TECHNICAL PAPERS: Internal Combustion Engines

Combustion and Emission Characteristics of Direct-Injection Compression Ignition Engines by Means of Two-Stage Split and Early Fuel Injection

[+] Author and Article Information
K. Yamane, Y. Shimamoto

Department of Mechanical Systems Engineering, The University of Shiga Prefecture, 2500 Hassaka, Hikone, Shiga 522-8533, Japan

J. Eng. Gas Turbines Power 124(3), 660-667 (Jun 19, 2002) (8 pages) doi:10.1115/1.1473157 History: Received July 13, 2000; Revised December 05, 2001; Online June 19, 2002
Copyright © 2002 by ASME
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Ryan, T. W. III, and Callahan. T. J., 1996, “Homogeneous Charge Compression Ignition of Diesel Fuel,” SAE Technical Paper 961160.
Takeda, Y., Nakagome, K., and Niimura, K., 1996, “Emission Characteristics of Premixed Lean Diesel Combustion With Extremely Early Staged Fuel Injection,” SAE Technical Paper 961163.
Yokota, H., Kudo, Y., Nakajima, H., Kakegawa, T., and Suzuki, T., 1997, “A New Concept for Low Emission Diesel Combustion,” SAE Technical Paper 970891.
Hashizume, T., Akagawa, H., and Tsujimura, K., 1997, “Emission Reduction Using Multiple Stage Diesel Injection,” Proc. of The 14th Internal Combustion Engine Symposium, SAE of Japan, Tokyo, pp. 259–264 (in Japanese).
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Combustion chamber configuration
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Layout of second-stage injection system
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Schematic illustration of a high-pressure injection system using oil-hammering in a convergent pipeline, KD-3 (Ikegami et al. 5)
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Effect of first-stage injection timings, θjl on indicated specific fuel consumption, bi, indicated mean effective pressure, pi, degree of constant volume, ηglh, combustion efficiency, ηi, concentrations of NOx, smoke, HC(C1−C7), HCHO, CH3CHO, and HCOOH
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Courses of cylinder pressure, p, rate of heat release, q̇, mean gas temperature, Tg, and lift of nozzle needle, hz, at different first-stage injection timings (ne=1800 rpm,ϕ=0.4)
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Concentrations of exhaust gas emissions including unregulated species analyzed by FT-IR for different first-stage injection timings, θj1 (ne=1800 rpm,ϕ=0.4)
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Effect of equivalence ratios, ϕ, on engine performance and exhaust gas emissions at SPEI and ordinary diesel combustion obtained by KD-3 injection system
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Courses of p,q̇,Tg, and hz for different equivalence ratio ϕ
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Courses of p,q̇,Tg,hz and the pressure in nozzle holder-inlet, pN, for different equivalence ratio, ϕ, by using a KD-3 injection system
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Relationship between HCHO from exhaust and maximum of rate of heat release q̇max
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Relationship between smoke density, indicated specific fuel consumption ISFC, and NOx concentration obtained from experimental results by first-stage injection timing changes for SPEI and EI, and injection timing changes for ordinary diesel combustion



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