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Impacts of WLTP Test Procedure on Fuel Consumption Estimation of Common Electrified Powertrains
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 02, 2019 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
The new European test procedure, called the worldwide harmonized light vehicle test procedure (WLTP), deviates in some details from the current NEDC-based test which will have an impact on the determination of the official EU fuel consumption values for the new vehicles. The adaptation to the WLTP faces automakers with new challenges for meeting the stringent EU fuel consumption and CO2 emissions standards. This paper investigates the main changes that the new test implies to a mid-size sedan electrified vehicle design and quantifies their impact on the vehicles fuel economy. Three common electrified powertrain architectures including series, parallel P2, and powersplit are studied. A Pontryagin’s Minimum Principle (PMP) optimization-based energy management control strategy is developed to evaluate the energy consumption of the electrified vehicles in both charge-depleting (CD) and charge-sustaining (CS) modes. The results show that across different electrified vehicle architectures, the vehicles’ fuel economy using the WLTP cycle in CS mode substantially decreases compared to the NEDC cycle. Moreover, in CD mode, the battery needs to deliver more power in WLTP cycle compared to the NEDC to meet electric-only range requirement.
CitationSolouk, A., Kapadia, J., Masterson, B., and Shakiba-herfeh, M., "Impacts of WLTP Test Procedure on Fuel Consumption Estimation of Common Electrified Powertrains," SAE Technical Paper 2019-01-0306, 2019, https://doi.org/10.4271/2019-01-0306.
Data Sets - Support Documents
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- http://wltpfacts.eu/from-nedc-to-wltp-change/, visited on Dec. 2018.
- Kim, N., Cha, S., and Peng, H., “Optimal Control of Hybrid Electric Vehicles Based on Pontryagin's Minimum Principle,” IEEE Transactions on Control Systems Technology 19(5):1279-1287, 2011.
- Solouk, A., Shakiba-Herfeh, M., and Mahdi, S., “Analysis and Control of a Torque Blended Hybrid Electric Powertrain with a Multi-Mode LTC-SI Engine,” SAE Int. J. Alt. Power. 6(1):54-67, 2017, doi:10.4271/2017-01-1153.
- Solouk, A., Tripp, J., Shakiba-Herfeh, M., and Shahbakhti, M., “Fuel Consumption Assessment of a Multi-Mode Low Temperature Combustion Engine as Range Extender for an Electric Vehicle,” Energy Conversion and Management 148:1478-1496, 2017.
- Zaremba, A.T., Soto, C., Shakiba-Herfeh, M., and Jennings, M., “Power Management of Hybrid Electric Vehicles Based on Pareto Optimal Maps,” SAE Int. J. Alt. Power. 3(1):56-63, 2014, doi:10.4271/2014-01-1820.
- Solouk, A. and Shahbakhti, M., “Modeling and Energy Management of an HCCI Based Powertrain for Series Hybrid and Extended Range Electric Vehicles,” Int. J. Powertrains 6(2):226-258, 2017.
- Solouk, A. and Shahbakhti, M., “Energy Optimization and Fuel Economy Investigation of a Series Hybrid Electric Vehicle Integrated with Diesel/RCCI Engines,” Energies 9(12):1020, 2016.
- Solouk, A., Shakiba-Herfeh, M., and Shahbakhti, M., “Analysis and Control of a Torque Blended Hybrid Electric Powertrain with a Multi-Mode LTC-SI Engine,” SAE Int. J. Alt. Power. 6(1):54-67, 2017, doi:10.4271/2017-01-1153.
- Solouk, A., Shakiba-Herfeh, M., Arora, J., and Shahbakhti, M., “Fuel Consumption Assessment of an Electrified Powertrain with a Multi-Mode High-Efficiency Engine in Various Levels of Hybridization,” Energy Conversion and Management 155:100-115, 2018.
- Solouk, A. et al., “Fuel Economy Benefits of Integrating a Multi-Mode Low Temperature Combustion (LTC) Engine in a Series Extended Range Electric Powertrain,” SAE Technical Paper 2016-01-2361, 2016, doi:10.4271/2016-01-2361.