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Blutech is just a name created by Daimler AG and attached to vehicles using clean diesel technology. I'm assuming Dodge stopped using the name when that partnership ended. Another guess would be that it only applied to 2007 6.7s, maybe early 2008s, but I don't know for sure. The only thing I do know is that it is Mercedes branding.
It's not "Just a badge" BlueTec is a Daimler/Chrysler patentd technology that uses Urea injection to convert NOx emissions to ammonia which is then catalyzed with a downstream catalyst. It is much preferred than diluting the intake charge with recirculated exhaust gasses to lower compustion temperatures to manage NOx, which is what everyone else is doing now. Particulate filters have nothing to do with NOx emissions, they catch and reduce soot. More details here: http://www.daimlerchrysler.com/dccom...-0-0-0,00.html
BLUETEC is a combination of technologies for passenger cars and light trucks to reduce all relevant emission components. The system for passenger cars includes an oxidizing catalytic converter and a diesel particulate filter, as well as innovative systems for reducing nitrogen oxide emissions. Whether a combination of Denox and a BLUETEC catalytic converter, or AdBlue injection with a BLUETEC catalytic converter is used will depend on the individual design concept of the vehicle. Regardless of which technical solution is used, BLUETEC makes diesel vehicles in every class the cleanest diesels in the world. BLUETEC diesel technology for Mercedes-Benz commercial vehicles combines highly efficient engines with an exhaust gas treatment system based on selective catalytic reduction (SCR) technology. With SCR technology, nitrogen oxides are converted into harmless nitrogen and water vapor by adding ammonia as a reducing agent in a catalytic converter.
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