摩托车排气管放炮原因分析及处理方法（Cause analysis and treatment method of motorcycle exhaust pipe blasting）.docVIP

摩托车排气管放炮原因分析及处理方法（Cause analysis and treatment method of motorcycle exhaust pipe blasting） Cause analysis of motorcycle exhaust pipe blasting What is the exhaust pipe blasting: vehicles occurred during the start-up and running, because the air-fuel mixture enters the exhaust pipe and muffler, exhaust in the face of Mars or the exhaust pipe at high temperature and high pressure, so that the rapid combustion of fuel mixture (because the exhaust pipe space is limited), the formation of a high pressure gas out out, resulting in shooting phenomenon (i.e. exploding in a limited space). First: improper adjustment of the carburetor. The mixture is too dense to burn sufficiently, and the residual combustible mixture enters the exhaust pipe, resulting in blasting. Second: spark plug intermittent ignition. When the spark plug, the electric fire is bad or the fire is broken, the combustible mixture which is not ignited is discharged into the exhaust pipe, and a high temperature and high pressure exhaust gas which is discharged by a combustion working cycle is ignited to cause the blasting. Third: ignition coil fault. Ignition coil damp or leakage, in fact, is a circuit fault, even if the CDI, high pressure packages and spark plugs are normal, it will cause ignition instability or fire, resulting in shooting. Fourth: valve timing faults (relative to four impact engines). Four, the engine valve gap is not correct, the valve ablation is not close, the overlap angle of the valve is too large, the timing gear is not installed, causing the exhaust valve to open early, resulting in the phenomenon of gun. Fifth: the ignition time is too late. In the case of incomplete combustion of a combustible mixture in the cylinder, the exhaust port has been opened, causing the unburned combustible mixture to continue burning in the exhaust pipe and causing a blasting. ********************************************************************************************************************************* A