Investigation of mixture formation and combustion with pressure-modulated injection process shaping (DEFO) and analysis of the combined injection strategy with spatially separated pre- and main injection

Project name

Investigation of mixture formation and combustion with pressure-modulated injection process shaping (DEFO) and analysis of the combined injection strategy with spatially separated pre- and main injection

Project duration

01.01.2010 - 31.12.2013

Brief description

Due to its high process efficiency, the diesel engine with direct injection is established as a vehicle drive in passenger car and commercial vehicle applications. Due to the heterogeneous quality-controlled process control, diesel engines emit more particulates and nitrogen oxide emissions. In order to meet future exhaust emission standards, the simultaneous reduction of particulate and nitrogen oxide emissions is necessary. The reduction of these exhaust gas components within the engine is only possible to a limited extent using conventional methods due to the opposing behavior (particle-nitrogen oxide trade-off). It is therefore necessary to research and develop new processes to avoid the particle-nitrogen oxide trade-off of heterogeneous diesel combustion processes. In the research project, the new injection strategy of pressure-modulated injection process shaping is to be researched with regard to emission reduction. For a targeted application of the new injection method, it is necessary to better understand the internal engine processes of mixture formation, combustion and pollutant formation. This requires the analysis of mixture formation and combustion using optical methods. The knowledge gained will be used to optimize injection so that the heterogeneous diesel combustion process can be adapted for low particulate and nitrogen oxide emissions by means of injection pressure shaping. The combination with the REIN project already funded by the DFG offers great potential for complying with future exhaust emission limits within the engine. It may be possible to dispense with costly and material-intensive exhaust gas aftertreatment.

contact