The performance of a methane direct injection engine was investigated under various fuel injection timings and injection pressures. A single-cylinder optical engine was used to acquire in-cylinder pressure data and flame images. An outward-opening injector was installed at the center of the cylinder head. Experimental results showed that the combustion characteristics were strongly influenced by the end of injection (EOI) timing rather than the start of injection (SOI) timing. Late injection enhanced the combustion speed because the short duration between the end of injection and the spark-induced strong turbulence. The flame propagation speeds under various injection timings were directly compared using crank-angle-resolved sequential flame images. The injection pressure was not an important factor in the combustion; the three injection pressure cases of 0.5, 0.8, and 1.1 MPa yielded similar combustion trends. In the cases of late injection, the injection timings of which were near the intake valve closing (IVC) timing, the volumetric efficiency was higher (by 4%) than in the earlier injection cases. This result implies that the methane direct injection engine can achieve higher torque by means of the late injection strategy.
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August 2017
Research-Article
Combustion Characteristics of Methane Direct Injection Engine Under Various Injection Timings and Injection Pressures
Jingeun Song,
Jingeun Song
Department of Mechanical Convergence
Engineering,
Graduate School of Hanyang University,
Seoul 04763, South Korea
e-mail: sjg@hanyang.ac.kr
Engineering,
Graduate School of Hanyang University,
Seoul 04763, South Korea
e-mail: sjg@hanyang.ac.kr
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Mingi Choi,
Mingi Choi
Department of Mechanical Convergence
Engineering,
Graduate School of Hanyang University,
Seoul 04763, South Korea
e-mail: cmk0310@hanyang.ac.kr
Engineering,
Graduate School of Hanyang University,
Seoul 04763, South Korea
e-mail: cmk0310@hanyang.ac.kr
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Daesik Kim,
Daesik Kim
School of Mechanical and
Automotive Engineering,
Gangneung-Wonju National University,
Gangwon 26403, South Korea
e-mail: dkim@gwnu.ac.kr
Automotive Engineering,
Gangneung-Wonju National University,
Gangwon 26403, South Korea
e-mail: dkim@gwnu.ac.kr
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Sungwook Park
Sungwook Park
School of Mechanical Engineering,
Hanyang University,
17 Haengdang-dong, Seongdong-gu,
Seoul 04763, South Korea
e-mail: parks@hanyang.ac.kr
Hanyang University,
17 Haengdang-dong, Seongdong-gu,
Seoul 04763, South Korea
e-mail: parks@hanyang.ac.kr
Search for other works by this author on:
Jingeun Song
Department of Mechanical Convergence
Engineering,
Graduate School of Hanyang University,
Seoul 04763, South Korea
e-mail: sjg@hanyang.ac.kr
Engineering,
Graduate School of Hanyang University,
Seoul 04763, South Korea
e-mail: sjg@hanyang.ac.kr
Mingi Choi
Department of Mechanical Convergence
Engineering,
Graduate School of Hanyang University,
Seoul 04763, South Korea
e-mail: cmk0310@hanyang.ac.kr
Engineering,
Graduate School of Hanyang University,
Seoul 04763, South Korea
e-mail: cmk0310@hanyang.ac.kr
Daesik Kim
School of Mechanical and
Automotive Engineering,
Gangneung-Wonju National University,
Gangwon 26403, South Korea
e-mail: dkim@gwnu.ac.kr
Automotive Engineering,
Gangneung-Wonju National University,
Gangwon 26403, South Korea
e-mail: dkim@gwnu.ac.kr
Sungwook Park
School of Mechanical Engineering,
Hanyang University,
17 Haengdang-dong, Seongdong-gu,
Seoul 04763, South Korea
e-mail: parks@hanyang.ac.kr
Hanyang University,
17 Haengdang-dong, Seongdong-gu,
Seoul 04763, South Korea
e-mail: parks@hanyang.ac.kr
Contributed by the IC Engine Division of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received December 22, 2016; final manuscript received December 30, 2016; published online March 21, 2017. Editor: David Wisler.
J. Eng. Gas Turbines Power. Aug 2017, 139(8): 082802 (8 pages)
Published Online: March 21, 2017
Article history
Received:
December 22, 2016
Revised:
December 30, 2016
Citation
Song, J., Choi, M., Kim, D., and Park, S. (March 21, 2017). "Combustion Characteristics of Methane Direct Injection Engine Under Various Injection Timings and Injection Pressures." ASME. J. Eng. Gas Turbines Power. August 2017; 139(8): 082802. https://doi.org/10.1115/1.4035817
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