In this study, a fully optically accessible single-cylinder research engine is the basis for the visualization and generation of extensive knowledge about the in-cylinder processes of mixture formation, ignition and combustion of oxygenated synthetic fuels. Previous measurements in an all-metal engine showed promising results by using a mixture of dimethyl carbonate and methyl formate as a fuel substitute in a DISI-engine. Lower THC and NOx emissions were observed along with a low PN-value, implying low-soot combustion. The flame luminosity transmitted via an optical piston was split in the optical path to simultaneously record the natural flame luminosity with an RGB high-speed camera. The second channel consisted of OH*-chemiluminescence recording, isolated by a bandpass filter via an intensified monochrome high-speed camera. To investigate the combustion process spectrally, spatially and temporally resolved in more detail, selected operating points were recorded again via a high-speed imaging spectrograph.Regular gasoline fuel acts as a reference and is compared to the oxygenated mixture. Since all oxygenated fuels show a heating value lower than gasoline, the injected mass increases for constant engine load. For 65 vol-% DMC 35 vol-% MeFo, the gasoline equivalent, a product of the lower heating value and the density, results in a factor of two. Accordingly, elevated cooling effects of the mixture are expected. Because of these unfavorable conditions for mixture formation, spots of diffusion flames could be detected when using oxygenated fuels.A lambda sweep showed that the mixture did not produce significant soot even in slightly lower than stoichiometric conditions. In addition, a very late SOI of around 90 CAD bFTDC showed reduced burning duration and lower diffusion flame intensity.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Optical Investigations of an Oxygenated Alternative Fuel in a Single Cylinder DISI Light Vehicle Gasoline Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    SAE WCX Digital Summit ; 2021



    Erscheinungsdatum :

    2021-04-06




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Optical Investigations of an Oxygenated Alternative Fuel in a Single Cylinder DISI Light Vehicle Gasoline Engine

    Mühlthaler, Markus / Blochum, Sebastian / Stadler, Andreas et al. | British Library Conference Proceedings | 2021


    Potential Analysis of a DMC/MeFo Mixture in a DISI Single and Multi-Cylinder Light Vehicle Gasoline Engine

    Gadomski, Bartosch / Kraus, Christoph / Thamm, Fabian et al. | SAE Technical Papers | 2021


    Gasoline Fuel Injection Investigations On Single Cylinder SI Engine

    Latey, A. A. / Das, L. M. / Babu, M. K. Gajendra et al. | SAE Technical Papers | 2005


    Comparison of Promising Sustainable C1-Fuels Methanol, Dimethyl Carbonate, and Methyl Formate in a DISI Single Cylinder Light Vehicle Gasoline Engine

    Blochum, Sebastian / Fellner, Felix / Mühlthaler, Markus et al. | British Library Conference Proceedings | 2021


    Vehicle application of a 4-cylinder tumble DISI engine

    Baumgarten,H. / Bozelie,P. / Geiger,J. et al. | Kraftfahrwesen | 2001