Abstract
AbstractThe purpose of this study is to investigate the effect of the bioethanol port injection ratio and the in-cylinder diesel injection timing on combustion and exhaust emissions characteristics using a dual-fuel combustion strategy. Dual-fuel combustion was applied to a single-cylinder diesel engine with a displacement volume of 373.3 cm3. In a diesel–bioethanol dual-fuel combustion system, there is no need for additives to solve any phase separation between diesel and bioethanol. The combustion and emissions characteristics were investigated through the study of the indicated mean effective pressure (IMEP), ignition delay, heat release rate, indicated specific nitrogen oxides (ISNOx), indicated specific soot (ISsoot), indicated hydrocarbon (ISHC), and indicated carbon monoxide (ISCO). It revealed that IMEP increased with increases to the bioethanol port injection ratio, and the effect of bioethanol on IMEP can be clearly observed in early injection timing. The rate of combustion pressure rise decrea...
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