PN-Reduktion

The aim of PN-Reduktion is the development of improved efficiency environmentally-compliant engines by combining low-CO2/NO/NO2 emmission motors with optimized fuel-injection technology to reduce particle emission by about 50% compared to current values. A multidisciplinary approach is required to understand the interplay between the large number of parameters involved. A specific aspect of the injection process is the transition between the internal flow characteristics at the injection nozzle exit and the subsequent spray formation.

Using high-speed X-ray radiography and shadowgraphy it is foreseen to characterize the physical development of fuel spray during its development and to correlate these data to flow-simulation models. For this a purpose-built mobile spray-injector chamber with an integrated high-speed camera setup will be realised.

Correlating high-speed X-ray image data and model simulations under varying experimental conditions will permit optimisation of critical process parameters as a contribution towards improved design of the injection-nozzle system.

Project partners

• Continental Automotive GmbH
• Lehrstuhl für Technische Thermodynamik (LTT), FAU Erlangen
• Laboratory for Applications of Synchrotron Radiation (LAS), KIT

PN-Reduktion is funded by the Federal Ministry for Economic Affairs and Energy (BMWi) under the contract number 19I17011C

Publications

The influence of superheated injection on liquid and gaseous flow field of an experimental single-hole gasoline direct injection injector. Bornschlegel, S.; Conrad, C.; Durst, A.; Welss, R.; Wensing, M.; Olbinado, M.; Helfen, L.; Baumbach, T. 2021. International journal of engine research, 22 (2), 592–605. doi:10.1177/1468087419858464