How is the throttle carbon deposit caused?

Throttle carbon deposition may be due to poor fuel quality and poor air quality, resulting in incomplete fuel combustion. Oil leakage from oil seal, pumping failure of recovery system, poor road conditions, slow vehicle speed, long time for the engine to reach normal temperature, and slow evaporation of gasoline after spraying on the back of the valve may be one of the reasons. In addition, due to a series of reasons such as engine oil failure, cylinder pressure problem, water leakage on the cylinder bed, carbon deposition may also occur. There are two main reasons for carbon deposition in throttle: 1. In the working process of the starter, when the fuel oil and the oil vapor in the fire extinguishing chamber cannot be completely extinguished, carbon deposition will occur. 2. Gum (mainly composed of hydroxy acid, asphaltene and oil agent) appears. ) attached to the intake and exhaust valves, cylinder edges, spark plugs, flameout chambers, and accumulated layer by layer to form carbon deposits. At present, starter technology has made great progress, but carbon deposition should be actively prevented.