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    • Investigation on the Load Expansion and Performance Optimizing of the Methanol Engine by Turbulent Jet Ignition
    DOI：10.13949/j.cnki.nrjgc.2023.05.003
    Key Words:pre-chamber  turbulent jet ignition  methanol engine  engine load expansion  combustion characteristic
    Author NameAffiliationE-mail
    ZUO Junjie* Guangxi Yuchai Machinery Company Limited， Yulin 537005， China zuojunjie@yuchai.com 
    WANG Zhigang Guangxi Yuchai Machinery Company Limited， Yulin 537005， China 674759323@qq.com 
    CHE Shengnan State Key Laboratory of Engines， Tianjin University， Tianjin 300072， China cheshengnan@tju.edu.cn 
    LIU Zongkuan State Key Laboratory of Engines， Tianjin University， Tianjin 300072， China liuzongkuan@tju.edu.cn 
    XUE Liang Guangxi Yuchai Machinery Company Limited， Yulin 537005， China 494789323@qq.com 
    JIANG Sheng Guangxi Yuchai Machinery Company Limited， Yulin 537005， China 22526897@qq.com 
    ZHOU Lei State Key Laboratory of Engines， Tianjin University， Tianjin 300072， China zhouleiquan@tju.edu.cn 
    WEI Haiqiao* State Key Laboratory of Engines， Tianjin University， Tianjin 300072， China whq@tju.edu.cn 
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    Abstract:The experimental investigation on the load expansion and performance optimizing of a turbulent jet ignition （TJI） methanol engine were carried out in this work. The results show that， under lean conditions i.e. when excess air coefficient is greater than 1.4， the combustion stability and power performance of the methanol engine with TJI system under high-engine load conditions were improved by adopting intake boost technology. And the fuel economy and emission performance of TJI methanol engine were optimized. Meanwhile， the strategies to achieve best fuel consumption rate of a TJI methanol engine under a wide range of engine load were proposed. Under light-load operating conditions， compared to the quality adjustment strategy， a 5.2% reduction of fuel consumption rate were obtained at the indicated mean effective pressure（IMEP） of 0.30 MPa by using the quantity adjustment strategy， and the emissions in terms of CO， HCHO and HC were reduced. Moreover， the usage of quantity adjustment strategy can avoid the deterioration of combustion caused by the over-lean mixture and improve the combustion stability of the TJI methanol engine.
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