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TECHNICAL PAPERS

Control of Camless Intake Process—Part II

[+] Author and Article Information
M.-S. S. Ashhab, A. G. Stefanopoulou

Mechanical and Environmental Engineering Department, University of California, Santa Barbara, CA 93106

J. A. Cook, M. B. Levin

Ford Motor Company, Scientific Research Laboratory, Dearborn, MI 48121

J. Dyn. Sys., Meas., Control 122(1), 131-139 (Jul 14, 1998) (9 pages) doi:10.1115/1.482448 History: Received July 14, 1998
Copyright © 2000 by ASME
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References

Ashhab, M. S., Stefanopoulou, A. G., Cook, J. A., and Levin, M., 1998, “Camless Engine Control for Robust Unthrottled Operation,” SAE Paper No. 981031.
Urata, Y., Umiyama, H., Shimizu, K., Fujiyoshi, Y., Sono, H., and Fukuo, K., 1993, “A Study of Vehicle Equipped with Non-Throttling SI Engine with Early Intake Valve Closing,” SAE Paper No. 930820.
Vogel, O., Rousssopoulos, K., Guzzella, L., and Czekai, J., 1996, “An Initial Study of Variable Valve Timing Implemented with a Secondary Valve in the Intake Runner,” SAE Paper No. 960590.
Schecter, M. M., and Levin, M. B., 1996, “Camless Engine,” SAE Paper No. 960581.
Astrom, K., and Wittenmark, B., 1989, Adaptive Control, Addison-Wesley, Reading, MA.

Figures

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Block diagram of the adaptive feedforward control scheme
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Cylinder air charge requirements and optimality constraints for operation at 1500 rpm
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Pumping loss minimization at 1500 rpm
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Signal processing for the induced measurements
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Mass air flow and air mass fractions of three-cylinder overlap
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Nominal μkk as a function of vd for a four-cylinder engine at an engine speed of 1500 rmp
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Nominal μkk as a function of vd for a four-cylinder engine at an engine speed of 6000 rpm
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Flow chart of the closed loop controller algorithm for a four-cylinder engine with two-cylinder overlap (r=2)
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Flow chart of the closed-loop controller algorithm for an n-cylinder engine with three-cylinder overlap (r=3)
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Nominal engine tracking
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Air charge regulation during engine speed changes
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Cylinder balancing in the cylinder overlap case

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