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Energy Efficiency Benefits of Active Transmission Warm-up under Real-World Operating Conditions
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 03, 2018 by SAE International in United States
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Active transmission warm-up systems are used by automotive manufacturers in effort to increase powertrain efficiency and decrease fuel consumption. These systems vary from one manufacturer to another, but their main goal is to capture waste heat from the powertrain and accelerate transmission fluid warm-up. In this study, the fuel consumption benefit from the active transmission warm-up system in a 2013 Ford Taurus 2.0 L EcoBoost is quantified on a cold start UDDS drive cycle at ambient temperatures of −7 and 21 °C. In addition to this, the fuel consumption and greenhouse gas emissions impact on the EPA 5-cycle test, hot start HWY drive cycle, and a cold start, constant speed drive cycle is also quantified. An extra effort to determine the maximum possible benefit of active transmission warm-up is made by modifying the test vehicle to provide external heating to pre-heat and further accelerate the transmission fluid warm-up. The cold start fuel consumption benefit with external pre-heating of the transmission fluid is quantified on a UDDS and constant speed drive cycle at an ambient temperature of −7 °C. Finally, the cold start fuel consumption impact of using cabin heat to warm up the interior of the vehicle is quantified on a UDDS drive cycle at −7 °C and its magnitude is compared to the fuel consumption benefits of the active transmission warm-up system.
CitationIliev, S. and Lohse-Busch, H., "Energy Efficiency Benefits of Active Transmission Warm-up under Real-World Operating Conditions," SAE Technical Paper 2018-01-0385, 2018, https://doi.org/10.4271/2018-01-0385.
Data Sets - Support Documents
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- U.S. Federal Register, Environmental Protection Agency, Department of Transportation, National Highway Traffic Safety Administration “2017 and Later Model Year Light-Duty Vehicle Greenhouse Gas Emissions and Corporate Average Fuel consumption Standards, Final Rule,” http://www.gpo.gov/fdsys/pkg/FR-2012-10-15/pdf/2012-21972.pdf.
- U.S. Department of Energy and U.S. Environmental Protection Agency , “Fuel consumption Tests: Detailed Test Information,” http://www.fueleconomy.gov/feg/fe_test_schedules.shtml.
- Argonne National Laboratory, Transportation Technology R&D Center , “Advanced Powertrain Research Facility (APRF),” http://www.anl.gov/energy-systems/facilities/advanced-powertrain-research-facility.
- Jehlik, F., Iliev, S., Wood, E., and Gonder, J. , “Investigation of Transmission Warming Technologies at Various Ambient Conditions,” SAE Technical Paper 2017-01-0157 , 2017, doi:https://doi.org/10.4271/2017-01-0157.
- Semel, R.R. , “Fuel Economy Improvements through Improved Automatic Transmission Warmup-Stand Alone Oil to Air (OTA) Transmission Cooling Strategy with Thermostatic Cold Flow Bypass Valve,” SAE Technical Paper 2001-01-1760 , 2001, doi:https://doi.org/10.4271/2001-01-1760.
- 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, doi:https://doi.org/10.4271/2006-01-1450.
- Lee, J., Ohn, J., 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, doi:https://doi.org/10.4271/2011-01-1171.
- 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, doi:10.4271/2014-01-0674.
- Farrant, P.E., Robertson, A., Joyce, S., and Hartland, J. , “The Application of Thermal Modelling to an Engine and Transmission to Improve Fuel Consumption Following a Cold Start,” SAE Technical Paper 2005-01-2038 , 2005, doi:10.4271/2005-01-2038.