This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Vehicle Testing and Development Involving a Simplified Split Cooling with Integrated Exhaust Heat Recovery and Reuse
Technical Paper
2016-01-0647
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Additional fuel consumption reduction during the NEDC test cycle and real life driving can be effectively achieved by quickly raising the temperatures of the powertrain’s parts, oils and coolant closer to the optimal operating temperatures. In particular, the engine cooling system today must play a bigger role in the overall thermal management of the powertrain’s fluids and metals during warm-up, idle and severe operating conditions. In responding to these additional requirements, the previously proposed cost effective split cooling system has been further evolved to expedite the powertrain’s warming up process without compromising the overall heat rejection performance during severe operating conditions. In achieving these warming and cooling functions, the coolant flow rate in the cylinder head is almost stagnant when the single thermostat is closed and at its maximum when the thermostat is fully opened. In this context, the constantly flowing engine oil above the cylinder head’s water jacket can be warmed up and cooled by these differing coolant flow rates and temperatures. Unlike other conventional split cooling circuits, the coolant flow rate in the cylinder block is constantly flowing thus allowing heat transfers to take place between the recirculated coolant to the cabin heater and CVT oil heat exchanger. In speeding up the warming up process involving the CVT oil, additional heat is obtained from the exhaust gas via the turbocharger housing with reversible coolant flow. During the vehicle testing and development, the test vehicles were subjected to various tests and the temperatures of various powertrain fluids and metals were measured at various locations and compared with the baseline. From the tests conducted, the proposed cooling system significantly enhanced the thermal management efficiency and effectiveness of the vehicles while reducing the cost and complexity of the overall cooling system.
Recommended Content
Authors
Topic
Citation
Osman, A., Muhammad Yusof, M., and Rafi, M., "Vehicle Testing and Development Involving a Simplified Split Cooling with Integrated Exhaust Heat Recovery and Reuse," SAE Technical Paper 2016-01-0647, 2016, https://doi.org/10.4271/2016-01-0647.Also In
References
- Jehlik , F. , Wood , E. , Gonder , J. , and Lopp , S. Simulated Real-World Energy Impacts of a Thermally Sensitive Powertrain Considering Viscous Losses and Enrichment SAE Int. J. Mater. Manf. 8 2 239 250 2015 10.4271/2015-01-0342
- Zammit , J.P. , Shayler , P.J. , Pegg , I. Thermal coupling and energy flows between coolant, engine structure and lubricating oil during engine warm-up VTMS 10 Coventry, United Kingdom 2010
- Trapy , J. and Damiral , P. An Investigation of Lubricating System Warm-up for the Improvement of Cold Start Efficiency and Emissions of S.I. Automotive Engines SAE Technical Paper 902089 1990 10.4271/902089
- Group 23 Continuous Variable Transaxle, 2008 Mitsubishi Lancer Service Manual 23 11 2008
- Janowski , P. , Shayler , P.J. , Robinson , S. and Goodman , M. The effectiveness of heating parts of the powertrain to improve vehicle fuel economy during warm-up VTMS 10 2011
- 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
- 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 10.4271/2015-01-1650
- Guillemot , P. , Gatellier , B. , and Rouveirolles , P. The Influence of Coolant Temperature on Unburned Hydrocarbon Emissions from Spark Ignition Engine SAE Technical Paper 941962 1994 10.4271/941962
- Zammit , J.P. Managing engine thermal state to reduce friction losses during warm-up PhD Thesis University of Nottingham Nottingham 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
- Brace , C. , Burnham-Slipper , H. , Wijetunge , R. , Vaughan , N. et al. Integrated Cooling Systems for Passenger Vehicles SAE Technical Paper 2001-01-1248 2001 10.4271/2001-01-1248
- Kunze , K. , Wolff , S. , Lade , I. , and Tonhauser , J. A Systematic Analysis of CO2-Reduction by an Optimized Heat Supply during Vehicle Warm-up SAE Technical Paper 2006-01-1450 2006 10.4271/2006-01-1450
- 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
- Continental Supplies World’s First Turbocharger with Aluminum Turbine Housing in Cars http://www.continental-corporation.com/www/pressportal_com_en/themes/press_releases/3_automotive_group/powertrain/press_releases/pr_2014_07_15_turbocharger_en.html