| Volkswagen’s Touareg has one of the cleanest | | | | onclick="javascript:pageTracker._trackPageview(' |
| diesel engines in the world. Its BlueTDI engine with SCR | | | | outgoing/article_exit_link');" href=" axle">VW axle. By |
| catalytic converter reduces nitrogen dioxide (NOx) | | | | towing the 155 ton Boeing 747, Volkswagen Touareg |
| emissions by up to 90 percent. Touareg BlueTDI | | | | has displayed not only the prowess of its engine but |
| delivers 165kW/225 PS and meets even the strictest | | | | also the durability and power of every component. |
| “Tier2 Bin5” exhaust emissions standards | | | | The SCR (Selective Catalytic Reduction) Catalytic |
| implemented in the US states particularly in California, | | | | Converter |
| Massachusetts, New York, Vermont, and Maine. | | | | SCR is short for “Selective Catalytic Reduction”. |
| In the USA economical turbo-diesels like the V6 | | | | Its main function is to selectively convert the nitrogen |
| BlueTDI more than any present day powertrain | | | | oxide or NOx exhaust components to nitrogen and |
| technology can help in reducing oil consumption and the | | | | water without producing any undesirable byproducts. |
| generation of climate-impacting greenhouse gases. | | | | Volkswagen’s Touareg BlueTDI which will debut at |
| Volkswagen will offer the Touareg with the SCR | | | | the Geneva Motor show will also feature an oxidation |
| catalytic converter starting 2008 first in the US as part | | | | catalytic converter and a diesel particulate filter. |
| of its BlueTec alliance with DaimlerChrysler and Audi. | | | | Water-based urea solution like AdBlue is used in |
| The BlueTec alliance was started by the three | | | | converting the nitrogen oxides. The urea solution is |
| carmakers last year. | | | | stored in an auxiliary tank on the Touareg BlueTDI. It is |
| Volkswagen has also scheduled the launching of a | | | | in the auxiliary tank wherein the 32.5 percent urea is |
| smaller Jetta in America in 2008. It will also be equipped | | | | continuously sprayed into the exhaust stream before |
| with NOx storage catalytic converter that eliminates | | | | the SCR catalytic converter. It is measured based on |
| up to 90 percent of nitrogen oxides. Both the Touareg | | | | the mass flow of the exhaust. An engine management |
| BlueTDI and Jetta are scheduled to debut in Europe. | | | | system after obtaining information from a Nox sensor |
| The Euro 4 standard currently specifies a NOx limit of | | | | located after the SCR catalytic converter makes sure |
| 0.25 g/km while the US standard which Volkswagen | | | | that everything is correctly regulated. |
| Touareg BlueTDI satisfies specifies a NOx limit of | | | | The urea solution is atomized into fine spray by a |
| 0.043 g/km or 0.07 g/mile. Aside from the remarkable | | | | screen and transformed in the hot exhaust has |
| NOx catalytic converters that Touareg and Jetta | | | | stream upstream of the catalytic converter. It is in the |
| have, they are also equipped with heavy duty VW | | | | SCR catalytic converter where the nitrogen oxide is |
| axles. | | | | split into nitrogen and water. The water-based additive |
| It should be noted that the Touareg TDI had | | | | AdBlue is an odorless, non-toxic and biodegradable |
| successfully towed a Boeing 747 and was made | | | | solution. |
| possible by its especially modified a rel="nofollow" | | | | |