TDI (engine)

TDI lettering embossed on a Volkswagen engine cover
Volkswagen Marine 3.0-litre V6 TDI 265-6 engine
TDI emblem as used on TDI equipped vehicles

TDI (Turbocharged Direct Injection) is the Volkswagen Group's term for its current common rail direct injection turbodiesel engine range that have an intercooler in addition to the turbo compressor.[1][2]

TDI engines are used in motor vehicles sold by the Audi, Volkswagen, SEAT and Skoda marques, as well as boat engines sold by in Volkswagen Marine[3][4][5] and industrial engines sold by Volkswagen Industrial Motor.[6][7]

The first TDI engine, a straight-five engine, was produced for the 1989 Audi 100 TDI sedan. In 1999, common rail fuel injection was introduced in the V8 engine used by the Audi A8 3.3 TDI Quattro. From 2006 until 2014, Audi successfully competed in the LMP1 category of motor racing using TDI engine-powered racing cars.

TDI engines installed in 2009 to 2015 model year Volkswagen Group cars sold through 18 September 2015 had an emissions defeat device,[8][9] which activated emissions controls only during emissions testing. The emissions controls were suppressed otherwise, allowing the TDI engines to exceed legal limits on emissions.[10] Volkswagen has admitted to using the illegal device in its TDI diesel cars.[11]

  1. ^ "Technology – TDI – Super-efficient diesel engines for power with economy". Volkswagen.co.uk. Volkswagen UK. 2010. Retrieved 4 March 2010.
  2. ^ "Volkswagen AG – TDI Technical Glossary". Volkswagen.com. Volkswagen AG. Retrieved 5 November 2009.
  3. ^ "Volkswagen Marine > Engines <". www.vw-m.de. Volkswagen Group. 2009. Archived from the original on 19 July 2011. Retrieved 4 November 2009.
  4. ^ "Boat engines from Volkswagen Marine – Self-study programme M001 – Design and function" (PDF). www.vw-m.de. Volkswagen Marine. April 2001. Archived from the original (PDF) on 19 July 2011. Retrieved 18 February 2010.
  5. ^ "Boat engines from Volkswagen Marine – Self-study programme M002 – Design and Operation" (PDF). www.vw-m.de. Volkswagen Marine. August 2006. Archived from the original (PDF) on 19 July 2011. Retrieved 18 February 2010.
  6. ^ "The SDI 1.9 Industrial Engine" (PDF), www.mi-uk.com, Volkswagen AG, March 2005, archived from the original (PDF) on 14 July 2011, retrieved 4 November 2009
  7. ^ "TB 20 addendum – Technical Bulletin for Volkswagen Group timing belt renewal intervals" (PDF). Gates.com. Retrieved 4 November 2009.
  8. ^ Cite error: The named reference epa1 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference epa2 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference nyt1 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference nyt2 was invoked but never defined (see the help page).