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TECHNICAL PAPERS—SPECIAL ICE SECTION: Intake and Exhaust System Dynamics

Influence of the Exhaust System Design on Scavenging Characteristic and Emissions of a Four-Cylinder Supercharged Engine

[+] Author and Article Information
Ferdinand Trenc, Frančišek Bizjan, Brane Širok

Department of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, Sl-1000 Ljubljana, Slovenia

Aleš Hribernik

Department of Mechanical Engineering, University of Maribor, Smetanova 17, Sl-2000 Maribor, Slovenia

J. Eng. Gas Turbines Power 122(4), 556-561 (May 09, 2000) (6 pages) doi:10.1115/1.1289387 History: Received December 02, 1999; Revised May 09, 2000
Copyright © 2000 by ASME
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References

Figures

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2-Pulse (left) and constant pressure (right) exhaust systems
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Relative A/F ratio for both exhaust systems
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Ratio of relative pumping losses for: (—) a two-pulse, and (- - -) a constant pressure exhaust system
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Torque engine conditions and two-pulse (above), and constant-pressure (below) exhaust system
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Computed gas velocity distribution in the intake and exhaust port, relative F/A equivalence ratios for both exhaust systems, peak engine torque conditions and two different valve timings
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Pressure distribution in the intake, exhaust port and cylinder for engine rated speed, lower load, and both exhaust systems
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Gas velocity distribution for the engine rated speed, low loads and both exhaust systems
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Ratio of the engine volumetric efficiency for both exhaust systems
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Residual gases in the cylinder for two exhaust systems
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Smoke density ratio of the two-pulse and constant pressure exhaust system
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CO2 emission for both exhaust systems
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Specific mass-emission of the hydrocarbons
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Ratio of mass-specific NOx emission for two different exhaust systems

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