电喷汽油发动机起动困难故障诊断方法

Discussion on Methods of Starting Difficulty Fault Diagnosis of EFI Gasoline Engine

起动困难是电喷汽油发动机的常见故障,因为无论发动机处于冷态还是热态,都有着较为苛刻的起动条件,例如对发动机的空燃比、点火时刻以及点火能量等都有一定的要求,而且对蓄电池电压和起动机的转速等也有要求。因此对于电喷汽油发动机起动困难的故障要根据其故障现象和容易引起这些故障现象的相关因素进行分析和排除。结合实例详细阐述了常规的故障诊断和排除方法并提供了完善的诊断流程。

Starting difficulty is the common EFI gasoline engine fault, because whenever the engine is cold or hot, it must be started in many relatively harsh conditions, such as certain requirements of＂ the engine air-fuel ratio, ignition time and ignition energy, and the voltage of battery and speed of the starter have also been requested. So starting difficulty fault of EFI gasoline engine should be analyzed and excluded according to the fault phenomena and the relevant factors that easily lead to it, In this paper, detailed examples of the conventional method of fault diagnosis and exclusion are provided with a sound diagnosis process.