Adaptive Air Charge Estimation for Turbocharged Diesel Engines Without Exhaust Gas Recirculation

[+] Author and Article Information
Ove F. Storset

University of California, Santa Barbara, CA 93106  

Anna G. Stefanopoulou

University of Michigan, Ann Arbor, MI 48109  

Roy Smith

University of California, Santa Barbara, CA 93106

J. Dyn. Sys., Meas., Control 126(3), 633-643 (Dec 03, 2004) (11 pages) doi:10.1115/1.1771691 History: Received January 03, 2003; Revised September 23, 2003; Online December 03, 2004
Copyright © 2004 by ASME
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Typical exhaust emissions of hydro carbons (in mg/h) and smoke (in Bosch) for diesel engines versus air-to-fuel ratio (AFR). The engine speed is 2500 rpm, and the fueling level is 6 kg/h.
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A turbocharged diesel engine with intercooler
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Block diagram of observer and identifier where the measurement of the input to the system (12–13) is u, and the measurement of the system output is y
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Inputs to the mean-value engine modell
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States and estimated engine states
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Engine air flow and volumetric efficiency for the adaptive observer, speed density and mass air flow schemes
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Typical curve fit of compressor mass flow parameter, γcw
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Comparison of the actual γTi and its approximations: γ̄Ti and γ⁁Ti, when ηic=0. Notice that the trajectory is generated by the same simulation as in Fig. 6




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