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Summary & Details

A Study of Autoignition and Combustion Characteristics in an HCCI Engine using a Blended Fuel of DME and City Gas

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Format: PDF

Price: Non-members (tax incl.)：￥1,100 Members (tax incl.)：￥880

Publication code: 20239245

Paper/Info type: Other International Conferences

Pages: 1-7(Total 7 p)

Date of publication: Aug 2023

Publisher: JSAE & SAE

Language: English

Event: 2023 P, E&L

Detailed Information

Category(E)	IC2 CI Injection and Combustion, High Efficiency, Optimization of Engine Operating Area
Author(E)	1) Reo Yamagiwa, 2) Yusuke MANABE, 3) Shinji MITO, 4) Akira IIJIMA, 5) Shintaro YOSHIHARA, 6) Takahiro YAMAGUCHI, 7) Sekai MIYAMOTO
Affiliation(E)	1) Nihon University, 2) Nihon University, 3) Nihon University, 4) Nihon University, 5) Kawasaki Heavy Industries, Ltd, 6) Kawasaki Heavy Industries, Ltd, 7) Kawasaki Heavy Industries, Ltd
Abstract(E)	In recent years, there has been a need to reduce CO₂ emissions from internal combustion engines in order to realize an energy-saving and low-carbon society. In addition, the substitution of petroleum-based liquid fuels such as gasoline and diesel oil is becoming more and more important due to environmental problems such as global warming, carbon dioxide emissions and global energy demand. The combustion characteristics of a blended fuel of dimethyl ether (DME) as the ignition source and city gas as the main fuel, which have vastly different ignition characteristics, were investigated in experiments conducted with a test engine. The intermediate combustion products of the two fuel components were also investigated and analyzed by conducting chemical kinetic simulations. Specifically, combustion characteristics were investigated under various the injected heat energy of city gas while keeping the injected heat energy of DME per cycle constant. The results revealed that supercharging lowered the combustion temperature, thereby delaying and extending the main combustion period to moderate combustion reactions. However, excessive fuel input tended to destabilize combustion, such as inducing misfiring, and increased the CO emission concentration. The chemical kinetic simulations revealed that high-level supercharging reduced the quantity of radicals produced, thereby moderating the in-cylinder temperature rise.

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