161. ディーゼル排気液
ディーゼル排気液(DEF)は、選択触媒還元(SCR)システムを備える多くの現代ディーゼル車で、有害な窒素酸化物(NOx)排出を減らすために使用する液体です。欧州では一般にAdBlueという商品名で知られています。
ディーゼル燃料ではなく別タンクに保存されます。高純度尿素と水の溶液で、排気系へ噴射され、窒素酸化物をより有害性の低い物質へ変換するのを助けます。
What is diesel exhaust fluid used for?
Diesel exhaust fluid is used in vehicles equipped with an SCR system. It is injected into the exhaust gases to help reduce nitrogen oxide emissions produced by the diesel engine.
Is diesel exhaust fluid the same as diesel fuel?
No. Diesel exhaust fluid is not a fuel and must never be poured into the diesel tank. Vehicles that use it have a separate DEF tank, usually identified by a dedicated filler cap.
What should you do when the DEF warning appears?
Refill the DEF tank with fluid that meets the specification required by the vehicle manufacturer. Do not ignore the warning, because some vehicles can restrict operation or prevent restarting if the DEF supply becomes empty.

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