Development of the Low-Emission GE-7FDL High-Power Medium-Speed Locomotive Diesel Engine

[+] Author and Article Information
G. Chen

Department of Mechanical Engineering, Gannon University, Erie, PA 16541

P. L. Flynn, S. M. Gallagher, E. R. Dillen

GE Transportation Systems, Erie, PA 16531

J. Eng. Gas Turbines Power 125(2), 505-512 (Apr 29, 2003) (8 pages) doi:10.1115/1.1563241 History: Received October 01, 2001; Revised June 01, 2002; Online April 29, 2003
Copyright © 2003 by ASME
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Environmental Protection Agency, 1998, “Emission Standards for Locomotives and Locomotive Engines,” 40 CFR, Part 85, 89, and 92.
Environmental Protection Agency, 1998, “General Provisions for Emission Regulations for Locomotives and Locomotive Engines,” 40 CFR, Part 92, Subpart A.
Hsu, B. D., 1984, “Heat Release, Cycle Efficiency and Maximum Cylinder Pressure in Diesel Engine—The Use of an Extended Air Cycle Analysis,” SAE Paper No. 841054.
Hsu, B. D., and Chen, G., 2001, “Increased Compression Ratio Diesel Engine Assembly for Retarded Fuel Injection Timing,” U.S. Patent 6,318,308, assigned to General Electric Company.
Hsu, B. D., Chen, G., and Cryer, R. D, 2002, “High Injection Rate, Decreased Injection Duration Diesel Engine Fuel System,” U.S. Patent 6,349,706, assigned to General Electric Company.
Hsu, B. D., and Hoffman, J. G., 1985 “The Effect of Diesel Fuel Properties on the Combustion of a Medium Speed Diesel Engine,” ASME Paper No. 85-DGP-14.
Chen, G., and Hsu, B. D., 2000, “Reduced Emissions Elevated Altitude Speed Control for Diesel Engines,” U.S. Patent 6,158,416, assigned to General Electric Company.
Chen, G., Hsu, B. D., and Cryer, R. D., 2001, “Apparatus and Method for Suppressing Diesel Engine Emissions,” U.S. Patent 6,325,044, assigned to General Electric Company.
Environmental Protection Agency, 1998, “Test Procedures,” 40 CFR, Part 92, Subpart B.
Dillen, E. R., Gallagher, S. M., Dunsworth, V. F., and Orinko, J. T., 2002, “Locomotive Transient Smoke Control Strategy Using Load Application Delay and Fuel Injection Timing Advance,” U.S. Patent 6,341,596, assigned to General Electric Company.
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Cross section of 7FDL engine baseline
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Locomotive baseline emissions and comparison
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Efficiency affected by solely retarding injection timing to reduce NOx (estimated for 7FDL16 engine, full load)
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Engine combustion analysis for the emission-reduction approach development; (a) cylinder pressure and fuel injection and (b) temperature and heat release
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Engine combustion analysis for increasing compression ratio coupled with modifying injection timing (single-cylinder engine)
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Intake manifold air temperature effect on cylinder temperature
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Transient smoke optimization on tier-0 compliant locomotive
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Low-emission GE-AC4400 locomotive meeting Tier-0 standards (line-haul duty cycle)
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Performance comparison over fuel cam phase (HCR 7FDL16 engine)
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Change in engine pre-turbine temperature (full load)
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Effect of MAT on HCR 7FDL16 engine NOx
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NOx reduction versus compression ratio with unchanged SFC (7FDL16 engine)
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Reduction in NOx versus compression ratio (7FDL16 engine, full load)
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Illustration of the fuel cam phase shift
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Comparison of in-cylinder efficiency between two spray angle injector tips
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Illustration of injector tip spray included angle
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Fuel injection pressure modification in the HCR engine configuration




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