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MAHLE Modular Hybrid Powertrain for Large Passenger Cars and Light Commercial Vehicles
Technical Paper
2022-37-0012
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Vehicle manufacturers are experiencing a shift in legislation and customer attitudes towards powertrain technologies. To support the pathway towards net-zero emissions by 2050, technologies that significantly reduce CO2 emissions will be needed. This will require increasing levels of electrification, and in the areas of compact cars and urban transportation, the adoption of pure battery electric powertrains is expected to become the dominant technology. For large passenger cars and light commercial vehicles (LCVs) meeting all customer requirements, including range, payload, towing capability, and purchase cost with a pure electric vehicle is challenging and requires the use of heavy and expensive battery packs, which have a high embedded CO2 content.
The study builds on the work previously presented on the MAHLE modular hybrid powertrain (MMHP) concept and examines the suitability of this powertrain configuration to meet the future needs of large passenger cars and LCVs. In the MMHP concept, the full dynamic performance of the vehicle is provided by the electric traction motor, along with the ability to drive in pure-electric mode with a reduced battery capacity (and a reduced range) using the plug-in capability. On long journeys, or when charging is not available, drive can be supplemented, and battery state-of-charge maintained, through use of a compact, highly efficient dedicated hybrid engine.
The paper also presents the latest test results from our 3-cylinder dedicated hybrid engine, running on both conventional 95 RON gasoline and alternative sustainable low-carbon fuels. The engine concept features a combination of the pre-chamber-based combustion layout, high geometric compression ratio, cooled exhaust gas recirculation (EGR) and aggressive Miller-cycle operation, to enable high brake thermal efficiency levels to be achieved. Finally, drive-cycle analysis, based on engine test results, will also be used to show the efficiency of the entire powertrain system in these applications, based on the different fuels used.
Authors
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Citation
Harrington, A., Bassett, M., Cooper, A., and Blaxill, H., "MAHLE Modular Hybrid Powertrain for Large Passenger Cars and Light Commercial Vehicles," SAE Technical Paper 2022-37-0012, 2022, https://doi.org/10.4271/2022-37-0012.Also In
References
- Bassett , M. , Reynolds , I. , Cooper , A. , Reader , S. et al. MAHLE Modular Hybrid Powertrain Proceedings from the 28th Aachen Colloquium 2019
- Bassett , M. , Cooper , A. , Reynolds , I. , Hall , J. et al. MAHLE Modular Hybrid Powertrain IMechE, Internal Combustion Engines and Powertrain Systems for Future Transport 2019
- Cooper , A. , Harrington , A. , Bassett , M. , Reader , S. et al. Application of the Passive MAHLE Jet Ignition System and Synergies with Miller Cycle and Exhaust Gas Recirculation SAE Technical Paper 2020-01-0283 2020 https://doi.org/10.4271/2020-01-0283
- Bassett , M. , Cooper , A. , Harrington , A. , Pates , D. et al. Passive MAHLE Jet Ignition System Demonstrator Proceedings from the 28th Aachen Colloquium 2020
- UNECE 1995 http://www.unece.org/fileadmin/DAM/trans/main/wp29/wp29regs/2015/R101r3e.pdf
- UNECE 2021 https://unece.org/sites/default/files/2021-08/R154e.pdf
- United State Environmental Protection Agency https://www.epa.gov/emission-standards-reference-guide/epa-federal-test-procedure-ftp
- André , M. , Keller , M. , Sjödin , Å. , Gadrat , M. et al. The Artemis European Tools for Estimating the Pollutant Emissions from Road Transport and their Application in Sweden and France 17th International Conference Transport and Air Pollution Graz 2008
- Bassett , M. , Fraser , N. , Brooks , T. , Taylor , G. et al. A Study of Fuel Converter Requirements for an Extended-Range Electric Vehicle SAE Int. J. Engines 3 1 2010 631 654 https://doi.org/10.4271/2010-01-0832
- Warth , M. , Bassett , M. , Hall , J. , Taylor , G. et al. Development of a Compact-Class Range Extended Electric Vehicle 21st Aachen Colloquium Automobile and Engine Technology 2012
- Bassett , M. , Brods , B. , Hall , J. , Borman , S. et al. GPS Based Energy Management Control for Plug-In Hybrid Vehicles SAE Technical Paper 2015-01-1226 2015 https://doi.org/10.4271/2015-01-1226
- Patterson , J. , Alexander , M. , and Gurr , A. 2 2011 http://www.lowcvp.org.uk/assets/reports/RD11_124801_4%20-%20LowCVP%20-%20Life%20Cycle%20CO2%20Measure%20-%20Final%20Report.pdf
- Bolin , L. 2020 https://www.polestar.com/dato-assets/11286/1600176185-20200915polestarlcafinala.pdf
- https://www.eea.europa.eu/data-and-maps/daviz/co2-emission-intensity-6#tab-googlechartid_googlechartid_googlechartid_googlechartid_chart_11111