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Article

Transient Air/Fuel Ratio Controller Identification Using Repetitive Control

[+] Author and Article Information
Andrew W. Osburn

Ray W. Herrick Laboratories, School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907-1077

Matthew A. Franchek

Department of Mechanical Engineering, University of Houston, Houston, TX 77204-4792e-mail: mfranchek@uh.edu

J. Dyn. Sys., Meas., Control 126(4), 781-789 (Mar 11, 2005) (9 pages) doi:10.1115/1.1849249 History: Received January 10, 2003; Revised December 26, 2003; Online March 11, 2005
Copyright © 2004 by ASME
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References

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Figures

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Fuel/air mixture formation and measurement
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Fuel/air control of a fuel-injected SI engine
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Feedback loop for disturbance identification
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Repetitive controller structure
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Mixture formation for individual cylinder events
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Feedforward controller system
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Feedforward controller structure W⁁(⋅,⋅,⋅)
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The gain scheduled feedforward controller
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Estimated frequency response of the fuel path dynamics at various operating conditions
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Frequency responses of Gf(z) and Q(z)
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Transient response of the repetitive controller
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Static nonlinear characteristic of the MAF sensor
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Frequency response of the linear subsystem of W⁁(⋅,⋅,⋅) for a warm engine
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Simulated response of the feedforward controller W⁁(⋅,⋅,⋅) for a warm engine
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Response of the feedforward controller W⁁(⋅,⋅,⋅), transmission in neutral and engine fully warm  
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Response to arbitrary throttle motion, transmission in neutral and engine fully warm
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Response to arbitrary throttle motion, dynamometer setpoint=2000 rpm and engine fully warm
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Temperature transient using repetitive control
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Response of the set W⁁l
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The gating functions θg(T)
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Response of W⁁(⋅,⋅,T) during temperature transient

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