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OWI Oel-Waerme-Institut gGmbH An-Institute of the RWTH Aachen
15.08.2019 | Research, Publications

Research Report Published: ENIAK 2

In recent years there have been significant changes in the composition and quality of fuels. In addition to those already present, new biofuels and alternative components are entering the market. At the same time, especially with efficient diesel engines, there is a trend towards long ranges and the associated long dwell times of the fuel in the tank. In addition, high return temperatures of modern common rail injection systems promote fuel ageing in the tank. It is known that aged fuels have an increased tendency to form deposits in the injectors. Modern, highly agile injection components with extremely small gap dimensions or flow cross-sections are becoming increasingly sensitive to internal deposits. 

In the DGMK project, the research units have investigated 784 deposit formation mechanisms and simulated the formation of deposits on a non-motor test bench. The observed deposit formation was specifically induced by in-situ degradation of the fuel on the test bench. By means of adapted and partly further developed evaluation routines, functional tests of injectors were carried out in order to assess the impairment of the injection process.

Extensive analytical and spectroscopic investigations of the components covered with deposits showed good reproducibility and allowed conclusions to be drawn about possible formation mechanisms and cause-effect correlations in the formation of internal deposits. 

OWI Oel-Waerme-Institut gGmbH

Research Agencies:

OWI Oel-Waerme-Institut gGmbH An-Institute of the RWTH Aachen
TU Bergakademie Freiberg, Institut für Energieverfahrenstechnik und Chemieingenieurwesen

The IGF project 18575 BG of the Research Association DGMK was funded via the AiF as part of the programme for the promotion of Industrial Collective Research (IGF) by the Federal Ministry for Economic Affairs and Energy on the basis of a resolution of the German Bundestag.