Diesel Exhaust Fluid
Diesel Exhaust Fluid (DEF) is an emissions control liquid required by modern diesel engines. It is injected into the exhaust stream. DEF is never added to diesel fuel. DEF is sprayed into the exhaust, breaking down NOx gases into nitrogen and water using an advanced catalyst system.
What is the Purpose of Diesel Exhaust Fluid?
In 2010, the EPA required diesel engines to reduce their production of (NOx) nitrogen oxides. That reduction is accomplished with the additive Diesel Exhaust Fluid (DEF).
This fluid reduces NOx and air pollution. So it helps heavy machinery and trucks operate within the federal emissions guidelines. From 2010, heavy-duty diesel trucks and equipment had a diesel tank and an additional diesel exhaust fluid tank.
