eSpray : Einspritzung, Mischung und Selbstzündung von E-Kraftstoffen für CI-Motoren

Abstract

Liquid hydrocarbons produced from renewable energy, so-called e-fuels, in combination with compres-sion ignition internal combustion engines, will make a significant contribution to the carbon-neutral mo-bility in the future. To achieve the optimum efficiency while minimizing the emissions, it is necessary to understand the physicochemical behaviour. This project deals with the injection, mixture formation and ignition of OME3-5 and 1-octanol compared with diesel-like dodecane. The international research network consists of five institutes that contribute to the project with different methods and resources. The very basic free-jet investigations are carried out by the Professorship for Fluid Systems Technology at Frie-drich-Alexander-Universität Erlangen-Nürnberg and the Combustion Research Facility at Sandia Na-tional Laboratories. The Institute for Combustion and Gas Dynamics at the University of Duisburg-Essen investigates mixture formation and combustion of the e-fuels in the optical compression ignition engine, thus making the transition from the fundamental free-jet investigations to real applications. The results of the individual institutes are summarized by the Institute of Powertrains and Automotive Technology at Vienna University of Technology in the form of CFD simulations. A reaction mechanism for OME3-5 developed by the Department of Mechanical Engineering at Shanghai Jiao Tong University is imple-mented so that the models represent both the free-jet experiments and the injection, mixture formation and combustion of e-fuels in the engine. The results obtained in this project are intended to provide physical insight and can be understood as design guidance for future CI engines to exploit the full po-tential of the studied e-fuels. With e-fuels, not only carbon neutral but also low emission powertrains can be realized. The objective of the research project was achieved.