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TECHNICAL PAPERS: Internal Combustion Engines

Three-Way Catalytic Converter Modeling as a Modern Engineering Design Tool

[+] Author and Article Information
G. N. Pontikakis, G. S. Konstantas, A. M. Stamatelos

Mechanical and Industrial Engineering Department, University of Thessaly, 383 34 Volos, Greece

J. Eng. Gas Turbines Power 126(4), 906-923 (Nov 24, 2004) (18 pages) doi:10.1115/1.1787506 History: Received December 01, 2002; Revised September 01, 2003; Online November 24, 2004
Copyright © 2004 by ASME
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References

Figures

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Measured instantaneous CO, HC, and NOx emissions at converter inlet and exit, over the 1180-sec duration of the cycle: 2-l-engined passenger car equipped with a 2.4-l underfloor converter with 50-g/ft3 Pt:Rh catalyst
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Evolution of the values of three selected kinetics parameters in the 100 individuals of the population during 135 generations. The convergence to the final values is apparent even from the 40th generation.
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Computed and measured cumulative CO, HC, and NOx emissions at converter exit during NEDC: 2-l-engined passenger car equipped with a 2.4-l underfloor converter with 50-g/ft3 Pt:Rh catalyst
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Measured converter inlet temperatures, computed, and measured converter exit temperatures during NEDC: 2-l-engined passenger car equipped with a 2.4-l underfloor converter with 50-g/ft3 Pt:Rh catalyst
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Computed and measured instantaneous CO emissions at converter inlet and exit during the first 600 sec of NEDC: 2-l-engined passenger car equipped with a 2.4-l underfloor converter with 50-g/ft3 Pt:Rh catalyst
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Computed and measured instantaneous CO emissions at converter inlet and exit during the second half of the NEDC (600–1180 sec of NEDC): 2-l-engined passenger car equipped with a 2.4-l underfloor converter with 50-g/ft3 Pt:Rh catalyst
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Computed and measured instantaneous NOx emissions at converter inlet and exit during the first 600 sec of NEDC: 2-l-engined passenger car equipped with a 2.4-l underfloor converter with 50-g/ft3 Pt:Rh catalyst
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Computed and measured instantaneous NOx emissions at converter inlet and exit during the second half of NEDC: 2-l-engined passenger car equipped with a 2.4-l underfloor converter with 50-g/ft3 Pt:Rh catalyst
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Computed and measured instantaneous HC emissions at converter inlet and exit during the first 600 sec of NEDC: 2-l-engined passenger car equipped with a 2.4-l underfloor converter with 50-g/ft3 Pt:Rh catalyst
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Computed and measured instantaneous HC emissions at converter inlet and exit during the second half of NEDC: 2-l-engined passenger car equipped with a 2.4-l underfloor converter with 50-g/ft3 Pt:Rh catalyst
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Computed (based on the kinetics parameters values of Table 1) and measured cumulative CO, HC, and NOx emissions at converter exit during NEDC. 2-l-engined passenger car equipped with a 0.6-l underfloor converter with 50-g/ft3 Pt:Rh catalyst. Apparently, the model is capable of predicting the significant difference in CO, HC, and NOx emissions at the exit of the reduced-size converter.
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Computed (based on the kinetics parameters values of Table 1) and measured instantaneous HC emissions at converter exit during NEDC: 2-l-engined passenger car equipped with a 0.6-l underfloor converter with 50-g/ft3 Pt:Rh catalyst. Apparently, the model is capable of predicting with good accuracy the characteristic HC breakthrough with the reduced-size converter during the high-speed part of NEDC.
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Computed (based on the kinetics parameters values of Table 1) and measured instantaneous CO emissions at converter exit during NEDC: 2-l-engined passenger car equipped with a 0.6-l underfloor converter with 50-g/ft3 Pt:Rh catalyst
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Computed and measured cumulative CO, HC, and NOx emissions at converter exit during FTP-75: 2.2-l-engined passenger car equipped with a 0.8-l close-coupled converter with 150-g/ft3 Pd:Rh catalyst
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Computed and measured converter exit temperatures during the first 600 sec of FTP-75 test cycle: 2.2-l-engined passenger car equipped with a 0.8-l close-coupled converter with 150-g/ft3 Pd:Rh catalyst. Converter inlet temperature recording is also shown.
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Computed and measured instantaneous HC emissions at converter exit during the first 600 sec of FTP-75 test cycle: 2.2-l-engined passenger car equipped with a 0.8-l close-coupled converter with 150-g/ft3 Pd:Rh catalyst

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