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TECHNICAL PAPERS: Internal Combustion Engines

Utilization of Low-Calorific Gaseous Fuel in a Direct-Injection Diesel Engine

[+] Author and Article Information
Ali Mohammadi

 Toyota Motor Europe, Hoge Wei 33B-1930 Zaventem, Belgiumali.mohammadi@toyota-europe.com

Masahiro Shioji

Graduate School of Energy Science,  Kyoto University, Sakyo-ku, Kyoto 606-8501, Japanshioji@energy.kyoto-u.ac.jp

Takuji Ishiyama, Masato Kitazaki

Graduate School of Energy Science,  Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan

J. Eng. Gas Turbines Power 128(4), 915-920 (Nov 02, 2005) (6 pages) doi:10.1115/1.2179464 History: Received September 14, 2004; Revised November 02, 2005

Low-calorific gases with a small portion of hydrogen are produced in various chemical processes, such as gasification of solid wastes or biomass. The aim of this study is to clarify the efficient usage of these gases in diesel engines used for power generation. Effects of amount and composition of low-calorific gases on diesel engine performance and exhaust emissions were experimentally investigated adding hydrogen-nitrogen mixtures into the intake gas of a single-cylinder direct-injection diesel engine. The results indicate that optimal usage of low-calorific gases improves NOx and Smoke emissions with remarkable saving in diesel fuel consumption.

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Copyright © 2006 by American Society of Mechanical Engineers
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Figures

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Figure 1

Engine specification and combustion chamber

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Figure 2

Experimental setup

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Figure 3

Definition of LCG amount and composition

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Figure 4

Effects of LCG addition on engine performance at constant engine load

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Figure 5

Effects of LCG addition on exhaust emissions at engine load of pe=0.6MPa

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Figure 6

Effects of LCG addition on in-cylinder pressure p and heat release rate dq∕dθ at engine load of pe=0.6MPa

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Figure 7

Effects of LCG addition on thermal efficiency ηe and consumption of diesel fuel beDF under various engine loads

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Figure 8

Effects of LCG addition on in-cylinder pressure p and heat release rate dq∕dθ under low and high engine loads

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Figure 9

Combustion efficiency of hydrogen ηc and concentration of unburned hydrogen UH2 in engine exhaust against engine load

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Figure 10

Equivalence ratios of diesel fuel ϕDF and hydrogen ϕH under various engine loads and LCG compositions

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Figure 11

Effects of LCG composition on exhaust emissions under various engine loads

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Figure 12

Effects of injection timing on brake thermal efficiency ηe and diesel fuel consumption beDF

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Figure 13

Effects of injection timing on exhaust emissions

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