Fuel Pressure Increase up to 50 MPa for Gasoline Direct-injection Engines
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For all engine manufacturers worldwide, the reduction of exhaust gas emissions is one of the driving forces of development. Increasing the fuel pressure opens the possibility of significantly reducing emissions. In this article, Opel shows that a significant potential for particulate-number reduction is achievable in almost the entire operation map by rising the pressure up to 50 MPa.
Effects of Fuel Pressure Increase
In addition to gaseous emissions, Particulate Number (PN) emissions have become a central topic of interest in the field of gasoline Direct-injection (DI) engines. Observing the development of these engines throughout the last years shows a continuous increase in fuel injection pressure that led to current fuel pressures of 20 to 35 MPa in the market . The evolution to higher pressures offers potential benefit for emissions while pushing fuel system's components and their integration into the engine and vehicle to technological limits that challenges powertrain...
Special thanks to our colleagues Benedikt Ley, Peter Schaffner, Elke Redante, Roland Nolte, Stefan Schuster, Claus-Jürgen Dittrich, Ulf Steinert, Valerio Polidori, Mauro Grandi, Eberhard Kull, Jan Fritzsche, Martin Krämer, and Dragan Stojkovic for their contributions to the development and implementation of this study.