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Coolant Flow Control Strategies for Automotive Thermal Management Systems
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 04, 2002 by SAE International in United States
Annotation ability available
The automotive thermal management system is responsible for maintaining engine and passenger compartment temperatures, which promote normal combustion events and passenger comfort. This system traditionally circulates a water ethylene glycol mixture through the engine block using a belt-driven water pump, wax pellet thermostat valve, radiator with electric fan, and heater core. Although vehicle cooling system performance has been reliable and acceptable for many decades, advances in mechatronics have permitted upgrades to powertrain and chassis components. In a similar spirit, the introduction of a variable speed electric water pump and servo-motor thermostat valve allows ECU-based thermal control. This paper examines the integration of an electric water pump and intelligent thermostat valve to satisfy the engine's basic cooling requirements, minimize combustion chamber fluctuations due to engine speed changes, and permit quick heating of a cold block. A controller architecture is introduced to regulate the operation of these two components. A series of mathematical models are presented to describe the dc servo-motor actuated thermostat valve, electric water pump, and thermal behavior of in-cylinder engine components. The multiple node resistor-capacitor engine model estimates the thermal behavior of the cylinder wall and cylinder head for use in the model-based control algorithm. Representative results are presented and discussed to investigate the performance of the proposed control strategy in regulating the thermal management system for various operating speeds.
CitationWagner, J., Ghone, M., Dawson, D., and Marotta, E., "Coolant Flow Control Strategies for Automotive Thermal Management Systems," SAE Technical Paper 2002-01-0713, 2002, https://doi.org/10.4271/2002-01-0713.
- Allen, D. J. Lasecki, M. P. “Thermal Management Evolution and Controlled Coolant Flow” SAE paper no. 2001-01-1732 2001
- Bohac, S. V. Baker, D. M. Assanis, D. N. “A Global Model for Steady State and Transient S.I. Engine Heat Transfer Studies” SAE paper no. 960073 1996
- Couetouse, H. Gentile, D. “Cooling System Control in Automotive Engines” SAE paper no. 920788 1992
- Crouse, W. H. Anglin, D. L. Automotive Engines McGraw Hill NY 1981
- Einaudi, G. Mortara, W. “Engine Cooling Electronic Control System” SAE paper no. 885085 1988
- Heywood, J. Internal Combustion Engine Fundamentals McGraw-Hill NY 1988
- Hnatczuk, W. Lasecki, M. P. Bishop, J. Goodell, J. “Parasitic Loss Reduction for 21 st Century Trucks” SAE paper no. 2000-01-3423 2000
- Kenny, A. A. Bradshaw, C. F. Creed, B. T. “Electronic Thermostat System for Automotive Engines” SAE paper no. 880265 1988
- Melzer, F. Hesse, U. Rocklage, G. Schmitt, M. “Thermomanagement” SAE paper no. 1999-01-0238 1999
- Taylor, C. F. Toong, T. Y. “Heat Transfer in Internal Combustion Engines” ASME paper 57-HT 17 1957
- Visnic, B. “Thermostat, Thy Days are Numbered” Wards AutoWorld 37 6 53 54 June 2001
- Wagner, J. Paradis, I. Marotta, E. Dawson, D. “Enhanced Automotive Engine Cooling Systems - A Mechatronics Approach” International Journal of Vehicle Design 28 1 2 3 214 240 2002
- Wagner, J. R. Marotta, E. E. Paradis, I. “Thermal Modeling of Engine Components for Temperature Predictions and Fluid Flow Regulation” SAE paper no. 2001-01-1014 2001
- Xu, Z. Johnson, J. H. Chiang, E. C. “A Simulation Study of a Computer Controlled Cooling System for a Diesel Powered Truck” SAE paper no. 841711 1984
- Xu, Z. Johnson, J. H. Chiang, E. C. “The Design and Testing of a Computer-Controlled Cooling System for a Diesel Powered Truck” SAE paper no. 841712 1984
- Yoo, I. K. Simpson, K. Bell, M. Majkowski, S. “An Engine Coolant Temperature Model and Application for Cooling System Diagnosis” SAE paper no. 2000-01-0939 2000
- Zou, X. Jordan, J. A. Shillor, M. “A Dynamic Model for a Thermostat” Journal of Engineering Mathematics 36 291 310 1999