本文分析了车用柴油机排气烟度异常形成的因素。排气烟度增大则使柴油机工作恶化、机件过早损坏、动力效率低、经济性差和污染环境。诊断时可采用问、看、听和试等方法,按故障部位的不同,采取调整、修复和更换等措施解决,以保证柴油机正常工作。 This paper analyzes the factors that cause the formation of abnormal exhaust smoke of diesel engine. Exhaust smoke increases the deterioration of diesel engine work, premature damage to parts, low power efficiency, poor economy and pollution of the environment. Diagnosis can be asked, watching, listening and test methods, according to the different parts of the fault, to take adjustments, repair and replacement measures to solve, in order to ensure the normal operation of diesel engines.