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: https://doi.org/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 ,
YAO Shicong ,
GONG Baoli ,
PENG Youhua ,
CUI Lianbo ,
PENG Legao ,
GONG Changming

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(1.Chongqing Changan New Energy Automobile Co.,Ltd.,Chongqing 401122,China;
3.State Key Laboratory of Automotive Simulation and Control,Jilin university,Changchun 130025,China;
4.Dongfeng Nissan Technical Center,Guangzhou 510640,China; 5.College of Mechanical and Electronic Engineering,Dalian Minzu University,Dalian 116600,China)

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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.

Key words： 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 . DOI: 10.3969/j.issn.1001-2222.2018.05.008

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