What is AdBlue ?
AdBlue is a registered trade mark of Diesel Exhaust Fluid owned by German Association of the Automobile Industry (VDA- Verband der Automobilindustrie). It is a colourless, non-toxic mixture of 32.5% highly purified Urea & 67.5% of deionized water. Tolerance range of the urea concentration is 31.8% – 33.2%. (it can be measured by a Refractometer). Quality of the AdBlue is most important thig to perform the SCR (Selective Catalytic Reduction) system, therefore its regulated in the ISO standards 22241-1 to 4.
AdBlue is not a fuel or fuel additive. It has separate storing tank in the vehicle. AdBlue is playing the key role of SCR, emission systems as a NOx converter.
Storage of AdBlue
As per shelf life explained by ISO standards 22241-3,
- At temperatures up to 30 °C the product shelf life is minimum of 12 months;
- At temperatures up to 35 °C the product shelf life is minimum of 6 months;
AdBlue should be stored in a right condition to maintain its quality. It should store between -6 °C to 25 °C, also keep away from direct sunlight. Even the containers are used to keep the AdBlue must be cleaned & sealed to avoid contaminated with other foreign materials.
Urea solutions are harmful to the groundwater and also it will helps to corrode the metals (copper, bronze, iron, aluminum). Therefore, make ensure to keep AdBlue in a proper placed even it’s a non-hazad liquid.
-11 °C is the freezing point of AdBlue solution. Even the AdBlue solution is freeze, it will not will effect to the start the engine. It will thaws quickly once start the engine and quality of the AdBlue will not be effected even it gets freeze.
How to refill AdBlue
You can find separate tank in your vehicle with blue colour cap for the AdBlue. You must always ensure to clean the surface of top of the tank before refill the tank. Even the small foreign material can effect to your vehicle SCR system.
Use dedicated spout only while filling the AdBlue from container to AdBlue tank. Don’t use funnels which contaminated oil or fuel to fill the AdBlue.
Make sure to stop your engine before refill the AdBlue, to avoid the any harm to your fuel system.
Average AdBlue consumption is 4% – 6% from diesel usage. But its depends with vehicle operation, duty cycle, geography, load ratings, etc. if we assumed AdBlue usage is 5% of fuel usage we can say 20:1 is the ratio of AdBlue usage. It means every 100liters of diesel requires 5liters of AdBlue will be consumed.
What will happen if drives without AdBlue
Driver will notify the AdBlue level of the vehicle in cluster panel. He will get alarm when the AdBlue level getting low. He must refill the AdBlue before its get empty. Once it’s getting low vehicle ECU will limit the vehicle performance (torque limitation). If the driver continuous the drive without refilling. Engine will get stop after alarming. After the engine gets stop, need to call authorized agent to restart the engine after refill the AdBlue by using their scanner tool. Therefore, all the drivers must ensure to refill the AdBlue tank before engine get stop.
What will happen if use low quality AdBlue
Low quality AdBlue will seriously effects to the Catalytic converter & AdBlue injector. Urea will crystalize on the Catalytic converter & injector. Crystalize injector will not inject the AdBlue solution as per vehicle ECU requires. When the level of NOx goes high, vehicle will limit its performance.