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Numerical Simulation of the Warm-Up of a Passenger Car Diesel Engine Equipped with an Advanced Cooling System
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 05, 2016 by SAE International in United States
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The target for future cooling systems is to control the fluid temperatures and flows through a demand oriented control of the engine cooling to minimize energy demand and to achieve comfort, emissions, or service life advantages.
The scope of this work is to create a complete engine thermal model (including both cooling and lubrication circuits) able to reproduce engine warm up along the New European Driving Cycle in order to assess the impact of different thermal management concepts on fuel consumption. The engine cylinder structure was modeled through a finite element representation of cylinder liner, piston and head in order to simulate the cylinder heat exchange to coolant or oil flow circuits and to predict heat distribution during transient conditions. Heat exchanges with other components (EGR cooler, turbo cooler, oil cooler) were also taken into account. The thermal model was indirectly integrated with the engine model to evaluate the heat generated by the combustion process: the combustion gas temperatures and convective heat exchange coefficients between gas and walls were obtained from the results of detailed engine model simulation. The main advantage of this approach is the lower computational time in comparison with direct integration. The cooling system analyzed in this work presents some innovative technologies in terms of thermal-management, such as a controlled water pump (Switchable Water Pump) and an electronically controlled thermostat. Through the simulation, it was therefore possible to assess the impact of different control strategies of the cooling system control. In particular, it was possible to evaluate solutions capable to control the engine warm up, in order to reduce the fuel consumption and increase the overall efficiency of the engine during the driving cycle.
CitationMillo, F., Caputo, S., Cubito, C., Calamiello, A. et al., "Numerical Simulation of the Warm-Up of a Passenger Car Diesel Engine Equipped with an Advanced Cooling System," SAE Technical Paper 2016-01-0555, 2016, https://doi.org/10.4271/2016-01-0555.
- Arici, O., Johnson, J., Kulkarni, A., "The Vehicle Engine Cooling System Simulation Part 1 - Model Development," SAE Technical Paper 1999-01-0240, 1999, doi:10.4271/1999-01-0240.
- Nessim, W. and Zhang, F., “Powertrain Warm-up Improvement using Thermal Management Systems,” International Journal of Scientific & Technology Research, May 2012.
- Torregrosa, A. J., Broatch, A., Olmeda, P., Romero, C., "Assessment of the influence of different cooling system configurations on engine warm-up, emissions and fuel consumption," Internal Journal of Automotive Technology, August 2008, Vol. 9, No. 4, pp. 447-458, doi:10.1007/s12239-008-0054-1. doi:10.4271/2013-01-1115.
- Cipollone, R., Villante, C., "A Fully Transient Model For Advanced Engine Thermal Management," SAE Technical Paper 2005-01-2059, 2005, doi:10.4271/2005-01-2059.
- Cipollone, R. and Di Battista, D., Gualtieri, A., Massimi, M., "Development of Thermal Modeling in Support of Engine Cooling Design," SAE Technical Paper 2013-24-0090, 2013, doi:10.4271/2013-24-0090.
- GT-SUITE Cooling Systems and Thermal Management Applications Manual, Gamma Technologies, 2014
- Klopstein, S., Lauer, S., and Maassen, F., "Interpretation Tools and Concepts for the Heat Management in the Drive Train of the Future," SAE Technical Paper 2011-01-0650, 2011, doi:10.4271/2011-01-0650.
- Iskandar, M. A. and Filho, A. A., “Design and analysis of a cooling control system of a diesel engine, to reduce emissions and fuel consumption,” ABCM Symposium Series in Mechatronics, 2012.
- Seider, G., Mehring, J. and Weber, C., “A High-Resolution Warm-Up Simulation Model for a Gasoline Engine with Advanced Thermal Control,” Vehicle Thermal Management Systems Conference and Exhibition, May 2011.
- Sangeorzan, B., Barber, E., and Hinds, B., "Development of a One-Dimensional Engine Thermal Management Model to Predict Piston and Oil Temperatures," SAE Technical Paper 2011-01-0647, 2011, doi:10.4271/2011-01-0647.
- Lahuerta, J., Samuel, S., "Numerical Simulation of Warm-Up Characteristics and Thermal Management of a GDI Engine," SAE Technical Paper 2013-01-0870, 2013, doi:10.4271/2013-01-0870.
- Pirotais, F., Bellettre, J. and Le Corre, O., Tazerout, M. et al., "A Diesel Engine Thermal Transient Simulation: Coupling Between a Combustion Model and a Thermal Model," SAE Technical Paper 2003-01-0224, 2003, doi:10.4271/2003-01-0224.
- Kitanoski, F., Puntigam, W., Kozek, M., and Hager, J., "An Engine Heat Transfer Model for Comprehensive Thermal Simulations," SAE Technical Paper 2006-01-0882, 2006, doi:10.4271/2006-01-0882.
- Luptowski, B., Arici, O., Johnson, J., and Parker, G., "Development of the Enhanced Vehicle and Engine Cooling System Simulation and Application to Active Cooling Control," SAE Technical Paper 2005-01-0697, 2005, doi:10.4271/2005-01-0697.
- Millo, F., Di Lorenzo, G., Servetto, E., Capra, A. et al., "Analysis of the Performance of a Turbocharged S.I. Engine under Transient Operating Conditions by Means of Fast Running Models," SAE Int. J. Engines 6(2):968-978, 2013,
- Luff, D., Law, T., Shayler, P., and Pegg, I., "The Effect of Piston Cooling Jets on Diesel Engine Piston Temperatures, Emissions and Fuel Consumption," SAE Int. J. Engines 5(3):1300-1311, 2012, doi:10.4271/2012-01-1212.