There are generally three reasons for the formation of carbon deposition: 1. Long idle operation and low-speed driving. 2. Long time and short distance driving. 3. Use gasoline whose purity and quality cannot meet the requirements

积炭对发动机的影响：1.冷启动困难，冷车怠速达不到规定的转速，严重时冷车怠速会熄火，热车后怠速低2.发动机动力下降，加速不畅，油耗增加。3.发动机尾气排放变差，同时也会缩短火花塞，氧传感器，三元催化器的使用寿命4.积炭也会造成发动机的活塞环的卡滞，影响活塞环的密封性能，造成机油消耗量增加，导致发动机烧机油，缩短发动机的使用寿命

The impact of carbon deposition on the engine: 1. It is difficult to start cold, and the idle speed of the cold car cannot reach the specified speed. In severe cases, the cold car will stall at idle speed, and the idle speed is low after hot car. 2. The engine power decreases, the acceleration is not smooth, and the fuel consumption increases. 3. The engine exhaust emission becomes worse, which will also shorten the service life of spark plug, oxygen sensor and three-way catalyst. 4. Carbon deposition will also cause the piston ring of the engine to jam, affect the sealing performance of the piston ring, increase the oil consumption, cause the engine to burn oil and shorten the service life of the engine

二清除积炭的方法和效果：定期清洗一般分为三个步骤，喷油嘴和进气道的清洗可以清除部分积炭，并能够软化深层的积炭，燃油添加剂加到油箱中可以持续地清洗积炭，回复喷油嘴的雾化效果，保持油路畅通，恢复发动机的动力，消除发动机冷启动困难，怠速不稳等故障，提高燃油的经济性，延长火花塞，氧传感器，三元催化器，发动机的使用寿命

II. Methods and effects of removing carbon deposits: regular cleaning is generally divided into three steps. The cleaning of fuel injection nozzle and air inlet can remove some carbon deposits and soften the deep carbon deposits. Adding fuel additives to the oil tank can continuously clean the carbon deposits, restore the atomization effect of fuel injection nozzle, keep the oil circuit unblocked, restore the power of engine and eliminate the difficulty of cold start of engine, Unstable idle speed and other faults can improve fuel economy and prolong the service life of spark plug, oxygen sensor, three-way catalyst and engine

三预防积炭生成的措施：根据厂家的使用说明书选择适合本车型标号的汽油，但需要说明汽油标号代表的是汽油的辛烷值，放映的是汽油的抗爆性，汽油的标号和汽油的品质不能相提并论，建议到正规信誉好的加油站加油。

III. measures to prevent carbon deposition: select the gasoline suitable for the model label according to the manufacturer's instructions, but it should be noted that the gasoline label represents the octane number of gasoline and shows the antiknock performance of gasoline. The gasoline label and gasoline quality cannot be compared. It is recommended to refuel at a regular and reputable gas station.

避免长时间发动机怠速运转，长时间低速运行的车辆，应经常跑一跑高速，高速行驶能够使混合充分燃烧，提高燃油的经济性，并且可以减少积炭的生成，恢复氧传感器的灵敏度，清洁火花塞电极间和三元催化器表面的积炭。

Avoid idling the engine for a long time. Vehicles running at low speed for a long time should often run at high speed. Driving at high speed can fully burn the mixture, improve the fuel economy, reduce the generation of carbon deposit, restore the sensitivity of oxygen sensor, and clean the carbon deposit between spark plug electrodes and the surface of three-way catalyst.