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

  • Li, Lin (Participant)
  • John Atkinson (Participant)
  • Carl Diver (Participant)

    Impact: Economic, Technological, Environmental


    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.
    Impact date20002013
    Category of impactEconomic, Technological, Environmental
    Impact levelAdoption