10th Symposium "The Working Process of the Internal Combustion Engine"
Potential of Free Injection Rate Shaping for In-Cylinder Pollutants Reduction in a DI-Diesel Engine
Authors
J. Seebode, IAV GmbH, Berlin, T. Delebinski, G.P. Merker, Institut für Technische Verbrennung, Universität Hannover, M. Willmann, C. Teetz, MTU-Friedrichshafen
Year
2005
Summary
In direct injection diesel engines the fuel atomisation process strongly affects combustion and exhaust emissions. The workout describes a flexible research injection system, which is designed to provide a multitude of degrees of freedom in shaping the injection rate. Because of the directly piezo actuated nozzle needle the system features the possibility of a defined needle lift to restrict the flow rate. Additionally an upstream pressure modulation is in use. Within the period of injection the pipe pressure can be varied to adjust the same injection rate as the needle controlled shape. The main target of the evaluations is aimed at the impact of the injection rate shape to show the potential concerning a simultaneous reduction of NOx and soot emissions by keeping the fuel consumption requirements.
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