FREQUENTLY ASKED QUESTIONS

Questions on SCR-technology (Selected Catalytic Reduction)

1. Have all heavy-duty vehicle manufacturers opted for SCR technology?

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 to use SCR technology at the stage of Euro 4.
For Euro 5: yes, all manufacturers – including MAN and Scania – have declared to implement the SCR technique, which uses AdBlue.

2. 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.
Tax reductions and subsidies: several European countries encourage compliance with Euro 4 and 5 standards by offering financial incentives. For instance, in Germany lowered road tolls result in a financial advantage of 2 to 3 Eurocents per kilometre.

3. 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.

Questions on the heavy duty vehicle manufacturers

4. When will the new vehicles be available?

At the beginning of 2005, the new heavy duty vehicles will be ready for delivery. Daimler Chrysler will be the first to deliver these trucks. A few other producers, like DAF and Volvo are expected to follow soon after.

5. Has this technology been field-tested?

Millions of kilometres have already been driven in order to test the new technology. It has also been tested under extreme weather conditions, in Spain and Finland.

6. What happens when a truck drives without AdBlue?

The emission levels will be exceeded many times over; for the diesel engine has been tuned 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 OBDsystem (On Board Diagnostic) and are periodically controlled.

Questions on AdBlue

7. 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.

8. What is AdBlue’s storage life?

The maximum storage period is 2 years, under the condition of storage in the correct way. Because the product has usually been kept in storage already for some time at Greenchem’s or the dealers’ premises, the customer will be informed that the storage period is 1 year. B.D. Fuels Ad Blue Solutions

Questions on availability

9. What is the best way of refuelling with AdBlue?

That depends on your personal situation. B.D.Fuels will be happy to discuss the most convenient way for you.
If you wish to receive more information on SCR/AdBlue technology, feel free to contact us directly at: Tel 01889 270088

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