A
urea solution is a liquid that contains urea, a compound found in urine. It is commonly used in medicine, agriculture, and industrial applications.
Full definition
The other is a urea - based injection system (using an
aqueous urea solution called AdBlue, the genesis of the BLUETEC name).
It's Volkswagen's SCR (Selective Catalytic Reduction) technology that gets the Caddy over the line for Euro6 NOx emissions by injecting
AdBlue urea solution into the exhaust gasses.
«AdBlue ®» is an aqueous
urea solution which converts the nitrogen oxides (NOx) in the SCRcatalytic converters into harmless nitrogen through a process of reduction.
Nuclear Overhauser effect (NOE) measurements with a 7 molar
urea solution of the amino - terminal 63 - residue domain of the 434 - repressor and distance geometry calculations showed that the polypeptide segment 54 to 59 forms a hydrophobic cluster containing the side chains of Val54, Val56, Trp58, and Leu59.
The Caddy van engine range is all Euro 6, and it's Volkswagen's SCR (Selective Catalytic Reduction) technology that gets the Caddy over the line for NOx emissions by injecting AdBlue
urea solution into the exhaust gasses.
The method uses an aqueous
urea solution bearing the tradename «AdBlue» to convert the NOx into harmless nitrogen via various chemical reactions in a special SCR (selective reduction) catalyst that has been optimized for NOx reduction.
Two doctoral students in Bach's team are currently investigating various AdBlue injection procedures with a view to achieving the most optimal nebulization and homogenous distribution of the aqueous
urea solution in the exhaust gas.
All diesel engines will employ exhaust gas treatment technology including a diesel particulate filter, NOX absorber catalyst and SCR (Selective Catalytic Reduction) system, which
uses urea solution (AdBlue) injection to effectively reduce nitrogen oxides in the car's exhaust gases.
Adblue, Mercedes says, «is an aqueous
urea solution which is sprayed into the exhaust system in precisely metered quantities.
Empa makes significant contributions in this sector with a high - temperature flow lab by studying in detail the injection behavior of AdBlue, an
aqueous urea solution that is injected into the exhaust gas in new diesel vehicles.
The required
AdBlue urea solution, available at filling stations and Opel dealerships, is stored in a tank, which can be topped up as required via a nozzle alongside the car's fuel filler cap.
For this purpose, typically
an urea solution (AdBlue ®) is injected into the exhaust gas section upstream of the catalytic converter.
This engine requires an exhaust treatment system that relies on
a urea solution called diesel exhaust fluid (it gives pollutants in the exhaust a chemical to react with to turn them into less harmful emissions).
SCR requires
a urea solution called diesel exhaust fluid that must be refilled roughly every 10,000 miles.
Note also, however, that the Passat Alltrack does require an aqueous
urea solution, such as AdBlue, to be added at regular intervals.
Then an ultra-fine spray of
urea solution is dispersed into the exhaust stream.