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

積炭對發動機的影響：1.冷啟動困難，冷車怠速達不到規定的轉速，嚴重時冷車怠速會熄火，熱車后怠速低2.發動機動力下降，加速不暢，油耗增加。3.發動機尾氣排放變差，同時也會縮短火花塞，氧傳感器，三元催化器的使用壽命4.積炭也會造成發動機的活塞環的卡滯，影響活塞環的密封性能，造成機油消耗量增加，導致發動機燒機油，縮短發動機的使用壽命

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

二清除積炭的方法和效果：定期清洗一般分為三個步驟，噴油嘴和進氣道的清洗可以清除部分積炭，并能夠軟化深層的積炭，燃油添加劑加到油箱中可以持續地清洗積炭，回復噴油嘴的霧化效果，保持油路暢通，恢復發動機的動力，消除發動機冷啟動困難，怠速不穩等故障，提高燃油的經濟性，延長火花塞，氧傳感器，三元催化器，發動機的使用壽命

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

三預防積炭生成的措施：根據廠家的使用說明書選擇適合本車型標號的汽油，但需要說明汽油標號代表的是汽油的辛烷值，放映的是汽油的抗爆性，汽油的標號和汽油的品質不能相提并論，建議到正規信譽好的加油站加油。

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.

避免長時間發動機怠速運轉，長時間低速運行的車輛，應經常跑一跑高速，高速行駛能夠使混合充分燃燒，提高燃油的經濟性，并且可以減少積炭的生成，恢復氧傳感器的靈敏度，清潔火花塞電極間和三元催化器表面的積炭。

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.