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TECHNICAL PAPERS

Transient Response of a Cross-Flow Charge Air Intercooler and Its Influence on Engine Operation

[+] Author and Article Information
Ales Hribernik

Faculty of Mechanical Engineering, University of Maribor, Maribor, Slovenia

John J. Moskwa

Powertrain Control Research Laboratory, University of Wisconsin, Madison, WI 53706

J. Dyn. Sys., Meas., Control 122(3), 483-489 (Jun 16, 1998) (7 pages) doi:10.1115/1.1286683 History: Received June 16, 1998
Copyright © 2000 by ASME
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References

Figures

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Cross-flow heat exchanger
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Separated section of heat exchanger
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Discretization of computation domain
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Discretization of computational domain at the boundaries
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Intercooler temperatures along the center line during warm-up period; 0–at the charge air inflow, 0.33–at one third of the length, 0.66–at two thirds of the length, 1.0–at the charge air outflow
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Steady-state temperature distribution within intercooler
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Comparison of predicted and measured intercooler effectiveness; □–cooling air flow rate=148 kg/min, •–cooling air flow rate=238 kg/min
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Engine intake thermodynamic system
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Engine load and fueling during acceleration
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Engine and turbocharger (TC) speed during engine acceleration
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Boost pressure p2 and compressor outlet temperature T2 during engine acceleration
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Comparison of intercooler outlet temperature predicted by NTU effectiveness method and by proposed two-dimensional model (2D) during engine acceleration
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Intercooler temperatures along the center line during engine acceleration 0.0–at the charge air inflow, 0.5–at the middle, 1.0–at the charge air outflow
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Comparison of equivalent air-to-fuel ratio predicted by NTU effectiveness method and by proposed two-dimensional model (2D) during engine acceleration
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Engine load and fueling during deceleration
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Engine and turbocharger (TC) speed during engine deceleration
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Boost pressure p2 and compressor outlet temperature T2 during engine deceleration
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Comparison of intercooler outlet temperature predicted by NTU effectiveness method and by proposed two-dimension model (2D) during engine deceleration
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Comparison of equivalent air-to-fuel ratio predicted by the NTU effectiveness method and by the proposed two-dimensional model (2D) during engine deceleration

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