Diesel engine alternative fuels, such as methanol and biodiesel, are beneficial to reduce diesel engine emission. In order to study the influence of methanol and biodiesel on the performance, economy and emission of small agricultural diesel engine, the physical-chemical properties ( cetane number, lower heat value (LHV), viscosity, etc.) of methanol and biodiesel were analyzed. The methanol and biodiesel showed good complementary property to some extent. When a large proportion of methanol was added into biodiesel, the cetane number of the methanol/biodiesel blend will be greatly reduced. Since the cetane number of the blend fuel has great influence on the combustion process of diesel engine, after testing for blending ratio of methanol/biodiesel, the blend was prepared with 5％( BM5) , 10％( BM10) and 15％( BM15) methanol, respectively. Di-Tert-Butyl Peroxide ( DTBP ) was chosen as a cetane number improver to be added into methanol/biodiesel blend. 0.25％, 0.50％ and 0.75％ of DTBP was added into BM15. The bench test was carried out on a 186FA diesel engine to study the effect of methanol and DTBP on the engine performance and emissions. The results show that, at rated condition, compared with biodiesel, the NOx concentration of BM5, BM10 and BM15 is reduced by 5. 02％, 33. 85％ and 21.24％, and smoke is reduced by 5.56％, 22.22％ and 55.56％. However, the engine power is also reduced by 5.77％, 14.23％ and 25.41％, and the brake specific energy consumption is increased by 3.31％, 7.78％ and 6.37％. The addition of DTBP in methanol/biodiesel could recover the engine power to the level of diesel. DTBP shows good effect on the reduction of the brake specific energy consumption and NOx , CO, HC concentration, but a little increase of exhaust smoke.

Ruina Li;Liang Zhang;Jialong Zhu;Yan Hua;Zhong Wang

School of Automotive and Traffic Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China;Vehicle Measurement,Control and Safety Key Laboratory of Sichuan Province,Chengdu 610039,China;Provincial Engineering Research Center for New Energy Vehicle Intelligent Control and Simulation Test Technology of Sichuan,Chengdu 610039,China

哈尔滨工业大学学报（英文版）

[1]Ruina Li;Liang Zhang;Jialong Zhu;Yan Hua;Zhong Wang-.Experimental Study on the Performance and Emission of Chinese Small Agricultural Diesel Engine Fuelled with Methanol/Biodiesel/DTBP)[J].哈尔滨工业大学学报（英文版）,2022(03):67-78

Fuelled,Biodiesel,LHV,BM10,BM15,Tert,improver,186FA

Experimental,Study,Performance,Emission,Chinese,Small,Agricultural,Diesel,Engine,Methanol,DTBP,engine,alternative,fuels,such,methanol,biodiesel,beneficial,In,order,study,influence,performance,economy,small,agricultural,physical,chemical,properties,cetane,number,lower,heat,value,viscosity,etc,were,analyzed,showed,good,complementary,property,some,extent,When,large,proportion,was,added,into,will,greatly,reduced,Since,has,combustion,process,after,testing,blending,prepared,BM5,respectively,Butyl,Peroxide,chosen,bench,carried,out,effect,emissions,results,that,rated,condition,compared,NOx,concentration,by,smoke,However,power,also,brake,specific,energy,consumption,increased,addition,could,recover,level,shows,reduction,HC,but,little,exhaust

0.373051