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Refinement and Testing of an E85 Split Parallel EREV
Technical Paper
2012-01-1196
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The Hybrid Electric Vehicle Team of Virginia Tech (HEVT) is participating in the 2009 - 2011 EcoCAR: The NeXt Challenge Advanced Vehicle Technology Competition series organized by Argonne National Lab (ANL), and sponsored by General Motors Corporation (GM), and the U.S. Department of Energy (DOE). Following GM's Vehicle Development Process (VDP), HEVT established team goals that meet or exceed the competition requirements for EcoCAR in the design of a plug-in extended range hybrid electric vehicle. The competition requires participating teams to re-engineer a stock crossover utility vehicle donated by GM. The result of this design process is an Extended Range Electric Vehicle (EREV) that uses grid electric energy and E85 fuel for propulsion. The vehicle design has achieved an SAE J1711 utility factor corrected fuel consumption of 2.9 L(ge)/100 km (82 mpgge) with an all-electric range of 87 km (54 miles) [1]. Using E85 fuel (corn-based in North America for the 2015 timeframe), the well-to-wheels petroleum energy use and greenhouse gas emissions are reduced by 91% and 18% respectively when compared to the stock 4-cylinder gasoline-fueled vehicle.
In year 2 of EcoCAR, HEVT focused on the integration of components, while year 3 was focused on refinements. The integration and refinements of years 2 and 3 were focused on meeting the Vehicle Technical Specifications (VTS) established at the beginning of the design process in year 1. This paper will detail the refinements made to the VTREX, explain why the changes were made, and describe the improvements or tradeoffs that had to be made for the vehicle to run reliably. Vehicle test data will be presented from year 2 competition, year 3 competition, dynamometer testing and on-road testing around the Virginia Tech campus. These test results will illustrate how the changes in powertrain components, mechanical integration and controls logic helped the vehicle to meet its target specifications. The test results will also show how accurately the simulations and models that were used to form the VTS matched real world performance.
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Alley, R., King, J., Gantt, L., Walsh, P. et al., "Refinement and Testing of an E85 Split Parallel EREV," SAE Technical Paper 2012-01-1196, 2012, https://doi.org/10.4271/2012-01-1196.Also In
References
- SAE International Surface Vehicle Recommended Practice “Recommended Practice for Measuring the Exhaust Emissions and Fuel Economy of Hybrid-Electric Vehicles, Including Plug-in Hybrid Vehicles,” SAE Standard J1711 June 2010
- Powertrain Systems Analysis Toolkit (PSAT) http://www.transportation.anl.gov/software/PSAT/index.html
- Brinkman, T. Weber Wang, M. Darlington, T. 2005 “Well-to-Wheels Analysis of Advanced Fuel/Vehicle Systems - A North American Study of Energy Use, Greenhouse Gas Emissions, and Criteria Pollutant Emissions” ANL
- EcoCAR Rules, Draft 4/1/2010 ANL
- Gantt, L. Alley, R. Bennett, J. Walsh, P. et al. “Development and Validation of an E85 Split Parallel E-REV,” SAE Technical Paper 2011-01-0912 2011 10.4271/2011-01-0912
- Walsh, P. Nelson, D. “Plug-in Hybrid Electric Vehicle Supervisory Control Strategy Considerations for Engine Exhaust Emissions and Fuel Use.” MS Thesis Virginia Polytechnic Institute and State University 2011
- Gantt, L. Alley, R. Perkins, D. Nelson, D. 2011 “Regenerative Brake Analysis for the VT REX Plug-in Hybrid Electric Vehicle.” IEEE VPPC Chicago, Il, USA