BLUETEC Diesel technology<br />Recirculates a portion of an engine's exhaust gas back to the engine cylinders.<br /><ul><li> EGR reduces the amount of Nox</li></ul>But...<br /><ul><li> Reduces the specific heat ratio of the combustion gases and hence the power
HC DeNOx as a non-selective NOx reduction method using HC components in suitable catalytic converters.
HC DeNOx processes have only a very narrow NOx reduction temperature window and are therefore mainly effective in urban cycles.</li></li></ul><li>BLUETEC Diesel technology<br />DOC – Direct Oxidation Catalyst<br />DPF – Diesel Particulate Filter<br />NSC – NOx Storage catalyst<br />SCR – Selective Catalytic reaction<br />
BLUETEC Diesel technology<br /><ul><li> Break down pollutants from diesel engines in the exhaust stream through a chemical process.
Monolith honeycomb substrate coated with platinum group metal catalyst, packaged in a stainless steel container
Porous honeycomb structure that catches the soot as it passes through.
A catalyst implemented with an SCR coating for furtherimprovement of the NOx reduction and to deal with the sulfur emission which is stored and released from the NSC due to fuel sulfur to ensure the long-term stability.</li></li></ul><li>BLUETEC Diesel technology<br />Intermittent rich fuel mixture is injected which is controlled by the ECU depending on the NOx content in the NSC converter<br />
BLUETEC Diesel technology<br />Requires low sulfur diesel (ULSD) Less then 15 ppm.<br />The SCR-technology costs are negatively influenced by the AdBlue tank and dosing system.<br />The SCR-technology requires replenishment of AdBlue at regular intervals.<br />The low freezing point of urea needs adequate measures for winter functioning.<br />NOx storage exhaust-gas aftertreatment processes, will also lead to increased HC emissions.<br />
BLUETEC Diesel technology<br />BLUETEC has the cleanest diesel emissions.<br />BLUETEC enabled Mercedes Benz E 320 to meet EURO VI norms already.<br />Customers would benefit from better fuel mileage.<br />It is predicted that the diesel sales will quadruple in the next decade and hence an ultimate solution for NOx emissions<br />20 to 40% better mileage then gasoline<br />
BLUETEC Diesel technology<br />SAE Technical paper - BLUETEC Diesel Technology<br />C. Enderle, G. Vent and M. Paule<br />Daimler AG<br />http://www.mercedes-benz.com/content/mbcom/international/international_website/en/com/Mercedes-Benz_Brand_Galery_BLUETEC.html<br />http://rb-kwin.bosch.com/us/en/powerconsumptionemissions/exhaust-gastreatment/dieselengines/exhaust-gas_management/storagecatalyticconverter.html<br />http://en.wikipedia.org/wiki/BlueTec<br />http://en.wikipedia.org/wiki/EGR#EGR_in_diesel_engines<br />http://www.worldcarfans.com/10601108065/mercedes-benz-bluetec-technology<br />http://alternativefuels.about.com/od/researchdevelopment/a/bluetec.htm<br />