This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Fuel Economy Improvement During Cold Start Using Recycled Exhaust Heat and Electrical Energy for Engine Oil and ATF Warm-Up
Technical Paper
2014-01-0674
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
A numerical study is conducted to investigate the effect of changing engine oil and automatic transmission fluid (ATF) temperatures on the fuel economy during warm-up period. The study also evaluates several fuel economy improving devices that reduce the warm-up period by utilizing recycled exhaust heat or an electric heater. A computer simulation model has been developed using a multi-domain 1-D commercial software and calibrated using test data from a passenger vehicle equipped with a 2.4 / 4-cylinder engine and a 6-speed automatic transmission. The model consists of sub-models for driver, vehicle, engine, automatic transmission, cooling system, engine oil circuit, ATF circuit, and electrical system.
The model has demonstrated sufficient sensitivity to the changing engine oil and ATF temperatures during the cold start portion of the Federal Test Procedure (FTP) driving cycle that is used for the fuel economy evaluation. The results from the study indicate that the potential fuel economy improvement during the driving cycle is 7.3 % at 24°C ambient temperature, and 20.1 % at −6.7°C. An electric ATF heater and two heat exchangers that recycle exhaust gas to heat ATF or engine oil have been evaluated in terms of fuel economy improvement. The study has discovered that the exhaust ATF heater has the greatest impact on the fuel economy during the warm-up period. According to the simulation results, the improvements are 2.1 % at 24°C ambient temperature, and 7.2 % at −6.7°C.
Recommended Content
Authors
Topic
Citation
Lee, B., Jung, D., Myers, J., Kang, J. et al., "Fuel Economy Improvement During Cold Start Using Recycled Exhaust Heat and Electrical Energy for Engine Oil and ATF Warm-Up," SAE Technical Paper 2014-01-0674, 2014, https://doi.org/10.4271/2014-01-0674.Also In
References
- Cho , H. , Jung , D. , Filipi Z. , Assanis , D. , Vanderslice , J. , and Bryzik , W. Application of Controllable Electric Coolant Pump for Fuel Economy and Cooling Performance Improvement Journal of Engineering for Gas Turbines and Power JANUARY 2007 129 239 244
- Hnatczuk , W. , Lasecki , M. , Bishop , J. , and Goodell , J. Parasitic Loss Reduction for 21st Century Trucks SAE Technical Paper 2000-01-3423 2000 10.4271/2000-01-3423
- Cortona , E. and Onder , C. Engine Thermal Management with Electric Cooling Pump SAE Technical Paper 2000-01-0965 2000 10.4271/2000-01-0965
- Wagner , J. R. , Paradis , L. , Marotta , E. E. , and Dawson , D. Enhanced Automotive Engine Cooling systems-A Mechatronics Approach Int. J. of Veh. Des. 28 1/2/3 214 240 2004
- Wagner , J. , Srinivasan , V. , Dawson , D. , and Marotta , E. Smart Thermostat and Coolant Pump Control for Engine Thermal Management Systems SAE Technical Paper 2003-01-0272 2003 10.4271/2003-01-0272
- Setlur , P. , Wagner , J. , Dawson D. , and Marotta E. An Advanced Engine Thermal Management System: Nonlinear Control and Test IEEE/ASME Transactions on Mechatronics 10 2 APRIL 2005
- Page , R. , Hnatczuk , W. , and Kozierowski , J. Thermal Management for the 21st Century - Improved Thermal Control & Fuel Economy in an Army Medium Tactical Vehicle SAE Technical Paper 2005-01-2068 2005 10.4271/2005-01-2068
- Tao , D. , Malec , R. , and Adams , T. Waste Heat Management For Improved Passenger Compartment Heating SAE Technical Paper 885029 1988 10.4271/885029
- Diehl , P. , Haubner , F. , Klopstein , S. , and Koch , F. Exhaust Heat Recovery System for Modern Cars SAE Technical Paper 2001-01-1020 2001 10.4271/2001-01-1020
- Latz , G. , Andersson , S. , and Munch , K. Comparison of Working Fluids in Both Subcritical and Supercritical Rankine Cycles for Waste-Heat Recovery Systems in Heavy-Duty Vehicles SAE Technical Paper 2012-01-1200 2012 10.4271/2012-01-1200
- Teng , H. , Klaver , J. , Park , T. , Hunter , G. et al. A Rankine Cycle System for Recovering Waste Heat from HD Diesel Engines - WHR System Development SAE Technical Paper 2011-01-0311 2011 10.4271/2011-01-0311
- Kuze , Y. , Kobayashi , H. , Ichinose , H. , and Otsuka , T. Development of New Generation Hybrid System (THS II) - Development of Toyota Coolant Heat Storage System SAE Technical Paper 2004-01-0643 2004 10.4271/2004-01-0643
- Lee , J. , Ohn , H. , Choi , J. , Kim , S. et al. Development of Effective Exhaust Gas Heat Recovery System for a Hybrid Electric Vehicle SAE Technical Paper 2011-01-1171 2011 10.4271/2011-01-1171
- Leong , D. , Shayler , P. , Pegg , I. , and Murphy , M. Characterizing the Effect of Viscosity on Friction in the Piston Assembly of Internal Combustion Engines Proc. IMechE Vol. 221 Part J: J. Engineering Tribology 2007
- 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