Reverse Tapered Hole Drilling for Automotive Fuel Injection Nozzle Manufacture- REF2014

Impact: Economic impacts, Technological impacts, Environmental impacts


The University of Manchester and Delphi Diesel Systems jointly developed a reverse tapered micro-hole drilling technique, which has resulted in wide commercial applications for the manufacture of fuel injection nozzles in diesel engines and is used by Volkswagen, Ford and Renault in passenger cars and trucks. The technique has resulted in 1.5% fuel saving, 35-40% reduction in particulate matter emission, 20% reduction in NOx emission, 3% reduction in CO2 emission, and allows diesel engines to satisfy the new EU emission legislation Euro 5 in 2008/2009. Delphi’s diesel engine component business increased by €0.8 billion/year as a result of the new fuel injection technology.

Category of impact

  • Economic impacts
  • Technological impacts
  • Environmental impacts
2000 - 2013

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