汽油发动机运转时出现异常声响,是常见的故障之一。总的来说,这是与发动机安装不妥、零件松动、因运动副磨损过甚而间隙过大、以及点火时刻不当等许多因素有关。诊断声响故障原因、判明故障发生部位乃至找出有问题的零件,目前大多是依靠人耳听诊来解决。汽油发动机是一部较为复杂的机器,其组成零件的材料有别、大小不一、形状各异、振动频率也各不相等,因而任何完善的汽油机运转时也不可避免的带有一定的声响。汽油机出现故 An unusual noise when the gasoline engine is running is one of the common faults. In general, this is related to improper installation of the engine, loose parts, excessive clearance due to wear of the sports shoes, improper ignition timing, and many other factors. Diagnosis of sound failure causes, identify the site of the fault and even identify the problem parts, most of the current rely on the human ear auscultation to be resolved. Gasoline engine is a more complex machine, the composition of parts of different materials, different sizes, different shapes, vibration frequency is also not equal, so that any perfect gasoline engine operation is also inevitable with a certain sound. Gasoline machine so it