کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6636161 461130 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Combustion and emission characteristics of a turbocharged diesel engine using high premixed ratio of methanol and diesel fuel
ترجمه فارسی عنوان
ویژگی های احتراق و انتشار یک موتور دیزل توربوشارژ با استفاده از نسبت پیش آمونیاک متانول و سوخت دیزل
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی
The combustion and emission characteristics of a dual fuel diesel engine with high premixed ratio of methanol (PRm) were investigated. Experiments were performed on a 6-cylinder turbocharged, inter-cooling diesel engine. Methanol was injected through the intake port and ignited by direct injected diesel in the cylinder, the maximum PRm was over 70%. The experimental results showed that with high PRm, the maximum in-cylinder pressure increased from medium to high engine load but varied little or even decreased at low engine speed and load. High PRm prolonged the ignition delay but shortened the combustion duration and decreased the in-cylinder gas temperature at ignition timing. Hydrocarbons (HC), carbon monoxide (CO), formaldehyde emissions and the proportion of nitrogen dioxide (NO2) in nitrogen oxides (NOX) increased significantly with the increase of PRm while NOX and dry soot emissions were significantly reduced, which meant the trade-off relationship between NOX and soot emissions disappeared. The increased HC, CO and formaldehyde emissions could be effectively reduced by diesel oxidation catalyst (DOC) when the exhaust gas temperature reached the light off temperature of the DOC. After DOC, the NO2 proportion in NOX was greatly reduced to less than that of baseline engine at methanol premixed mode but increased slightly at pure diesel mode. The maximum PRm was confined by in-cylinder pressure at high engine speed and load. But at low engine speed and load, it was confined by the high emissions of HC, CO and formaldehyde even after DOC.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 140, 15 January 2015, Pages 156-163
نویسندگان
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