Meeting 2010 Emissions The Most Fuel Efficient and Reliable Way
More than three years ago, Detroit Diesel Corporation announced that the Heavy Duty Engine Platform, including the recently introduced DD15, will utilize Selective Catalytic Reduction (SCR) technology to meet the upcoming EPA emissions standards for commercial vehicles. The engine platform was specifically designed to utilize this proven technology to accomplish the goal of lowering NOx (oxides of nitrogen, such as NO and NO2) emissions, and also provide the benefit of improved fuel economy. SCR treats the exhaust downstream of the engine with a simple, inexpensive, safe spray of Diesel Exhaust Fluid (DEF), a 32.5% urea solution that is currently being used in North American commercial markets for power plant emission reductions. Using DEF optimizes our diesel engine's performance under the hood to reach fuel efficiency levels that otherwise would have been infeasible, due to the increasing EGR rates needed to meet progressively restrictive NOx reduction regulations.
How Doese SCR Work?
Detroit Diesel's SCR works by harnessing the power of chemical reactions to reduce NOx to nitrogen (N2) and water - both present in the air we breathe every moment. After exhaust gases leave the Diesel Particulate Filter (DPF), they are treated with precisely - controlled quantities of DEF, causing a chemical reaction that produces ammonia gas, which mixes with the exhaust gases. The ammonia gas and NOx then react in a catalyst to form nitrogen and water.
As a result, the exhaust gases leaving the tailpipe on each and every Detroit Diesel engine using SCR has NOx levels below the EPA standards of 0.2 g/bhp-hr.
ATD - Aftertreatment Device CAC- Charge Air Cooler DEF - Diesel Exhaust Fluid
DPF - Diesel Particulate Filter EGR - Exhaust Gas Recirculation HC - Hydro Carbon
DOC - Diesel Oxidation Catralyst SCR - Selective Catalyst Reduction | ||||||
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Evolution of
Emission Technologies
How Does SCR Help
Improve Fuel Economy?
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How Does SCR
Improve Reliability
and Life Cycle Cost?
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The New DD15
Designed with SCR In Mine
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A Brief Summary of Why
Detroit Diesel is
Confident in SCR
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