Combustion and Non-Legislation Emission of Methanol Engine&nbsp;under Different Fuel-Air Equivalence Ratios

SUN Jingzhen; YAO Shicong; GONG Baoli; PENG Youhua; CUI Lianbo; PENG Legao; GONG Changming

doi:10.3969/j.issn.1001-2222.2018.05.008

Vehicle Engine ›› 2018, Vol. 0 ›› Issue (5) : 43-48. DOI: 10.3969/j.issn.1001-2222.2018.05.008

Combustion and Non-Legislation Emission of Methanol Engine under Different Fuel-Air Equivalence Ratios

SUN Jingzhen^1,3，YAO Shicong²,GONG Baoli²,PENG Youhua²,CUI Lianbo²,PENG Legao⁴,GONG Changming⁵

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Abstract

The influences of different fuelair equivalence ratios on in-cylinder mixture concentration distribution,combustion characteristics, formaldehyde and unburned methanol were studied on a diesel engine retrofitted in-cylinder injection spark ignition methanol engine by coupling methanol chemical kinetics reaction mechanism with 3D CFD software AVL-Fire. The research results show that the increase of fuelair equivalence ratio can increase maximum incylinder temperature，maximum incylinder pressure and maximum heat release rate significantly and reduce the emission of formaldehyde and unburned methanol obviously. When the fuel-air equivalent ratio increases from 0.33 to 0.67, the maximum combustion pressure, maximum combustion temperature and heat release rate peak increases by 65%, 72% and 51% respectively. When the fuel-air ratio exceeds 0.4, the emission of unburned methanol and formaldehyde decrease sharply and mainly lie near the cylinder wall.

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in-cylinder direct injection / methanol engine / fuel-air equivalence ratio / combustion process / non-legislation emission

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SUN Jingzhen,YAO Shicong,GONG Baoli,PENG Youhua,CUI Lianbo,PENG Legao,GONG Changming. Combustion and Non-Legislation Emission of Methanol Engine under Different Fuel-Air Equivalence Ratios[J]. Vehicle Engine. 2018, 0(5): 43-48 https://doi.org/10.3969/j.issn.1001-2222.2018.05.008