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    • Experimental Study of the Prechamber of High Thermal Efficiency Lean Burn Engine
    DOI：10.13949/j.cnki.nrjgc.2023.01.011
    Key Words:gasoline engine  lean burn  prechamber  thermal efficiency
    Author NameAffiliationE-mail
    HU Ke* Ningbo Geely Royal Engine Components Co.， Ltd.， Ningbo 315336， China ke.hu@geely.com 
    CHAO Yuedong Ningbo Geely Royal Engine Components Co.， Ltd.， Ningbo 315336， China  
    HU Yinuo Ningbo Geely Royal Engine Components Co.， Ltd.， Ningbo 315336， China  
    MA Junjie Ningbo Geely Royal Engine Components Co.， Ltd.， Ningbo 315336， China  
    CHENG Haiyuan Ningbo Geely Royal Engine Components Co.， Ltd.， Ningbo 315336， China  
    WEI Hong Ningbo Geely Royal Engine Components Co.， Ltd.， Ningbo 315336， China  
    LI Shuangqing Ningbo Geely Royal Engine Components Co.， Ltd.， Ningbo 315336， China  
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    Abstract:The ignition ability of different ignition systems was compared by using thermodynamic single cylinder engine test method，to test and verify the lean burn ignition ability of pre-chamber system. Different valve timing， intake-port tumble， pre-chamber geometry were studied to study the pre-chamber ignition engine performance.Results show that compared with the spark plug， active pre-chamber has higher ignition energy， can ignite ultra lean burn mixture and expand the lean burn limit effectively. Thermodynamic development test was carried out on the single cylinder engine. 52.5% of high indicated thermal efficiency was achieved by optimizing the valve timing angle， intake-port turbulence intensity， pre-chamber geometry parameters.
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