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October 16, 2021

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Stef Speek

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What is the function of AdBlue?

Many modern diesel vehicles use AdBlue to meet emission standards. This applies not only to trucks, heavy commercial vehicles, ships and tractors, but also to different types of passenger cars. But what is AdBlue and how does it work? In this article we will elaborate on this in more detail. What is AdBlue? AdBlue is a clear mixture of demineralised water and pure urea (32.5%) and is also referred to as Diesel Exhaust Fluid or AUS 32. It is designed to reduce harmful emissions of nitrogen oxides (NOx) from diesel vehicles to non-hazardous gases, in order to comply with more stringent emission standards. When is AdBlue used? AdBlue is used in vehicles with a Selective Catalytic Reduction catalyst, or SCR. An SCR catalyst ensures that exhaust gases are treated before they leave the vehicle. A large proportion of the heavy-duty vehicles complying with the Euro 4, Euro 5 and Euro 6 standards are equipped with an SCR system and therefore use AdBlue. This applies to most trucks after 2005; the first passenger cars with diesel engines and SCR were introduced in response to the Euro 6 standard in 2014. An SCR is located behind the particulate filter in the exhaust. […] read more
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