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SCR Technology

Selective Catalytic Reduction (SCR) is the only diesel engine technology that is as good for passenger vehicle performance and business as it is for the environment. It is recognized to be one of the most cost-effective and fuel-efficient vehicle emissions control technologies available.

The three main components of the SCR system are:


The vaporized Diesel Exhaust Fluid is injected into the exhaust stream of a diesel engine. When the hot exhaust combines with the Diesel Exhaust Fluid within the SCR catalyst, it is broken down into two natural components of the air we breathe:


These components are then expelled through the vehicle tailpipe. Using SCR as a diesel emissions control technology results in:


Some companies say that SCR will take up needed space "back of cab" - leading SCR advocates disagree. In fact, Detroit Diesel developed an evolutionary 1-Box BlueTec SCR system that integrates emissions control technology into one optimized and compact unit. For more information, click here.

SCR has become the technology of choice for many manufacturers in European countries as well as around the world, and will inevitably become a preferred choice for the U.S. commercial vehicle industry as well as passenger and light truck vehicle owners who want the power, performance and fuel efficiency of diesel.