Clean diesel technology – Vorsprung durch Technik
Clean and diesel. The two words have never really been associated with each other. But thanks to our commitment to ‘Vorsprung durch Technick’ we have made it possible. The 3.0 TDI clean diesel engine available in the Audi Q7 features two new technologies – a DeNOx catalytic converter and AdBlue tank – which help to make it one of the cleanest-running diesel technologies available today.
How it works
The 3.0 TDI clean diesel engine uses a diesel oxidation catalytic converter along with a diesel particulate filter and a special DeNOx converter. A biologically degradable water-based solution, known as AdBlue, is injected in minute doses into the exhaust pipe upstream of the DeNOx converter. The hot exhaust gases break down the solution to form ammonia, which in turn splits the nitrous oxide into nitrogen and water. This result is a cut of nitrogen oxide emissions by up to 90 percent.
The solution is stored in a separate tank, which, when full, will easily last as long as the car’s service intervals. Audi Technicians then top up the tank during the car’s scheduled maintenance breaks.
Future proof
Due to this innovative technology, the Audi Q7 3.0 TDI clean diesel already complies with the EU 6 emissions standard that only comes into force in Europe in 2014, as well as the stringent BIN 5 standard in the USA.
