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TECHNICAL PAPERS: Manifold Gas Dynamics and Turbocharging

Numerical Analysis of Unsteady Exhaust Gas Flow and Its Application for Lambda Control Improvement

[+] Author and Article Information
K. Yoshizawa, K. Mori, K. Arai, A. Iiyama

Powertrain Research Laboratory, Nissan Research Center, Nissan Motor Co., Ltd., 1 Natsushima-cho, Yokosuka 237-8523, Japan

J. Eng. Gas Turbines Power 125(2), 555-562 (Apr 29, 2003) (8 pages) doi:10.1115/1.1473149 History: Received January 01, 2000; Revised August 01, 2000; Online April 29, 2003
Copyright © 2003 by ASME
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References

Figures

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Selection of optimum oxygen sensor location based on calculations
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Comparison of gas concentration from each cylinder at oxygen sensor
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Effect of cylinder runner length on period of gas presence
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Ignition timing and sensor sensitivity of V-8 engine
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Lambda control method for an exhaust manifold with different-length cylinder runners
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Computational grids for a close-coupled catalytic converter system
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Computational grid size dependency
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Comparison of predicted and measured gas flow at catalyst inlet
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Comparison of predicted and measured velocities at oxygen sensor
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Oxygen sensor sensitivity
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Comparison of calculated and measured sensor sensitivities
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Simulation method for exhaust gas pulsation due to the gas exchange process
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Comparison of predicted and measured pressure at oxygen sensor
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Calculated velocities and gas concentrations at oxygen sensor
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Comparison of calculated and measured sensor sensitivities
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Correlation between calculated and experimental sensor sensitivity dispersion

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