Reduction of Soot Emissions in Diesel Engines – Increased Air Utilisation by New Spray Hole Configurations
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Soot forms in internal combustion engines mainly due to a local lack of oxygen. With conventional Diesel combustion processes regions of unused air remain between the injection jets in the beginning of the combustion. With two new spray hole configurations, these regions can be utilised better. But during the burnout phase the air utilisation is worsened which finally leads to increased particulate matter emissions. The investigations were carried out at the Chair of Internal Combustion Engines of TU Berlin as part of a cooperation project with IAV.
The authors would like to thank all the employees of the Chair of ICE of TU Berlin and IAV Berlin for their support. The author's special thanks go to Lukas Moslener (IAV, formerly TUB), Alexander Salomon (TUB), and Axel Seiffert (IAV).