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TECHNICAL PAPERS: Gas Turbines: Controls, Diagnostics & Instrumentation

Reduction of Nitric Oxides and Soot by Premixed Fuel in Partial HCCI Engine

[+] Author and Article Information
Dae Sik Kim

Mechanical Engineering and Technology Research Institute, Hanyang University, 17 Haengdang-Dong, Sungdong-Gu, Seoul 133-791, Korea

Myung Yoon Kim

Graduate School of Hanyang University, Hanyang University, 17 Haengdang-Dong, Sungdong-Gu, Seoul 133-791, Korea

Chang Sik Lee1

Department of Mechanical Engineering, Hanyang University, 17 Haengdang-Dong, Sungdong-Gu, Seoul 133-791, Koreacslee@hanyang.ac.kr

1

To whom correspondence should be addressed.

J. Eng. Gas Turbines Power 128(3), 497-505 (Sep 26, 2005) (9 pages) doi:10.1115/1.2132382 History: Received December 20, 2004; Revised September 26, 2005

In order to obtain the reduction effect of NOx and soot emission in a partial homogeneous charge compression ignition engine, premixed fuel was supplied with direct injection diesel fuel. Several additional systems such as a premixed fuel injection system, exhaust gas recirculation (EGR) system, supercharger, and air heating system were equipped in the intake manifold of conventional diesel engine. Premixed fuel with air was compressed and ignited by the directly injected diesel fuel in the combustion chamber at the end of compression stroke. The effect of premixed fuel on combustion and emission characteristics of HCCI diesel engine was investigated experimentally under various conditions of intake air temperature, pressure, and EGR rate. The results showed that in case of the use of gasoline as a premixed fuel, single stage ignition is found, but premixing the diesel fuel accompanies the cool flame prior to the combustion of the directly injected diesel fuel. For the gasoline premixed fuel, both NOx and soot can be reduced by the increase of premixed ratio simultaneously. However, for the diesel premixed fuel, the increase of premixed ratio does not have a significant effect in reducing the soot emission.

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Copyright © 2006 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Schematic diagram of experimental apparatus

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Figure 2

Effect of premixed ratio (Gasoline premixed, 20Nm load, 1200rpm)

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Figure 3

Effect of EGR on NOx and soot emissions (gasoline premixed, 20Nm load, 1200rpm)

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Figure 4

Effect of main injection timing (gasoline premixed, 30Nm load, 1500rpm)

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Figure 5

Effect of intake air temperature on HC and CO emission (gasoline premixed, 20Nm load, 1200rpm)

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Figure 6

Effect of boost pressure on emissions (gasoline premixed, Tin=20°C, 20Nm load, rp=0.6)

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Figure 7

Effect of premixed ratio (diesel premixed, 30Nm load, 1200rpm)

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Figure 8

Effect of intake air temperature on combustion (diesel premixed, 20Nm load, 1800rpm)

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Figure 9

Effect of premixed ratio and intake air temperature on NOx emission (diesel premixed, 20Nm load, 1800rpm)

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Figure 10

Effect of premixed ratio and engine speed on soot, HC, and CO emissions (diesel premixed, 20Nm load, Tin=20°C)

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Figure 11

Effect of premixed ratio and intake air temperature on soot emission (diesel premixed, 20Nm load, 1800rpm)

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Figure 12

Operational range for gasoline and diesel premixed fuels

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Figure 13

Limitation of NOx reduction for gasoline and diesel premixed fuels

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