The new, fifty-state legal Jetta BlueTDI is finally done and it's coming soon. At the International Vienna Motor Symposium in Austria, Volkswagen announced that it's completed development on what they are calling the BlueTDI system for their US diesels. Like Mercedes (BlueTec) and BMW (BluePerformance), VW is adopting the Blue moniker for their cleanest, most efficient systems. The Jetta BlueTDI will be the first Tier2 Bin5 compliant diesels that doesn't have to use a urea injection system to meet the new NOx emissions standard. VW started with the updated 2.0L TDI that was launched in the European Tiguan last fall. Individual cylinder pressure sensors were added that allow the engine management system to optimize the fuel injection pulses to keep combustion temperatures down. That helped VW eliminate 60-percent of the NOx emissions before you even get to the exhaust stream. The exhaust gas flowing from the 2.0L engine are low enough that VW was able to use a lean NOx trap to convert the remaining NOx to nitrogen and water. However, the larger 3.0L V-6 TDI that is coming in the Touareg and Audi Q7 at the end of the year will have to use urea injection. In addition to the NOx trap, there is a particulate filter to eliminate the soot often associated with diesel engines. The new Jetta will be able to get up to 60mpg when cruising on the highway, a boost of 12-percent over the last US-market Jetta TDI from 2006. The Jetta BlueTDI should be the first of the new round of diesels to come to market when it arrives later this summer. The first batch of cars should actually start arriving at US dealers in June, where they will be available for test drives through the summer before going on sale in September.



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