Diesel Exhaust Fluid Emissions: Description

The Diesel Exhaust Fluid Emissions system uses a Selective Catalytic Reduction (SCR). This is a technology that uses a urea based Diesel Exhaust Fluid (DEF) and a catalytic converter to significantly reduce nitrous oxides (NOx) emissions.

• The system accomplishes this by injecting small quantities of DEF into the SCR where its vaporizes and decomposes to form ammonia and carbon dioxide.
• The DEF Dosing Control unit is used to control the operation and monitoring of the DEF system.
• The ammonia is the desired by-product which in conjunction to the SCR Catalyst, converts the NOx to a harmless nitrogen and water.
• The SCR system is equipped with two NOx Sensors and modules that are used to monitor the efficiency of the SCR Catalyst and DEF system.