This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Advanced Thermal Management for Internal Combustion Engines - Valve Design, Component Testing and Block Redesign
Technical Paper
2006-01-1232
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Advanced engine cooling systems can enhance the combustion environment, increase fuel efficiency, and reduce tailpipe emissions with less parasitic engine load. The introduction of computer controlled electro-mechanical valves, radiator fans, and coolant pumps require mathematic models and real time algorithms to implement intelligent thermal control strategies for prescribed engine temperature tracking. Smart butterfly valves can replace the traditional wax-based thermostat to control the coolant flow based on both engine temperature and operating conditions. The electric water pump and radiator fan replace the mechanically driven components to reduce unnecessary engine loads at high speeds and provide better cooling at low speeds. However, implementation of electro-mechanical actuators including the alternator and electrical storage devices introduces inefficiencies in mechanical to electrical energy conversion (and electrical to mechanical energy conversion), which may require increased fuel consumption over pure mechanical components. Empirical models can provide realistic component data used in simulation tools during the development process, and also define the basis for cooling system control algorithms. In this paper, a general framework to derive these empirical models is investigated for thermal management systems where the engine temperature must be accurately controlled in both steady state and transient operation. The evolution of automotive cooling systems also requires a paradigm shift in the engine block design. The design changes include isolated cylinder water jackets, temperature sensor arrays, and distributed smart valves to enable distinct cylinder-by-cylinder temperature maintenance for optimum combustion. This paper explores the introduction of a ‘coolant rail’ to accommodate specific cylinder temperature control defined by an on-demand cylinder dependent cooling strategy.
Recommended Content
Topic
Citation
Chastain, J. and Wagner, J., "Advanced Thermal Management for Internal Combustion Engines - Valve Design, Component Testing and Block Redesign," SAE Technical Paper 2006-01-1232, 2006, https://doi.org/10.4271/2006-01-1232.Also In
References
- Visnic, B. “Thermostat, Thy Days are Numbered” Ward's AutoWorld 37 6 53 54 June 2001 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
- Luptowski B. Arici O. Johnson J. Parker G. “Development of the Enhanced Vehicle and Engine Cooling System Simulation and Application to Active Cooling Control” SAE Paper 2005-01-0697 2005
- Vagenas A. Hawley J. G. Brace C. J. Ward M. C. “On-Vehilce Controllable Cooling Jets” SAE Paper 2004-01-0049 2004
- Eberth J. Wagner J. Afshar B. Foster R. “Modeling and Validation of Automotive “Smart” Thermal Management System Architectures” SAE Paper 2004-01-0048 2004
- Chalgren R. Barron L. “Development and Verification of a Heavy Duty 42/14V Electric Powertrain Cooling System” SAE Paper 2003-01-3416 2003
- Chanfreau M. Gessier B. Farkh A. Geels P. Y. “The Need for an Electrical Water Valve in a THErmal Management Intelligent System (THEMIS ™ )” SAE Paper 2003-01-0274 2003
- Wagner J. Srinivasan V. Dawson D. M. Marotta E. E. “Smart Thermostat and Coolant Pump Control for Engine Thermal Management Systems” SAE Paper 2003-01-0272 2003
- Setlur P. Wagner J. Dawson D. Marotta E. “An Advanced Engine Thermal Management System: Nonlinear Control and Test” IEEE/ASME Transactions on Mechatronics 10 2 11 2005
- White F., Fluid Mechanics 5th McGraw-Hill New York 2003
- Allen D. J. Lasecki M. P. “Thermal Management Evolution and Controlled Coolant Flow” SAE Paper 2001-01-1732 2001