. 24:2701-2714, 2004, doi:10.1016/j.applthermaleng.2004.05.003.
- Desantes, J.M., Benajes, J., Molina, S., and González, C.A. , “The Modification of the Fuel Injection Rate in Heavy-Duty Diesel Engines. Part 2: Effects on Combustion,” Appl. Thermal Eng. 24:2715-2726, 2004, doi:10.1016/j.applthermaleng.2004.05.004.
- Kohketsu, S., Tanabe, K., and Mori, K. , “Flexibly Controlled Injection Rate Shape with Next Generation Common Rail System for Heavy Duty DI Diesel Engines,” SAE Technical Paper 2000-01-0705, 2000, doi:https://doi.org/10.4271/2000-01-0705.
- Coldren, D., Schuricht, S., and Smith, R. , “Hydraulic Electronic Unit Injector with Rate Shaping Capability,” SAE Technical Paper 2003-01-1384, 2003, doi:https://doi.org/10.4271/2003-01-1384.
- Christian, R., Knopf, F., Jaschek, A., and Schindler, W. , “Eine Neue Messmethodik der Bosch-zahl mit Erhöhter Empfindlichkeit,” MTZ 54:16-22, 1993.
- Box, G., Hunter, J., and Hunter, W. , Statistics for Experimenters: Design, Innovation and Discovery 2nd Edition (Wiley, 2005).
- De Cuyper, T., Demuynck, J., Broekaert, S., and De Paepe, M. , “Heat Transfer in Premixed Spark Ignition Engines Part II: Systematic Analysis of the Heat Transfer Phenomena,” Energy 116:851-860, 2016, doi:10.1016/j.energy.2016.10.032.
- Tanabe, K., Kohketsu, S., and Nakayama, S. , “Effect of Fuel Injection Rate Control on Reduction of Emissions and Fuel Consumption in a Heavy Duty Diesel Engine,” SAE Technical Paper 2005-01-0907, 2005, doi:https://doi.org/10.4271/2005-01-0907.