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Tuesday, August 29, 2006

BLUETEC diesel fails to meet emission requirements in 5 states
This is a sad day for the diesel fans in five US states. GreenCarCongress is reporting that the BlueTec diesel from Mercedes did not pass the required emission standards in California, Maine, Massachussets, New York and Vermont.
Tests by the EPA in 2004 of a E320 prototype indicated that the aftertreatment system came in at just beneath 0.06 g/mi of NOx; the Tier 2 Bin 5 target is 0.05 NOx g/mi. (See graph below)

The EPA has yet to sign off on urea-SCR systems for light-duty vehicles, partly due to concerns on enforcement. It is clear, however, that urea-SCR is going to be necessary to support a full 50-state rollout of most clean diesel vehicles. The EPA said at the recent DEER 2006 conference that it would soon provide guidance to manufacturers on urea-SCR systems for light-duty vehicles.


posted by Muamer Hodzic @ 8/29/2006 04:40:00 PM    
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