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Engine-in-the-Loop Testing for Evaluating Hybrid Propulsion Concepts and Transient Emissions - HMMWV Case Study
Technical Paper
2006-01-0443
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper describes a test cell setup for concurrent running of a real engine and a vehicle system simulation, and its use for evaluating engine performance when integrated with a conventional and a hybrid electric driveline/vehicle. This engine-in-the-loop (EIL) system uses fast instruments and emission analyzers to investigate how critical in-vehicle transients affect engine system response and transient emissions. Main enablers of the work include the highly dynamic AC electric dynamometer with the accompanying computerized control system and the computationally efficient simulation of the driveline/vehicle system. The latter is developed through systematic energy-based proper modeling that tailors the virtual model to capture critical powertrain transients while running in real time. Coupling the real engine with the virtual driveline/vehicle offers a chance to easily modify vehicle parameters, and even study two different powertrain configurations. In particular, the paper describes the engine-in-the-loop study of a V8, 6L engine coupled to a virtual 4×4 High-Mobility Multipurpose Wheeled Vehicle (HMMWV). The results shed light on critical transients in a conventional powertrain and their effect on NOx and soot emissions. Next, the conventional HMMWV powertrain is replaced with a parallel hybrid electric configuration and two power management strategies are examined. Comparison of the conventional and hybrid propulsion options provides detailed insight into fuel economy emissions tradeoffs at the vehicle level.
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Authors
- Zoran Filipi - Automotive Research Center, University of Michigan
- Hosam Fathy - Automotive Research Center, University of Michigan
- Jonathan Hagena - Automotive Research Center, University of Michigan
- Alexander Knafl - Automotive Research Center, University of Michigan
- Rahul Ahlawat - Automotive Research Center, University of Michigan
- Jinming Liu - Automotive Research Center, University of Michigan
- Dohoy Jung - Automotive Research Center, University of Michigan
- Dennis N. Assanis - Automotive Research Center, University of Michigan
- Huei Peng - Automotive Research Center, University of Michigan
- Jeffrey Stein - Automotive Research Center, University of Michigan
Topic
Citation
Filipi, Z., Fathy, H., Hagena, J., Knafl, A. et al., "Engine-in-the-Loop Testing for Evaluating Hybrid Propulsion Concepts and Transient Emissions - HMMWV Case Study," SAE Technical Paper 2006-01-0443, 2006, https://doi.org/10.4271/2006-01-0443.Also In
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