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Knock Mitigation by Means of Coolant Control
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 9, 2019 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
The possibility to mitigate the knock onset by means of a controlled coolant flow rate is investigated. The study is carried out on a small displacement, N.A. 4-valve per cylinder SI engine. The substitution of the standard belt-driven pump with an electrically driven one allows the variation of the coolant flow rate regardless of engine speed and permits, therefore, the adoption of a controlled coolant flow rate. The first set of experimental tests aims at evaluating the engine operating condition and the coolant flow rate, which are more favorable to the knock onset. Starting from this condition, subsequent experimental tests are carried out for transient engine operating conditions, by varying the coolant flow rates and evaluating, therefore, its effects on cylinder pressure fluctuations. In all the experiments, the spark advance and the equivalence ratio are controlled by the ECU according to the production engine map. The results show that the effects of coolant flow rate on in-cylinder pressure fluctuations are not negligible and the implementation of a predictive controller for the management of the coolant flow rate can be adopted for mitigating knock by limiting, therefore, the use of more fuel consuming strategies.
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- Iwashita, Y., Kanda, M., Hartagiri, H., and Yokoi, Y. , “Improvement of Coolant Flow for Reducing Knock,” in I. Mech. E. Autoitech Conference, 1989.
- Finlay, I.C., Tugwell, W., Biddulp, T., and Marshall, R.A. , “The Influence of Coolant Temperature on the Performance of a Four Cylinder 1100cc Engine Employing a Dual Circuit Cooling System,” Heat and Mass Transfer in Gasoline and Diesel Engine, 1989.
- Russ, S. , “A Review of the Effect of Engine Operating Conditions on Borderline Knock,” SAE Technical Paper 960497 , 1996, doi:10.4271/960497.
- Hoppe, F., Thewes, M., Baumgarten, H., and Dohmen, J. , “Water Injection for Gasoline Engines: Potentials, Challenges, and Solutions,” Int J Eng Res 17(1):86-96, 2016, doi:10.1177/1468087415599867.
- Soyelmez, M.S. and Ozcan, H. , “Water Injection Effects on the Performance of Four Cylinder, LPG Fuelled SI Engine,” Open Access Sci Rep 2:591-593, 2013.
- Busuttil, D. and Farrugia, M. , “Experimental Investigation on the Effect of Injecting Water to the Air to Fuel Mixture in a Spark Ignition Engine,” MM (Mod Mach) Sci J 1:585-590, 2015.
- Francqueville, L. and Michel, J. , “On the Effects of EGR on Spark-Ignited Gasoline Combustion at High Load,” SAE Int J Eng 7(4):1808-1823, 2014, doi:10.4271/2014-01-2628.
- Potteau, S., Lutz, P., Leroux, S., Moroz, S. et al. , “Cooled EGR for a Turbo SI Engine to Reduce Knocking and Fuel Consumption,” SAE Technical Paper 2007-01-3978 , 2007, doi:10.4271/2007-01-3978.
- Alger, T., Chauvet, T., and Dimitrova, Z. , “Synergies between High EGR Operation and GDI Systems,” SAE Int J Eng 1(1):101-114, 2008.
- Lee, S., Park, S., Kim, C., Kim, Y.M. et al. , “Comparative Study on EGR and Lean Burn Strategies Employed in an SI Engine Fueled by Low Calorific Gas,” Appl Energy 129:10-16, 2014, doi:10.1016/j.apenergy.2014.04.082.
- Lattimore, T., Wang, C., Xu, H., Wyszynski, M.L., and Shuai, S. , “Investigation of EGR Effect on Combustion and PM Emissions in a DISI Engine,” Appl Energy 161:256-267, 2016, doi:10.1016/j.apenergy.2015.09.080.
- Wei, H., Zhu, T., Shu, G., Tan, L., and Wang, Y. , “Gasoline Engine Exhaust Gas Recirculation a Review,” Appl Energy 99:534-544, 2012, doi:10.1016/j.apenergy.2012.05.011.
- Bozza, F., De Bellis, V., and Teodosio, L. , “Potentials of Cooled EGR and Water Injection for Knock Resistance and Fuel Consumption Improvements of Gasoline Engines,” Appl Energy 169:112-125, 2016, doi:10.1016/j.apenergy.2016.01.129.
- Castiglione, T., Rovense, F., Algieri, A., and Bova, S. , “Powertrain Thermal Management for CO2 Reduction,” SAE Technical Paper 2018-37-0020 , 2018, doi:10.4271/2018-37-0020.
- Pizzonia, F., Castiglione, T., and Bova, S. , “A Robust Model Predictive Control for Efficient Thermal Management of Internal Combustion Engines,” Appl Energy 169:555-566, 2016, doi:10.1016/j.apenergy.2016.02.063.
- Piccione, R. and Bova, S. , “Engine Rapid Shutdown: Experimental Investigation on the Cooling System Transient Response,” J. Eng. Gas Turbines Power 132(7):072801, 2010, doi:10.1115/1.4000262.
- Bova, S., Piccione, R., Durante, D., and Perrussio, M. , “Experimental Analysis of the after-Boiling Phenomenon in a Small I.C.E,” SAE Technical Paper 2004-32-0091 , 2004, doi:10.4271/2004-32-0091.
- Xiaofeng, G., Stone, R., Hudson, C., and Bradbury, I. , “The Detection and Quantification of Knock in Spark Ignition Engines,” SAE Technical Paper 932759 , 1993, doi:10.4271/932759.
- Livengood, J. C. and Wu, P.C. , “Correlation of Autoignition Phenomena in Internal Combustion Engines and Rapid Compression Machines,” in 5th Symp. (Int.) on Combustion, 1995, 347-356, Reinhold Publ. Corp..
- Bova, S., Castiglione, T., Piccione, R., and Pizzonia, F. , “A Dynamic Nucleate-Boiling Model for CO2 Reduction in Internal Combustion Engines,” Appl Energ. 143:271-282, 2015, doi:10.1016/j.apenergy.2015.01.047.
- Heywood, J. B. , Internal Combustion Engine Fundamentals Second Edition (McGraw-Hill, 2018).