A control-oriented engine model is developed to represent a spark ignited engine equipped with a variable cam timing mechanism over a wide range of operating conditions. Based upon laboratory measurements a continuous, nonlinear, low-frequency phenomenological engine model is developed. With respect to a fixed-cam timing engine, the VCT mechanism alters the mass air flow into the cylinders, the torque response, and the emissions of the engine. The developed model reflects all of these modifications and includes a representation of the breathing process, torque and emission generation, and sensor/actuator dynamics. The model has been validated with engine-dynamometer experimental data and can be used in powertrain controller design and development.
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June 1998
Technical Papers
Control-Oriented Model of a Dual Equal Variable Cam Timing Spark Ignition Engine
A. G. Stefanopoulou,
A. G. Stefanopoulou
Ford Motor Company, Scientific Research Laboratory, PO Box 2053, Mail Drop 2036 SRL, Dearborn, MI 48121
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J. A. Cook,
J. A. Cook
Ford Motor Company, Scientific Research Laboratory, PO Box 2053, Mail Drop 2036 SRL, Dearborn, MI 48121
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J. W. Grizzle,
J. W. Grizzle
Control Systems Laboratory, Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI 48109-2122
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J. S. Freudenberg
J. S. Freudenberg
Control Systems Laboratory, Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI 48109-2122
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A. G. Stefanopoulou
Ford Motor Company, Scientific Research Laboratory, PO Box 2053, Mail Drop 2036 SRL, Dearborn, MI 48121
J. A. Cook
Ford Motor Company, Scientific Research Laboratory, PO Box 2053, Mail Drop 2036 SRL, Dearborn, MI 48121
J. W. Grizzle
Control Systems Laboratory, Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI 48109-2122
J. S. Freudenberg
Control Systems Laboratory, Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI 48109-2122
J. Dyn. Sys., Meas., Control. Jun 1998, 120(2): 257-266 (10 pages)
Published Online: June 1, 1998
Article history
Received:
November 12, 1996
Online:
December 3, 2007
Citation
Stefanopoulou, A. G., Cook, J. A., Grizzle, J. W., and Freudenberg, J. S. (June 1, 1998). "Control-Oriented Model of a Dual Equal Variable Cam Timing Spark Ignition Engine." ASME. J. Dyn. Sys., Meas., Control. June 1998; 120(2): 257–266. https://doi.org/10.1115/1.2802417
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