2023年第4期某汽油发动机异常早燃信号问题的分析解决马瑞瑄,钮海雷,张帅,杨红天(长城汽车股份有限公司,蜂巢易创科技有限公司,河北保定071000)摘要:保护发动机的早燃控制策略是通过爆震传感器采集到相对一般爆震的振幅增大的信号,该信号的积分值超出早燃阈值,及该信号发生在判定早燃时间窗口区域内。本文论述了一种因发动机排气歧管垫片热胀冷缩后,产生异常振动,爆震传感器将该振动信号误判为早燃导致的振动信号。通过对排气歧管垫片进行优化设计,最终解决了异常振动的产,为其他汽油发电机早燃问题、排气歧管振动问题的排查解决通过了参考依据。关键词:汽油发动机;早燃;排气歧管垫片;振动中图分类号:U464文献标识码:A文章编号:1674-957X(2023)04-0046-03AnalysisandSolutionofAbnormalPreignitionSignalofaGasolineEngineMaRui-Xuan,NiuHai-lei,ZhangShuai,YangHong-tian(GreatWallMotorCo.,Ltd.,HYCETTechnologyCo.,Ltd.,Baoding071000,China)Abstract:Theearlyburningcontrolstrategyofprotectingtheengineistocollectthesignalwhichislargerthantheamplitudeofthegeneralexplosionthroughtheexplosionsensor,andtheintegralvalueofthesignalex-ceedstheearlyburningthreshold,andthesignaloccursintheearlyburningtimewindowarea.Thispaperdis-cussesakindofabnormalvibrationcausedbythethermalexpansionandcoldcontractionoftheexhaustmanifoldgasketoftheengine.Theexplosionsensormisjudgesthevibrationsignalasthevibrationsignalcausedbyearlycombustion.Thr...