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What is AdBlue?

    2019-03-08


AdBlue converts harmful NOx from your diesel vehicle exhaust into harmless nitrogen and steam, therefore considerably reducing the emissions of nitrogen oxides (NOx) that are a major source of atmospheric pollution and that lead to smog in urban centers.
“SCR” is the name of a post-combustion technology treatment for diesel vehicles, which allows them to reduce their emissions of NOx (nitrogen oxides). SCR stands for Selective Catalytic Reduction. This technology requires the use of a reagent called AdBlue. Almost all of the main engine manufacturers have decided to use this technology to meet the requirements of new legislation on NOx (Nitrogen oxides) emissions.

The main components of the SCR system are the:
  • SCR catalyst
  • AdBlue Fluid injection unit
  • AdBlue tank
  • AdBlue injection control unit.
The AdBlue is injected from the AdBlue tank into the exhaust pipe, which is in front of the SCR catalyst, but downstream of the engine. As it is heated in the exhaust, the AdBlue changes into ammonia (NH3) and carbon dioxide (CO2). When the nitrogen oxide (NOx) gases from the exhaust pipe react inside the catalyst with the ammonia, the harmful NOx molecules in the exhaust are converted into harmless nitrogen and water, which is released to the atmosphere as steam.

These systems often have issues with control modules or systems blocking and causing limp modes. Some times it becomes uneconomical to fix AdBlue systems.

With Truck Explorer you have the ability to remove or stop AdBlue injection on Mercedes trucks (Euro5, Euro6).

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