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Cleaner Diesel Using Model-Based Design and Advanced Aftertreatment in a Student Competition Vehicle
Technical Paper
2008-01-0868
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Traditionally in the United States, Diesel engines have negative connotations, primarily due to their association with heavy duty trucks, which are wrongly characterized as “dirty.” Diesel engines are more energy efficient and produce less carbon dioxide than gasoline engines, but their particulate and NOx emissions are more difficult to reduce than spark ignition engines. To tackle this problem, a number of after-treatment technologies are available, such as Diesel Lean NOx Traps (LNTs)), which reduces oxides of nitrogen, and the Diesel particulate filter (DPF), which reduces particulate matter. Sophisticated control techniques are at the heart of these technologies, thus making Diesel engines run cleaner. Another potentially unattractive aspect of Diesel engines is noise. The hybridization of a Diesel powertrain also offers significant opportunities for reducing noise emissions through the use of a starter-alternator for active engine vibration and noise reduction and by aggressively using engine start-stop and electric launch features.
Ohio State University used Model-Based Design in MATLAB and Simulink to address the challenge of integrating a Diesel engine in a crossover SUV as part of the Challenge X student competition. The team developed a number of advanced control strategies to meet vehicle technical specifications and validated these on the vehicle through real world tests. Challenge X is a four year competition, currently in its fourth year, that challenges 17 universities to re-engineer a Chevrolet Equinox for reduced energy consumption and emissions, while maintaining or improving stock performance.
The Ohio State University chose an architecture that utilizes a 1.9 L Diesel engine belted to a 10.6 kW starter/alternator and coupled to a six-speed automatic transmission. In addition, a larger 67 kW electric motor drives the rear axle in order to enable electric all wheel drive (eAWD) and electric launch capability. The Ohio State Team is currently fine tuning their vehicle to reduce emissions and improve drivability; this paper captures their experiences in this process.
Authors
- Mike Arnett - The Ohio State University 2007 Challenge X Team
- Kerem Bayar - The Ohio State University 2007 Challenge X Team
- Courtney Coburn - The Ohio State University 2007 Challenge X Team
- Yann Guezennec - The Ohio State University 2007 Challenge X Team
- Kerem Koprubasi - The Ohio State University 2007 Challenge X Team
- Shawn Midlam-Mohler - The Ohio State University 2007 Challenge X Team
- Kris Sevel - The Ohio State University 2007 Challenge X Team
- Mohammad Shakiba-Herfeh - The Ohio State University 2007 Challenge X Team
- Giorgio Rizzoni - The Ohio State University 2007 Challenge X Team
Topic
Citation
Arnett, M., Bayar, K., Coburn, C., Guezennec, Y. et al., "Cleaner Diesel Using Model-Based Design and Advanced Aftertreatment in a Student Competition Vehicle," SAE Technical Paper 2008-01-0868, 2008, https://doi.org/10.4271/2008-01-0868.Also In
References
- OSU Challenge X Team “Vehicle Architecture Selection for the Challenge X Competition,” Ohio State University 2004
- Paganelli, G. et al. “General Supervisory Control Policy for the Energy Optimization of Charge-Sustaining Hybrid Electric Vehicles.” Journal of SAE of Japan 22 2001
- Musardo, C. Staccia, B. “Energy Management Strategies for Hybrid Electric Vehicles.” Politecnico de Milano 2004
- Midlam-Mohler, S. Guezennec “Modeling of a Partial Flow Diesel, Lean NOx Trap System” Proc. of IMECE '05 Paper IMECE 2005-80834 Orlando, FL November 2005
- Midlam-Mohler, S. Guezennec “Design, Modelling, and Validation of a Flame Reformer for LNT External By-Pass Regeneration” SAE 2006-01-1367 2006
- Coburn, Courtney “Closed-loop Regeneration Scheduling of a Bifurcated Lean NOX Trap System with by-pass Regeneration” Master of Science Thesis The Ohio State University, Mechanical Engineering Department 2006