汽油发动机失火检测及标定方法  

Gasoline engine misfire detection and calibration methods

作　　者：谷加佩 郑文清 范永鹏 Gu Jiapei;Zheng Wenqing;Fan Yongpeng(SAIC GM Wuling Automobile Co.,Ltd.,Liuzhou 545000,China)

机构地区：[1]上汽通用五菱汽车股份有限公司,广西柳州545000

出　　处：《汽车知识》2024年第8期117-119,共3页AUTOMOTIVE KNOWLEDGE

摘　　要：发动机失火是售后常见的故障,我国从国五法规开始要求对失火进行准确的在线诊断,并且保证失火后的排放满足要求。本文以普通4缸机为例,研究了失火检测方法,选取目前最主流的角加速度检测法进行研究,详细梳理了角加速度法的理论,对失火检测功能实际应用中的齿偏差修正和燃烧噪音波动的消除进行了详细的说明,并结合实际开发经验阐述了系统自适应过程、阈值标定方法和失火检测抑制的相关条件。Engine fire is a common after-sales fault,our country from five regulations began to request the accurate online diagnosis of fire,and ensure that the discharge of fire to meet the requirements.Taking the ordinary 4-cylinder machine as an example,this paper studies the misfire detection method,selects the most mainstream angular acceleration detection method for research,comb out the theory of angular acceleration method in detail,and explain in detail the tooth deviation correction and the elimination of combustion noise fluctuation in the practical application of misfire detection function.Combined with practical development experience,the adaptive process of the system,the threshold calibration method and the related conditions of misfire detection and suppression are described.

关 键 词：失火检测 失火阈值标定 失火原因 处理方法 

分 类 号：U467.3[机械工程—车辆工程]