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Diesel exhaust fluid (DEF; also known as AUS 32 and sometimes marketed as AdBlue[3]) is a liquid used to reduce the amount of air pollution created by a diesel engine. Specifically, DEF is an aqueous urea solution made with 32.5% urea and 67.5% deionized water.
This article explains how DEF (Diesel Exhaust Fluid) works in conjunction with the SCR in diesel engines and how the EPA regulations affect truck owners.
It’s called DEF for short, but the very first thing you may be wondering is what on earth is diesel exhaust fluid, and the answer is quite simple: it’s a fluid that gets injected into the exhaust system of your truck to help reduce pollution.
From the particulate filter, the exhaust gas travels past a nozzle which sprays diesel exhaust fluid into the stream of gases. DEF is made from deionized water and a very pure form of urea.
DEF, an acronym for Diesel Exhaust Fluid, is the trucking industry’s response to U.S. Environmental Protection Agency standards requiring all medium and heavy-duty diesel vehicles to significantly reduce engine emissions, particularly nitrous oxide as well as particulate matter.
Diesel exhaust fluid, or DEF, is a key component in lowering pollutants emitted from diesel engines, helping to improve efficiency and reduce emissions.
Diesel Exhaust Fluid or DEF for short, is a mixture of 32.5% Urea (for the ones that like chemistry: (NH2)2CO) and 67.5% de-ionised water. How does diesel exhaust fluid work? It is injected into the exhaust stream, where it’s water evaporates.
Diesel Exhaust Fluid (DEF) is a key element of a Selective Catalytic Reduction (SCR) exhaust aftertreatment. Answers to the most common DEF questions.
DEF is a chemical solution containing exactly 67.5% deionized water and 32.5% automotive-grade, aqueous urea. The urea component is an organic compound made of nitrogen, hydrogen, carbon, and oxygen.
Diesel Exhaust Fluid, often abbreviated as DEF, is a non-toxic, colorless, and odorless solution composed of purified water and urea. It is injected into the exhaust stream of diesel engines equipped with Selective Catalytic Reduction (SCR) systems.