Audi has unveiled its first
Tier II Bin 5 compliant diesel engine, entering series
production in 2008 for European and US markets. Initially the
clean-diesel technology will be limited to Audi's three-litre V6
TDI engine for use in the Audi A4 and Audi Q7. By 2010 Audi aims to
extend the use of clean-diesel technology to other vehicle
classes.
As part of the BlueTec
consortium Audi will use advanced combustion technology coupled
with downstream exhaust aftertreatment and an AdBlue dosing system.
Turbocharging, common-rail injection and EGR will bring about a
reduction in raw emissions. An extensive aftertreatment package
including a two-way catalyst, DPF and a urea-SCR system will reduce
levels of NOx and PM below the world's most stringent emissions
limits. It would appear that Audi has developed this system with
one eye on the impending European 130g/km CO2 limit, planning to
increase fuel efficiency across its range with advanced diesel
technology.























