Def fuel tank

August 13, 2024

A DEF (Diesel Exhaust Fluid) tank is a component in modern diesel engines, specifically in vehicles that use selective catalytic reduction (SCR) technology to meet emissions standards. DEF is a solution made of 32.5% urea and 67.5% deionized water, which is injected into the exhaust stream to reduce nitrogen oxides (NOx) emissions into nitrogen and water vapor.

Here's a brief overview of the DEF tank's role and function:

Storage: The DEF tank holds the Diesel Exhaust Fluid, which is used in the SCR system.

Injection: The fluid is delivered from the tank to the SCR system where it is injected into the exhaust gases.

Emissions Control: In the SCR system, DEF reacts with NOx emissions to break them down into less harmful substances.

Maintenance: The DEF tank needs to be refilled periodically, and the system often includes sensors to monitor fluid levels and quality.

Proper maintenance of the DEF system is crucial for compliance with emissions regulations and for the smooth operation of the diesel engine.

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Ms. Susana Yan

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