关键词: 迈腾 B8L；发动机；怠速抖动；故障诊断

Abstract: Through the analysis of the failure phenomenon of the idling jitter of the Magotan B8L car, combined with engine system control logic and the auxiliary test of automobile special equipment, the fault diagnosis and elimination of engine idling jitter was completed finally. The faults involve the engine ignition system, intake system and fuel injection system, which are comprehensive and representative. During analysis and diagnosis, the basic idea of engine system fault diagnosis and its control logic was demonstrated and it has certain reference value for teachers and students of vocational colleges and maintenance personnel. At the same time, fault diagnosis ideas and the analysis of fault mechanism have certain reference significance for other aspects of engine fault maintenance.

Key words: Magotan B8L; Engine; Idling jitter; Fault diagnosis