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    • Effects of Fuel Injection Strategies on Combustion and Emission Characteristics of A Diesel Engine Fueled with N-Butanol and Polyoxymethylene Dimethyl Ether/Diesel Blends
    DOI：10.13949/j.cnki.nrjgc.2023.02.002
    Key Words:diesel engine  oxygenated fuel  fuel injection strategy  gaseous emissions  particulate matter emissions
    Author NameAffiliationE-mail
    DUAN Xudong* Department of Automobile Technology，Sichuan Vocational &
    Technical College， Suining 629000， China     		3355955036@qq.com 
    ZENG Dongjian* Key Laboratory of Fluid and Power Machinery of Ministry of Education， Xihua University， Chengdu 610039， China 2673114250@qq.com 
    YUAN Huibin Department of Automobile Technology，Sichuan Vocational &
    Technical College， Suining 629000， China     		 
    PAN Suozhu Key Laboratory of Fluid and Power Machinery of Ministry of Education， Xihua University， Chengdu 610039， China  
    HAN Weiqiang Key Laboratory of Fluid and Power Machinery of Ministry of Education， Xihua University， Chengdu 610039， China  
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    Abstract:Based on base fuel diesel（B0）， 20% volume fraction n-butanol/diesel blend（B20） and 20% volume fraction n-butanol + 20% volume fraction polyoxymethylene dimethyl ether/diesel blend（BP20） were prepared respectively. The combustion and emission characteristics of a diesel engine fueled with B0， B20 and BP20 under different fuel injection strategies were compared and studied. The results show that under the single injection strategy， with the delay of injection timing， the heat release rates of the diesel engine fueled with B0， B20 and BP20 first increase and then decrease， and the NOx emission decreases while the HC and CO emissions increase. And the total mass concentrations of particulate matter of the diesel engine fueled with B0 and BP20 first increase and then decrease. The particle geometric mean diameters of the diesel engine fueled with B0， B20， and BP20 first increase and then decrease. Under the two-injection strategy， with the delay of pre-injection timing， the NOx emission increases while the HC and CO emissions decrease， and the total particulate matter concentration and geometric mean diameter（GMD） increase. After adding n-butanol to diesel， the NOx emission decreases while the HC and CO emissions increase， and the total particulate matter concentration and GMD decrease. After adding PODE to n-butanol/diesel blend， the HC and CO emissions decrease while the NOx and the total particulate matter concentration and GMD increase slightly.
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