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This study explores the effects of blending methane and dimethyl ether (DME) on the auto-ignition and combustion characteristics of HCCI engines. By experimenting with varying mixing ratios of methane and DME, we examine how these ratios influence ignition temperature and timing. Utilizing a 4-stroke engine setup, our findings indicate that increasing the ratio of methane and DME results in later ignition timing while affecting the peak pressure of the combustion process. This research contributes to understanding alternative fuel utilization in advanced engine systems.
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KEIOUNIVERSITY The Study on Auto-ignition and Combustion Process of the Fuel Blended with Methane and DME in HCCI Engine Susumu Sato, Daisuke Yamashita, Junpei Ozaki, Azusa Ito Purpose We use the Fuel blended with Methane and DME and search the effect of mixing ratio on ignition temperature and ignition timing . Experiment system 4 stroke engine DME Methane 623 Results Qin=960J const fCH4=0.1 const fDME=0.1 const ・ Ignition timing and RHR peak timing became later （faster） by increasing Methane （DME）ratio. ・ Peak pressure became lower by delaying RHR peak timing. 2005 IIDA LABORATORY
