汽油是一种易挥发的液体，在常温下燃油箱经常充满蒸气，汽油罐燃料蒸发控制系统的作用是将蒸气引入燃烧并防止挥发到大气中。这个过程起重要作用的是活性碳罐贮存装置，因为活性碳有吸附功能，当汽车运行或熄火时，燃油箱的汽油蒸气通过管路进入活性碳罐的上部，新鲜空气则从活性碳罐下部进入活性碳罐。发动机熄火后，汽油蒸气与新鲜空气在罐内混合并贮存在活性碳罐中，当发动机启动后，装在活性碳罐与进气歧管之间的燃油蒸发净化装置的电磁阀门打开，活性碳罐内的汽油蒸气被吸入进气歧管参加燃烧。 采用非粘结成型活性炭专有技术。改变传统用煤焦油、淀粉等传统粘结剂成型的办法。不含粘结剂成份，完全靠炭分子之间的亲和力和原料本身的特殊性质。科学配方，制作而成，有效避免炭孔堵塞，充分发挥丰富发达炭孔的吸附功能。（图/文http://www.wxfengli.com/）
（中译英）
 Petrol is a volatile liquid at room temperature, the fuel tank is often full of steam, fuel evaporation control system is the role of the vapor is introduced into the combustion and to prevent the volatilization to the atmosphere. This process plays a significant role in the activated carbon canister storage device, because the active carbon adsorption function, when the vehicle is running or stopped, the fuel tank gasoline vapor through the line and into the upper portion of the activated carbon canister, fresh air from the activated carbon canister into the activated carbon canister. After flameout of engine, the gasoline vapor and fresh air in the mixture within the tank and stored in the canister, when the engine starts, mounted on the carbon canister and an intake manifold between the evaporated fuel purging device for electromagnetic valve is open, active carbon tank of gasoline vapor is sucked into the intake manifold to the combustion. Using a bond formed activated carbon technology. Change the traditional coal tar, starch and other traditional binder forming method. Containing no binder composition, completely on carbon molecular affinity between the material itself and the special properties of. Scientific formula, production, effectively avoid carbon porous plug, give full play to the rich developed pore adsorption function.