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燃料空气比对汽油机排气中的未燃碳氢化合物、一氧化碳和氧化氮的含量有决定性影响.因此,从装置的角度来看汽化器的配剂精度对空气污染又增加了重要性. 半个多世纪以来,在火花点火汽车发动机上,几乎都是用浮子式汽化器来配剂燃油和空气.固定式的空气喉管并具有固定的燃油量孔及渗入空气已经占大多数.这种系统比较简单,运动件少,并有在长时间里稍加保养就能保持其配剂精度的优点.
The fuel-to-air ratio has a decisive influence on the content of unburned hydrocarbons, carbon monoxide and nitrogen oxides in the exhaust of a gasoline engine, and therefore the accuracy of the carburetor compounding increases the importance of air pollution from a plant standpoint. Over the centuries, almost all spark ignition carburetor engines used float-type carburetors to dispense fuel and air, and fixed-air hoses with a fixed fuel orifice and infiltration air accounted for the majority. The system is relatively simple , Less moving parts, and in a long time a little maintenance can maintain the advantages of its precision dispensing.