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This paper describes development of a test cell setup for concurrent running of a real engine and a simulation of the vehicle system, and its use for investigating highly-dynamic engine-in-vehicle operation and its effect on diesel engine emissions. Running an engine in the test cell under conditions experienced in the vehicle enables acquiring detailed insight into dynamic interactions between power train sub-systems, and the impact of it on fuel consumption and transient emissions. This type of data may otherwise be difficult and extremely costly to obtain from a vehicle prototype test. In particular, engine system response during critical transients and the effect of transient excursions on emissions are investigated using advanced, fast-response test instrumentation and emissions analyzers. 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 different power train configurations. In particular, the paper describes the engine-in-the-loop study of a V-8, 6l engine coupled to a virtual 4´4 off road vehicle. This engine is considered as a high-performance option for this truck and the real prototype of the complete vehicle does not exist yet. The results shed light on critical transients in a conventional powertrain and their effect on NOx and soot emissions. Measurements demonstrate very large spikes of particulate concentration at the initiation of vehicle acceleration events. Characterization of transients and their effect on particulate emission provides a basis for devising engine-level or vehicle level strategies, and direct guidance for developing drive-by-wire systems and/or hybrid supervisory control.
PAPER REVISED: 2007-12-07
PAPER ACCEPTED: 2008-02-08
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  1. Ciesla, C. R., Jennings, M. J., A Modular Approach to Powertrain Modeling and Shift Quality Analysis, SAE paper 950419, Special publication SP-1080, 1995
  2. Assanis, D., et. al.,Validation and Use of Simulink Integrated, High Fidelity, Engine-In-Vehicle Simulation of the International Class VI Truck, SAE technical paper 2000-01-0288, 2000
  3. Filipi, Z., et. al.,Combined Optimization of Design and Power Management of the Hydraulic Hybrid Propulsion System for the 6?6 Medium Truck, International Journal of Heavy Vehicle Systems, 11 (2004), 3/4, pp. 371-401
  4. Filipi, Z., Wang, Y., Assanis, D.,Variable Geometry Turbine (VGT) Strategies for Improving Diesel Engine In-Vehicle Response - a Simulation Study, International Journal of Heavy Vehicle Systems, 11 (2004), 3/4, pp. 303-326
  5. Fluga, E. C., Modeling of the Complete Vehicle Powertrain Using ENTERPRISE, SAE paper 931179, 1993
  6. Lin, C-C., et. al., Modeling and Control for a Medium-Duty Hybrid Electric Truck, International Journal of Heavy Vehicle Systems, 11 (2004), 3/4, pp. 349-370
  7. Lin, C., et. al., Integrated, Feed-Forward Hybrid Electric Vehicle Simulation in SIMULINK and its Use for Power Management Studies, SAE technical paper 2001-01-1334, 2001
  8. Wu, B., et. al., Optimal Power Management for a Hydraulic Hybrid Delivery Truck, Journal of Vehicle System Dynamics, 42 (2004), 1-2, pp. 23-40
  9. Rousseau, A., Sharer, P., Pasquier, M., Validation Process of a HEV System Analysis Model: PSAT, SAE paper 2001-01-0953, 2001
  10. Shidore, N., Pasquier, M., Interdependence of System Control and Component Sizing for a Hydrogen-Fueled Hybrid Vehicle, SAE paper 2005-01-3457, 2005
  11. Kim, H. M., et. al., Target Cascading in Vehicle Redesign: A Class VI Truck Study, International Journal of Vehicle Design, 29 (2002), 3, pp. 199-225
  12. Hong, S.-Ch., Rutland, C., Reitz, R., Development of an Integrated Spray and Combustion Model for Diesel Simulations, SAE paper 2001-30-0012, 2001
  13. Hong, S., Assanis, D., Wooldridge, M., Multi-Dimensional Modeling of NO and Soot Emissions with Detailed Chemistry and Mixing in a Direct Injection Natural Gas Engine, SAE paper 2002-01-1112, 2002
  14. Nabi, S., et. al., An Overview of Hardware-In-the-Loop Testing Systems at Visteon, SAE paper 2004-01-1240, 2004
  15. Jason, T. C., Moskwa, J. J., A Hardware-in-the-Loop Transient Diesel Engine Test System for Control and Diagnostic Development, Proceedings, ASME International Mechanical Engineering Congress and Exposition, New York, USA, 2001
  16. Fleming, M., Len, G., Stryker, P., Design and Construction of a University-Based Hybrid Electric Powertrain Test Cell, SAE paper 2000-01-3106, 2000
  17. ***, Diesel Hybridization and Emissions, Argonne National Laboratory Center for Transportation Research, Report to DOE from the ANL Vehicle Systems and Fuels Team, available at, in paper from U.S. Department of Energy, Office of Scientific and Technical Information, P.O. Box 62, Oak Ridge, Tenn., USA, 37831-0062
  18. Louca, L. S., Yildir, U. B., Modeling and Reduction Techniques for Studies of Integrated Hybrid Vehicle Systems, Proceedings, 4th International Symposium on Mathematical Modeling, Vienna, Austria, 2003
  19. Louca, L., Stein, J., Rideout, D., Generating Proper Integrated Dynamic Models for Vehicle Mobility Using a Bond Graph Formulation, Society for Computer Simulation, Phoenix, Ariz., USA, 2001
  20. Sendur, P., et. al., A Model Accuracy and Validation Algorithm, Proceedings, 2002 ASME International Mechanical Engineering Congress and Exposition, New Orleans, La., USA, 2002
  21. Filipi, Z., et. al., Engine-in-the-Loop Testing for Evaluating Hybrid Propulsion Concepts and Transient Emissions - HMMWV Case Study, SAE paper 2006-01-0443, SAE Transactions, Journal of Commercial Vehicles, also presented 2006 SAE World Congress, Detroit, Mich., USA, 2006, pp. 23-41
  22. Kokkolaras, et. al., Design under Uncertainty and Assessment of Performance Reliability for a Dual-Use Medium Truck with Hydraulic-Hybrid Powertrain and Fuel Cell Auxiliary Power Unit, SAE Paper 2005-01-1396; SAE Transactions, Journal of Passenger Cars: Mechanical Systems, Warrendale, Penn., USA, 2005, pp.1651-1660
  23. Kozaki, T., et. al., Balancing the Speed and Fidelity of Automotive Powertrain Models Through Surrogation, Proceedings, ASME International Mechanical Engineering Congress and Exposition, 2004, Anaheim, Cal., USA, 2004, pp. 249-258
  24. Karnopp, D. C., Margolis, D. L., Rosenberg, R. C., System Dynamics: Modeling and Simulation of Mechatronic Systems, 3rd ed., John Wiley & Sons, New York, USA, 2000
  25. Hrovat, D., Tobler, W. F., Bond Graph Modeling and Computer Simulation of Automotive Torque Converters, Journal of the Franklin Institute, 319 (1985), 12, pp. 93-114
  26. Louca, L. S., Stein, J. L., Energy-Based Model Reduction of Linear Systems, Proceedings, International Conference on Bond Graph Modeling and Simulation, San Francisco, Cal., USA, 1999
  27. Fathy, H. K., Ahlawat, R., Stein, J. L., Proper Powertrain Modeling for Engine-in-the-Loop Simulation, Proceedings, ASME International Mechanical Engineering Congress and Exposition, 2005, Orlando, Fl., USA, 2005, pp. 1195-1201
  28. ***, 20SIM, 20SIM Pro User's Manual. The University of Twente-Controllab Products B.V. Enschede, The Netherlands, 1999
  29. Babbit, G. R., Moskwa, J. J., Implementation Details and Test Results for a Transient Engine Dynamometer and Hardware in the Loop Vehicle Model, Proceedings, IEEE International Symposium on Computer-Aided Control System Design, Hawaii, USA, 1999, pp. 569-574
  30. Franklin, G. F., Powell, J. D., Emami-Naeini, A., Feedback Control of Dynamic Systems, 3rd ed., Addison-Wesley, Reading, Mass., USA, 1994
  31. Skogestad, S., Postlethwaite, I., Multivariable Feedback Control: Analysis and Design, John Wiley & Sons, New York, USA, 1997
  32. Partridge, W., et. al., Time-Resolved Measurements of Emission Transients by Mass Spectrometry, SAE paper 2000-01-2952; SAE Transactions, Journal of Fuels and Lubricants, 109 (2000), pp. 2992-2999
  33. Reavell, K., Hands, T., Collings, N., A Fast-Response Particulate Spectrometer for Combustion Aerosols, SAE paper 2002-01-2714, SAE Transactions, Journal of Fuels and Lubricants, 111 (2002), pp. 1338-1344
  34. Park, K., et. al., Relationship between Particle Mass and Mobility for Diesel Exhaust Particles, Environmental Science and Technology, 37 (2003), 3, pp. 577-583

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