TY - JOUR A1 - Kaspar, Marcel A1 - Rabl, Hans-Peter A1 - Mayer, Wolfgang T1 - Ion-Molecule Reaction for the Selective Detection of Hydrocarbons in Diesel Exhaust Gas JF - Chemie Ingenieur Technik N2 - The hydrocarbons present in the diesel exhaust gas are analyzed. A mass spectrometer is used for the measurements, and it operates on the basis of an ion-molecule reaction. This method is especially suitable because it is selective, is as free of fragments as possible, and is highly sensitive to the species that need to be measured. The study shows that numerous hydrocarbons in diesel exhaust gas can be identified. In particular, three molecules, ethyne, ethene and propene, were analyzed online in-depth on an engine test bench under different engine operating conditions. KW - Diesel exhaust gas KW - Hydrocarbons KW - Ion-molecule reaction KW - Mass spectrometry Y1 - 2018 U6 - https://doi.org/10.1002/cite.201700075 VL - 90 IS - 6 SP - 826 EP - 834 PB - WILEY-VCH ER - TY - CHAP A1 - Kornexl, Michael A1 - Rabl, Hans-Peter A1 - Mayer, Wolfgang A1 - Haluska, Peter A1 - Ehrhard, Jan T1 - Motorische Untersuchung einer Doppelstromturbine bei gezielter Variation von Einflussparametern T2 - Ladungswechsel im Verbrennungsmotor 2017 : Elektrifizierung im Umfeld Ladungswechsel ; 10. MTZ-Fachtagung N2 - Um die Leistungsmerkmale moderner Ottomotoren, hohe Nennleistung bei niedrigem Kraftstoffverbrauch einerseits und hohes Low End Torque bei dynamischem Ansprechverhalten andererseits, zu erreichen, stehen Abgasturbolader mit verschiedenen Turbinentypen zur Verfügung. Dabei wird zwischen den Ausführungen ein- und mehrflutige Turbine unterschieden. Je nach geometrischer Ausführung der Flutentrennung wird bei den mehrflutigen Turbinen zwischen den Bauformen Zwillingsstrom- und Doppelstromturbine differenziert. KW - Abdichten KW - Drehzahlbereich KW - Druckverhältnis KW - dynamisches Verhalten KW - Einflussgröße KW - experimentelle Untersuchung KW - Ladungswechsel KW - Ladungswechselarbeit KW - Leckage KW - Randbedingung KW - Restgas KW - spezifischer Kraftstoffverbrauch KW - Stoßaufladung Y1 - 2018 SN - 978-3-658-22670-1 SN - 978-3-658-22671-8 U6 - https://doi.org/10.1007/978-3-658-22671-8_9 SP - 153 EP - 172 PB - Springer Vieweg CY - Wiesbaden ER - TY - CHAP A1 - Koder, Alexander A1 - Zacherl, Florian A1 - Rabl, Hans-Peter A1 - Mayer, Wolfgang A1 - Gruber, Georg A1 - Dotzer, Thomas T1 - Jatropha Oil as an Alternative Fuel for Modern Diesel Engines - Injection Characteristics and EGR-Compatibility T2 - WCX 17: SAE World Congress 2017 N2 - An effective way to reduce greenhouse gas emissions (GHGs) is to use rurally produced straight jatropha oil as a substitute for diesel fuel. However, the different physical and chemical properties of straight vegetable oils (SVOs) require a customized setup of the combustion engine, particularly of the injection timing and quantity. Therefore, this study demonstrates the differences in the injection and combustion processes of jatropha oil compared to diesel fuel, particularly in terms of its compatibility with exhaust gas recirculation (EGR). A 2.2 l common-rail diesel engine with a two-stage turbocharging concept was used for testing. To examine the differences in injection rate shaping of diesel fuel and jatropha oil, the injector was tested with an injection rate analyzer using both the fuels. To investigate the combustion process, the engine was mounted at an engine test bench and equipped with a cylinder pressure indication system. All limited emissions, as well as fuel consumption, were measured. Various injection strategies, boost and rail pressure levels were tested at different EGR rates in terms of their impact on the combustion process. EGR in particular offers a great potential in the case of jatropha oil combustion due to its oxygen content. In addition, the investigation of injection rate shaping in combination with cylinder pressure analysis allowed a detailed thermodynamic evaluation of the combustion process. Ignition delay (ID) was also analyzed using a new method to calculate the start of combustion (SOC) Y1 - 2017 U6 - https://doi.org/10.4271/2017-01-5000 PB - SAE International ER - TY - JOUR A1 - Koder, Alexander A1 - Schwanzer, Peter A1 - Zacherl, Florian A1 - Rabl, Hans-Peter A1 - Mayer, Wolfgang A1 - Gruber, Georg A1 - Dotzer, Thomas T1 - Combustion and emission characteristics of a 2.2L common-rail diesel engine fueled with jatropha oil, soybean oil, and diesel fuel at various EGR-rates JF - Fuel N2 - To investigate the combustion and emission behavior of straight vegetable oils (SVO), jatropha oil, soybean oil, and diesel fuel were tested. For this research, a 2.2L common-rail engine with a two-stage turbocharging concept was equipped with a cylinder pressure indication system, an exhaust-gas analyzer, an AVL Micro Soot sensor and a Scanning Mobility Particle Sizer 3936 (SMPS) device to detect the particle-size-distribution (PSD). At a low and mid-load engine-operating point (EOP), the thermodynamic and emissions were investigated under various exhaust gas recirculation (EGR) rates with respect to the PSD. Moreover, the injection behavior of the three test fuels was analyzed separately using an injection rate analyzer. This procedure facilitates the thermodynamic investigations of the engine process and allows the calculation of the hydraulic delay (HD) as well as the ignition delay (ID). The ID of the SVO fuels compared to diesel fuel was found to be lower at all engine-operating modes, while jatropha oil always showed the shortest ID. In the particulate-nitrogen oxide (NOX) trade-off, the SVO fuels showed higher particulate matter (PM) emissions at the low-load EOP, whereas the PM emissions of diesel fuel overtop the SVO fuels at a higher engine load. With increased EGR-rates, a rise in the particle size was observed for all fuels. At the low-load EOP, the SVO fuels showed larger particles for high EGR-rates. This effect also changed by increasing the engine-load to the mid-load EOP, wherein the particle size of the diesel fuel emissions is higher by applying elevated EGR-rates. KW - BEHAVIOR KW - BLENDS KW - Exhaust gas recirculation KW - IGNITION KW - INJECTION KW - Jatropha oil KW - KARANJA KW - Particle-size-distribution KW - PERFORMANCE KW - RME KW - Soybean oil KW - Straight vegetable oil combustion KW - VEGETABLE-OILS Y1 - 2018 U6 - https://doi.org/10.1016/j.fuel.2018.04.147 VL - 228 IS - September SP - 23 EP - 29 PB - Elsevier ER - TY - JOUR A1 - Appelhans, Marie-Luise A1 - Kampmann, Matthias A1 - Mottok, Jürgen A1 - Riederer, Michael A1 - Nagl, Klaus A1 - Steffens, Oliver A1 - Dünnweber, Jan A1 - Wildgruber, Markus A1 - Roth, Julius A1 - Stadler, Timo A1 - Palm, Christoph A1 - Weiß, Martin Georg A1 - Rochholz, Sandra A1 - Bierl, Rudolf A1 - Gschossmann, Andreas A1 - Haug, Sonja A1 - Schmidbauer, Simon A1 - Koch, Anna A1 - Westner, Markus A1 - Bary, Benedikt von A1 - Ellermeier, Andreas A1 - Vögele, Daniel A1 - Maiwald, Frederik A1 - Hierl, Stefan A1 - Schlamp, Matthias A1 - Ehrlich, Ingo A1 - Siegl, Marco A1 - Hüntelmann, Sven A1 - Wildfeuer, Matthias A1 - Brückl, Oliver A1 - Sterner, Michael A1 - Hofrichter, Andreas A1 - Eckert, Fabian A1 - Bauer, Franz A1 - Dawoud, Belal A1 - Rabl, Hans-Peter A1 - Gamisch, Bernd A1 - Schmidt, Ottfried A1 - Heberl, Michael A1 - Thema, Martin A1 - Mayer, Ulrike A1 - Eller, Johannes A1 - Sippenauer, Thomas A1 - Adelt, Christian A1 - Haslbeck, Matthias A1 - Vogl, Bettina A1 - Mauerer, Wolfgang A1 - Ramsauer, Ralf A1 - Lohmann, Daniel A1 - Sax, Irmengard A1 - Gabor, Thomas A1 - Feld, Sebastian A1 - Linnhoff-Popien, Claudia A1 - Ławrowski, Robert Damian A1 - Langer, Christoph A1 - Schreiner, Rupert A1 - Sellmair, Josef ED - Baier, Wolfgang T1 - Forschung 2019 BT - Thema: Künstliche Intelligenz N2 - Bericht mit Forschungsprojekten aus verschiedenen Bereichen der OTH Regensburg mit dem Schwerpunktthema "Künstliche Intelligenz" und einem Gespräch zur "Medizin der Zukunft" T3 - Forschungsberichte der OTH Regensburg - 2019 KW - Forschung KW - Forschungsbericht KW - Künstliche Intelligenz Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-7890 SN - 978-3-9818209-7-3 CY - Regensburg ER -