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    • Effects of Control Parameters on Mixture Formation and Combustion Characteristics of a Direct Injection Hydrogen Internal Combustion Engine
    DOI：
    Key Words:direct injection  hydrogen engine  internal combustion engine  control strategy  mixture formation  combustion characteristic
    Author NameAffiliationE-mail
    LI Dongye Shenyang Aerospace Mitsubishi Motors Engine Manufacturing Co.， Ltd.， Shenyang 110179， China dongye.li@same.com.cn 
    LIU Shaopeng Shenyang Aerospace Mitsubishi Motors Engine Manufacturing Co.， Ltd.， Shenyang 110179， China shaopeng.liu@same.com.cn 
    HU Zhen State Key Laboratory of Engines， Tianjin University， Tianjin 300072， China huzhen@tju.edu.cn 
    ZHOU Lei State Key Laboratory of Engines， Tianjin University， Tianjin 300072， China lei.zhou@tju.edu.cn 
    WEI Haiqiao* State Key Laboratory of Engines， Tianjin University， Tianjin 300072， China whq@tju.edu.cn 
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    Abstract:Based on an in-line 4-cylinder 4-stroke direct injection hydrogen internal combustion engine， a three-dimensional （3D） computational fluid dynamics（CFD） simulation model was established. The effects of engine control parameters on mixture formation and combustion characteristics were investigated. The results show that the peak values of in-cylinder pressure and heat release rate increase， and the combustion phases delay with the increase of equivalence ratio. The decreased equivalence ratio results in a similar but leaner mixture distribution in the cylinder. The mixture distribution that the rich mixture closer to the spark plug is the key to accelerating the flame propagation. With the delay of hydrogen injection timing， the peak values of in-cylinder pressure and heat release rate increase， the ignition delay period is shortened， and the combustion phase is advanced. The mixture distribution in the cylinder is a decisive factor in the effects of injection pressures and injection timings on the combustion process.
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