The AdBlue^® is injected into the exhaust pipe between the engine and the SCR catalyst. When it heats up in the exhaust pipe, the AdBlue^® decomposes into ammonia. The nitrogen dioxides (NOx) in the exhaust fumes react with the ammonia in the catalyst to form nitrogen, the main component of the air we breathe, and steam.

Is AdBlue constantly injected?

AdBlue is not injected into the engine as a fuel additive. It is added to the catalyst system in the car's exhaust system. AdBlue is consumed in proportion to engine usage. It is estimated that a passenger car will consume approximately 1.5 litres of AdBlue for every 620 miles.

How does a DEF injector work?

Small quantities of diesel exhaust fluid (DEF) are injected into the exhaust upstream of a catalyst, where it vaporizes and decomposes to form ammonia and carbon dioxide. The ammonia (NH3) is the desired product which in conjunction to the SCR catalyst, converts the NOx to harmless nitrogen (N2) and water (H2O).

How does AdBlue quality sensor work?

The ultrasonic sensor (transceiver) is used to send out sonic pulses to the reflection baffle and then reflect back to the sensor. The average time of flight (TOF) is calculated through multiple cycles. The TOF is almost constant at a fixed temperature and a urea concentration of 32.5%.

What is an AdBlue sensor?

AdBlue level sensors take the guesswork out of the equation. These sensors detect the level of fluid in the tank and relay the information to the ECU. Depending on the input, the ECU can: allows the vehicle to operate normally .

How does the Adblue SCR DEF system work? Explained Diesel Exhaust Fluid Selective Catalyst Reduction

How does DEF fluid get injected?

DEF is sprayed into the exhaust stream by an advanced injection system and then converted into ammonia on a catalyst. The ammonia breaks down dangerous NOx emissions produced by diesel engines into nitrogen and water.

Can you bypass DEF system?

If you're thinking of bypassing any of your diesel's emission controls, remember that that it's highly illegal and the fines can be steep. The chances of getting caught may be low, but the consequences are costly.

Where is the AdBlue injector located?

AdBlue injector is located on exhaust pipe close to the place where exhaust is connected to subframe. It has easy access and only requires for car to be lifted safely. It's held by clamp secured with 4mm allen bolt.

What is a urea injector?

SCR technology use the injection of a liquid urea water solution (UWS) into the exhaust system. The hot exhaust evaporates the UWS and the remaining to generate become ammonia. Ammonia vapor is then used to reduce nitrogen oxides (NOx) in a catalytic converter.

What happens if you put diesel in AdBlue tank?

If you start up with an AdBlue^® tank filled with Diesel, you risk causing very serious damage to your vehicle's SCR system. If you do start up, you vehicle will begin to behave strangely. Park up as soon as possible to avoid causing more damage to your car.

Can a diesel engine run without AdBlue?

Without AdBlue, most modern diesel engines will automatically de-rate and won't operate beyond moving the truck off the road.

Is AdBlue made of pig urine?

Is AdBlue® made from pigs' urine? AdBlue® is a synthetic, highly purified solution of urea and demineralized water NOT pigs urine. Whilst the chemical urea is in pigs' urine, it is found in much lower concentration alongside many other elements.

Can you bypass the AdBlue system?

Disabling the AdBlue system is normally completed by reprogramming the engine management system, however some vehicles will require a small electronic unit to be hardwired into the vehicle.

How does a DPF regenerate?

DPF active regeneration

Active regeneration happens when extra fuel is injected automatically as the filter reaches an approximately 45% full limit. The extra fuel raises the temperature of the exhaust and burns off the stored soot. Yet the journey has to be long enough to complete a full cycle.

Can you run water in DEF?

If you put water in an EMPTY DEF tank, there will be no urea injected into the exhaust to convert to ammonia. Ammonia is an essential requirement to eliminate NOX (Oxides of Nitrogen) via the SCR (Selective Catalytic Reducer).

Does DPF back exhaust do anything?

A Manta Performance DPF back exhaust is an excellent solution. Improve your DPF-equipped vehicle's sound while reducing its restrictiveness with a Manta Performance DPF back exhaust system.

Can you clean DEF doser valve?

You can either can get it cleaned at a dealership or repair facility, or you can do it yourself. Cleaning the doser valve yourself can be relatively straightforward and cost-effective. You just need some basic hand tools and brass bristled brush.

What does the doser valve do?

During active regeneration, the doser valve injects a fine mist of fuel into the exhaust stream, where it then ignites on the surface of the DOC to raise the exhaust temperature and oxidize the particulate matter in the CDPF. The Doser assembly also includes a fuel pump and filter.

What is a DEF doser pump?

As everyone knows Diesel Exhaust Fluid (DEF) Pumps are now in use on every aftertreatment system out there today on the modern heavy-duty vehicle. They are used to supply pressurized fluid to the doser injector so it can deliver the fluid in an atomized spray into the selective catalyst reduction (SCR) chamber.

Does AdBlue damage plastic?

AdBlue damages surfaces such as painted vehicle parts, plastic, items of clothing and carpets and should be removed as quickly as possible using a damp cloth and plenty of cold water.

Where does urea come from for AdBlue?

Urea is produced synthetically from ammonia and CO₂ (carbon dioxide), from which Yara's AdBlue is extracted directly as "hot melt" urea, which uses a different process from fertilizer grade urea.

Does AdBlue damage paint?

AdBlue^® is not a hazardous product, but it can damage the surfaces it comes into contact with. If you spill AdBlue^® inside a vehicle, on a painted surface or on your clothes, rinse immediately with clean water to prevent stains from forming.