About DEF (AUS 32)

how to save DEF (AUS 32)

and how you can best reduce the toxic gases, using the BE-Fuelsaver (PINOX)

 

About DEF (AUS 32) and the new generation of trucks

Since 2012, most of the heavy vehicles, including trucks and buses, come to rely on SCR technology. For these engines, the use of DEF is required, as well as the diesel S-10.

What is the DEF (AUS 32)?
DEF is the short form for "Diesel Exhaust Fluid". The name also can be AUS 32 (aqueous urea solution). The number 32 refers to the concentration level of the urea solution (32.5%) in demineralized water. It operates in exhaust systems to reduce emissions of nitrogen oxides (NOx).

Diesel engines can be run with a lean burn air-to-fuel ratio (overstoichiometric ratio), to ensure the full combustion of soot and to prevent the exhaust of unburnt fuel. The excess of air necessarily leads to generation of mono-nitrogen oxides (NOx), which are harmful pollutants, from the nitrogen in the air. Selective catalytic reduction is used to reduce the amount of NOx released into the atmosphere. Diesel exhaust fluid (DEF) from a separate tank is injected into the exhaust pipeline, where the aqueous urea vaporizes and decomposes to form ammonia and carbon dioxide. Within the SCR catalyst, the NOx are catalytically reduced by the ammonia (NH3) into water ( H2O) and nitrogen (N2), which are both harmless; and these are then released through the exhaust.

DEF is a 32.5% solution of urea, (NH2)2CO. When it is injected into the hot exhaust gas stream, the water evaporates and the urea thermally decomposes to form ammonia and isocyanic acid.

The onboard computer (OBD - On Board Diagnosis) with its sensor system measures the quality of the vehicle emissions and will alert the driver that he has 48 hours to supply the DEF reservoir 32. Otherwise, the vehicle will lose power up to a 40% limit.

The expected average consumption is around 5% of diesel consumption and may vary depending on vehicle use and traffic conditions. There are used about 5 liters of DEF or AUS 32 for every 100 liters of diesel.

A Petrobras researcher tested engine emissions with and without the DEF. Concluded that the truck which does not use the additive, pollutes up to five times more, that is, a five-fold increase in emissions when not used DEF injection system 32.

"Air pollution, especially pollution by diesel, is known to cause respiratory disease, myocardial infarction, lung cancer and low birth weight," explains a professor of Medicine at USP.

The law states that all new trucks must use the DEF, to reduce pollution.

The average consumption of DEF is about 5% of fuel consumption.


And now the good news:
With the BE-Fuelsaver (PINOX), your engine has a more complete fuel combustion, which lowers the soot by up to 85% and the emission of toxic gases (CO, HC, NOx, ...) up to 99%, and therefore automatically the SCR system injects less DEF and thereby saving up to 80% DEF (AUS 32).

 

     

(Arla is the portugues name for DEF (AUS 32))