This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Testing and Development of an Enhanced and Cost Effective Engine Split Cooling Circuit
Technical Paper
2015-01-1650
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The drive to reduce CO2 and fuel consumption from passenger cars requires improvements from various subsystems. In particular, the ever growing importance of effective and efficient thermal management will no doubt benefit the quest for more efficient vehicle. While many established automakers have decided to increase the sophistications of the engine cooling circuits through electronics, the increase in complexity and costs are still not desirable especially for A and B passenger car segments. With this in mind, simple mechanical based cooling systems with enhanced functionalities are in high demand. To meet such demand, a simplified engine split cooling circuit previously proposed, simulated and reported seems to be promising. To further verify the indicated advantages, a prototype unit was built and physically tested using a dynamometer with motoring capability. The test results obtained are encouraging with several distinctive advantages over the conventional serial and parallel cooling circuits. With low circuit pressure losses, the cabin heater can be placed in between the engine and radiator thus eliminating the need for as much as 40 LPM of coolant to be returned to the water pump to avoid flow stagnation. With a lot more coolant flow going to the radiator, the standard water pump pulley was replaced with a bigger one to reduce the flow rate and the pump's power consumption. Engine FMEP measured using motoring dynamometer showed reduction in power consumption across the engine speed. With higher flow rate and flow velocities across the cylinder head combined with lower coolant temperature inside the cylinder head, the knock resistance of the engine is improved significantly. Spark ignition timing sweep using RON 95 fuel has also shown significant spark advance potentials across the engine speed. The positive test results obtained so far have proven that the proposed simplified engine split cooling has a big potential to meet the demands of future engines.
Recommended Content
Authors
Topic
Citation
Osman, A., Hussin, M., and Zainal Abidin, S., "Testing and Development of an Enhanced and Cost Effective Engine Split Cooling Circuit," SAE Technical Paper 2015-01-1650, 2015, https://doi.org/10.4271/2015-01-1650.Also In
References
- Schwarz , C. , Schünemann , E. , Durst , B. , Fischer , J. et al. Potentials of the Spray-Guided BMW DI Combustion System SAE Technical Paper 2006-01-1265 2006 10.4271/2006-01-1265
- Osman , A. , Sabrudin , A. , Hussin , M. , and Bakri , Z. Design and Simulations of an Enhanced and Cost Effective Engine Split Cooling Concept SAE Technical Paper 2013-01-1640 2013 10.4271/2013-01-1640
- Clough , M. Precision Cooling of a Four Valve per Cylinder Engine SAE Technical Paper 931123 1993 10.4271/931123
- Baker , P.J. , Jenkins , M.D. , Wagner , St. , Ellinger , M. An Optimised Thermal Design and Development Process for Passenger Compartments of Vehicle 4 th European Automotive Simulation Conference Munich Germany 2009
- Osman , A. Interbore Cooling System United States Patent Office, US 6,776,127
- Laramee , R.S. , Garth , C. , Doleisch , Schneider , J. , Hauser , H. , Hagen , H. Visual Analysis and Exploration of Fluid Flow in a Cooling Jacket Visualization 2005 IEEE 623 630
- Jawad , B. , Zellner , K. , and Riedel , C. Small Engine Cooling and the Electric Water Pump SAE Technical Paper 2004-32-0084 2004 10.4271/2004-32-0084
- KOBAYASHI , H. , YOSHIMURA , K. , and HIRAYAMA , T. A study on dual circuit cooling for higher compression ratio SAE Technical Paper 841294 1984 10.4271/841294
- Fukuda , Y. , Tawa , H. , Makise , A. Increase of Knock Limit in Outboard Motor Through Employment of Dual Control Direct Cooling System Honda R&D Technical Review 16 1 2004
- Lodi , F.S. Reducing Cold Start Fuel Consumption Through Improved Thermal Management PhD. Thesis University of Melbourne 2008
- Gardiner , R. , Zhao , C. , Addison , J. , Shayler , P.J. The effects of thermal state changers on friction during the warm up of a spark ignition engine VTMS11 Conference May 2013
- Morita , A. , Hosoi , A. , Harada , T. , Uchida , M. , Kodama , Y. , Maegawa , H. Study of the vehicle thermal management focused on the engine lubricant oil VTMS11 Conference May 2013
- Zoz , S. , Strepek , S. , Wiseman , M. , and Qian , C. Engine Lubrication System Model for Sump Oil Temperature Prediction SAE Technical Paper 2001-01-1073 2001 10.4271/2001-01-1073
- Osman , A. Design Concept and Manufacturing Method of a Lightweight Deep Skirt Cylinder Block SAE Technical Paper 2012-01-0406 2012 10.4271/2012-01-0406
- Osman , A. Design and Development of a Compact and Lightweight Oil Pan for High Performance Vehicle Applications SAE Technical Paper 2014-01-1640 2014 10.4271/2014-01-1640
- Osman , A. Oil Scrubber for Engine United Kingdom Patent Office, GB 2402437