ANGAL ENTERPRISES

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MORE ABOUT UREA DOSER / UREA DOSING UNIT :

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Urea Doser System / Urea Dosing Unit is an important part of any selective catalytic reduction (SCR) system, accurately designed to reduce oxides of nitrogen (NOx) emissions while providing cheap cost of ownership, performance and reliability to any diesel engine manufacturer and the owners.

The doser System like in Tata , or injector, is a robust component that delivers an atomized urea and air mixture upstream of the SCR catalyst. The design allows injection in the center of the exhaust gas flow, which minimizes the risk of deposits and improves reliability. A relatively large orifice sizing in the nozzle also provides exceptional tolerance to contaminants.

SUPPLY UNIT

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The urea supply unit is a high-accuracy unit for injecting urea into the exhaust aftertreatment system. A control module calculates the exact dosing rate of urea based on various engine conditions, and the urea mixes with air from the vehicle compressed air system. Atomized urea is then sent through the injector into the exhaust system upstream of the SCR catalyst.

Aftertreatment Control Module.

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The Aftertreatment Control Module translates datalink-commanded dosing rates into supply module inputs to accurately deliver the required dosing quantities. The independent aftertreatment control module can also be used to control other engineered components in the engine or aftertreatment system.

How It Works?

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The Urea Doser System is a reductant delivery system that accurately injects a 32.5 percent solution of urea in water – also known as Diesel Exhaust Fluid (DEF) or AdBlue® – into the exhaust stream. When exposed to heat from the exhaust, the urea decomposes into ammonia. The ammonia reacts with the SCR catalyst, converting NOx in the exhaust stream into harmless nitrogen and water. To ensure performance and maximize the environmental benefits of the system, Cummins employs advanced control technology.