Diesel Exhaust Fluid Explained
Diesel Exhaust Fluid (DEF) is used in every modern diesel-powered engine vehicle and is essential for reducing harmful emissions. If your vehicle’s DEF tank runs out of fluid, it will trigger a warning light, and your vehicle’s performance will be limited until the tank is refilled. In this article, we will explain what DEF is, how it works, and why it is essential for modern diesel engines.
What Is DEF Fluid?
Diesel Exhaust Fluid (DEF) is a non-toxic, colorless, and odorless solution that consists of purified water and urea. It is injected into the exhaust system of your diesel engine to reduce nitrogen oxide (NOx) emissions.
DEF is not a fuel additive and is not mixed with diesel fluid, but rather stored in a separate tank in the vehicle and is injected into the exhaust system when needed.
How Does DEF Fluid Work?
The SCR technology utilizes DEF to convert harmful nitrogen oxides into harmless nitrogen and water vapor through a chemical reaction. When diesel fuel burns in the engine, it produces nitrogen oxides as a byproduct. The exhaust gases containing NOx pass through the SCR catalyst, where DEF is injected.
Why Do You Need DEF Fluid?
In 2010, the Environmental Protection Agency released the Diesel Emission Reduction Act (DERA), requiring all new diesel vehicles to feature a selective catalytic reduction (SCR) system, which removes up to 90% of pollutants from diesel exhaust, significantly reducing the negative effects of nitrogen oxides in the atmosphere.
Benefits Of Using DEF Fluid
While it is a legal requirement, Diesel Exhaust Fluid has several benefits for diesel engines.
Environmental Protection
DEF reduces the amount of harmful emissions that your vehicle emits, making it more environmentally friendly.
Improved Fuel Economy
DEF can improve your vehicle’s fuel efficiency by up to 5%. This is due to the SCR system reducing the amount of fuel needed to power the engine by optimizing the combustion process.
Engine Logevity and Performance
Running DEF can reduce your maintenance costs by keeping the exhaust system clean, resulting in fewer repairs and longer service intervals.
When Should You Refill Your DEF Tank?
Most diesel vehicles will alert you when the DEF tank is running low. The warning light typically comes on when the tank is about 20% full, and you should refill the tank as soon as possible. Ilimited performance mode
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