What is the Function of Diesel Exhaust Fluid?
2 Answers
Diesel Exhaust Fluid (DEF) serves purposes such as exhaust purification and cost reduction. Specific details about DEF are as follows: 1. Exhaust Purification: It reacts with nitrogen oxides in the exhaust, reducing nitrogen oxide emissions. 2. Cost Reduction: It can be used to optimize engine performance and fuel consumption, reducing diesel consumption by up to 6%, significantly lowering costs. 3. DEF is an essential additive for SCR (Selective Catalytic Reduction) systems. The SCR system operates as follows: when nitrogen oxides are detected in the exhaust pipe, the DEF tank automatically sprays diesel exhaust fluid, which then reacts with nitrogen oxides in the SCR catalytic reaction tank through redox reactions, producing non-polluting nitrogen and water vapor that are expelled.
I've always driven diesel vehicles, and the primary function of AdBlue (diesel exhaust fluid) is to help treat harmful substances in the exhaust, making the vehicle more environmentally friendly and compliant. If you don't use it, emissions will exceed standards, potentially resulting in fines and contributing to air pollution. From my personal experience, using AdBlue effectively reduces nitrogen oxides (NOx), which are major contributors to poor air quality, especially during severe summer haze. When driving long distances, toll stations often check emission data—having sufficient AdBlue ensures a smooth pass, saving a lot of hassle. Additionally, it doesn’t harm the vehicle itself; instead, it protects the SCR system and extends its lifespan. The only catch is the need for regular top-ups—check the fluid level every few thousand kilometers and refill it for peace of mind. Remember, don’t wait until the warning light comes on to refill, or you might face trouble on the road.
