AdBlue: What It Is And Its Uses

AdBlue is the trade name of a solution called Diesel Exhaust Fluid (DEF). Is an aqueous solution comprised of 32.5 percent urea and deionized water (67.5 percent). The liquid is used to reduce emissions of nitrogen monoxide (NO) and nitrogen dioxide (NO2) that occur as pollutants from burning fuel for diesel engines that use selective catalytic reduction system.

AdBlue fluid is injected directly into the exhaust and from the chemical reaction toxins are broken down into pure nitrogen and water vapor. In short, modern diesel engines use AdBlue to reduce emissions.

The AdBlue solution is colorless has no odor and is not flammable. The main substance of the AdBlue, urea CO (NH2) 2 are obtained by industrial methods, wherein the combined carbon dioxide (CO2) and the ammonia (NH3) are combined at elevated temperatures and pressure. The resulting substance is solid urea, in the form of colorless crystals soluble in water.

AdBlue has a freezing temperature of -11 degrees, but the systems mounted on the vehicle have an electrical resistance heating fluid if necessary.
AdBlue is used for years for heavy trucks, and in a little time migrated on cars equipped with diesel engines of the latest generation. Today, almost any modern diesel car has an AdBlue tank. Automakers use this solution to meet Euro 6 emission standards.

AdBlue it is not additive and not added to the fuel. It is a separate solution, stored in an additional tank. Upon delivery, the car has full tank of AdBlue and usually has a sufficient reserve to last until the next revision. If it is necessary for the AdBlue tank to be refilled, the trip computer will issue a warning 1000 km before tank is empty. The engine will run until the AdBlue tank is empty, but if it will not be filled, the engine cannot be started.

Normally, to reset the system and allow the engine to start again a minimum of four liters of AdBlue are needed. Adding AdBlue is made easy through dedicated a tank cap. It is located in the trunk or near the diesel. For more details, consult the car manual. Some manufacturers recommend using up all containers used to fill the AdBlue. If liquid remains unsealed in the container, it loses its purity.

AdBlue consumption varies depending on diesel consumption and distance traveled. In the world of carriers, a truck that uses AdBlue consumes on average about 1-1.5 liters of AdBlue per 100 km traveled. The trucks have 60-liter AdBlue tanks, so a full colorless solution is sufficient for 6000 km.

If given a BMW X5 3.0-liter diesel engine, a full tank of AdBlue is enough for 15,000 kilometers traveled. Mercedes-Benz says that a liter of AdBlue is enough for 1000 km.

This may be good news for America, where the availability of diesels is confined to work trucks, utilities, and very few passenger cars. Europeans have embraced diesels for years now and that can be seen on the roads: they are everywhere, including high performance cars. Maybe now the Americans will change their minds about diesels.

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