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Audi: More details in their Clean TDI diesel strategy

We found more details on Audi’s clean TDI diesel strategy which we would like to share with you.

Audi released details of the long-awaited release of its TDI clean diesel engines in the U.S. and Canada. Next winter, in January 2009, 50-state compliant versions of the 3.0-liter TDI V6 engine will make the first stateside appearance in the successful Audi Q7 crossover SUV.

Technological improvements employed by Audi to meet CARB’s low-emissions-vehicle (LEV) tailpipe standards — equivalent to federal tier 2, bin 5 — include cylinder pressure sensors, NOx sensors, revisions to the variable-geometry turbocharger and exhaust gas recirculation (EGR) system, a urea injection system called AdBlue and a second exhaust catalyst.

The AdBlue system sprays small amounts of a urea solution just upstream of the new DeNOx catalyst, where it reacts in the heated environment to reduce NOx emissions. AdBlue is stored in a 6.2-gallon tank — enough to last to the next scheduled oil change.

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Source: Inside Line