What is Diesel Exhaust Fluid, or DEF?
Diesel Exhaust Fluid (DEF) is general public product name of North America, is a reactant that’s key to the SCR process. It’s a nontoxic, aqueous solution of 32.5% urea and 67.5% water.
DEF = AdBlue
How about the AdBlue/DEF QC?
For assuring our clients of the best quality, each batch of AdBlue/DEF has to be inspected by a valuable instrument (Inductive coupled plasma) before shipping, thus the contents of the impurities are under well controlled and detected. Base on this inspection, your SCR system is protected, not only reducing the emissions but also extending the lifetime of your vehicle.
AdBlue/DEF and diesel will be confused?
Cylinder diesel nozzle diameter of the cylinder is larger than AdBlue / DEF injection pipeline, so diesel will not be injected into the cylinder AdBlue/ DEF. On the contrary the situation will never arise because there are AdBlue/ DEF cylinder magnets, the magnet can only open the AdBlue / DEFnozzle valve. If there is no cylinder diesel magnet, AdBlue/ DEF nozzle valve would not be opened and will not provide AdBlue/ DEF injection
Has SCR-technology been chosen by all heavy-duty vehicle manufacturers?
For Euro 4: no, not all manufacturers opted for SCR technology. MAN chose the EGR (Exhaust Gas Recirculation) technique and Scania decided in favour of the EGR technique for most of its models as well. All other manufacturers have chosen for SCR technology at the stage of Euro 4.
For Euro 5: yes, all manufacturers - including MAN and Scania - have decided to implement the SCR technique, which requires the use of AdBlue.
What are the advantages of the SCR technology?
Reliability: the SCR technique has proven to be absolutely reliable during extensive testing in the last few years.
Solution for the longer term: with SCR technology Euro 4 and Euro 5 standards can easily be met. New, still to be developed emission standards will also require this technology.
Less fuel consumption: due to the possibility of tuning the diesel engines in a more economical way, an average fuel saving of 5 % can be realised.
What are the disadvantages of SCR technology?
You are obliged to use AdBlue.
The new vehicles are more expensive. But so are vehicles equipped with other techniques in order to comply with emission standards.
What makes AdBlue so special?
AdBlue is an extremely pure solution. Heavy duty vehicle manufacturers demand this level of purity of AdBlue, because of the warranty they give on their vehicles.
What is AdBlue’s storage life?
The maximum storage period is 1 year, under the condition of storage of AdBlue in the correct way. Temperature is a very important factor in this, as well as sealed packaging and a dry and well-ventilated storage space.
What happens if a heavy duty engine runs without AdBlue?
This will result in crossing the allowed emission levels; for the diesel engine runs in a fuel optimized way, which has a negative impact on the Nox emission. For that reason sensors are placed in the exhaust pipe to measure the Nox emission. The measurement results are stored in the OBD-system (On Board Diagnostic) and are periodically controlled.