From theautochannel.com
WASHINGTON, Jan. 23, 2007 — Volkswagen of America, Inc. today unveiled its cleanest diesel ever for the U.S., the Jetta TDI. Additionally, the company announced that this new clean diesel will be available to the U.S. market in the spring of 2008. This Jetta TDI will meet emissions standards applicable in all 50 states, including the most stringent “TIER 2/BIN 5″ or “LEV II/LEV” requirement limiting nitrogen oxide (NOx) emissions to 0.05 g/mile.
This clean diesel Jetta meets the lowest emissions standards without the use of urea injection. Instead, a nitrogen oxide storage catalyst reduces NOx emissions by up to 90 percent. The engine management system in the Jetta changes operating modes periodically to treat the NOx that has been stored in the catalytic converter. A particulate filter in the exhaust system further reduces emissions.