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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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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