SCR Lets You Run Smart
The Smart Answer to EPA 2010

March 2010 

EPA 2010 regulations mandate a 90 percent cut in NOx emissions from 1994 levels. Selective Catalytic Reduction (SCR) from Detroit Diesel and Cummins is Freightliner’s choice to meet these regulations.

SCR — Selective Catalytic Reduction
• Is Freightliner’s choice to meet EPA 2010 regulations.
• Is more efficient than in-cylinder EGR
• Only requires you to fill a small DEF tank every 5,000–7,000 miles.
• Lets you Run Smart

What is SCR Technology?
SCR emissions technology is designed to bring heavy-duty diesel emissions to post-EPA 2010 standards.

EGR — Exhaust Gas Recirculation Engine
1. Your Freightliner truck will be equipped with a Detroit Diesel (or Cummins) Exhaust Gas Recirculation (EGR) engine.
2. After the exhaust leaves the engine, it runs through a diesel oxidation catalyst and a diesel particulate filter to remove soot and particulate matter.

DEF — Diesel Exhaust Fluid
3. Then the exhaust is combined with Diesel Exhaust Fluid (DEF), sent through a final catalyst to remove NOx and finally water and nitrogen are released into the air.
By running the engine hotter, the engine builds up more NOx and generates less particulate matter. This allows the engine to perform more fuel efficiently, but also requires the use of SCR to reduce the additional NOx. The end result is an engine that provides great performance, great fuel economy and meets the EPA 2010 regulations.

Why SCR?
Freightliner selected SCR technology because it allows drivers to run smart. It actually improves an engine’s fuel efficiency by up to 5 percent and is simple to operate.

Run Smart Answers
Contact your local Lonestar Truck Group dealer and one of our
helpful sales staff can answer all of your EPA 2010 questions.

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