Operation of a Diesel Engine with Biogenous Oxygenated Fuels (Poster Presentation)

Authors

Dipl.-Ing. A. Damyanov, Assoc. Prof. Dr. P. Hofmann, Vienna University of Technology; Dipl.-Ing. M. Derntl, Dr. M. Schüßler, AVL List GmbH, Graz; Dipl.-Ing. T. Pichler, Dr. N. Schwaiger, Graz University of Technology

Year

2017

Print Info

Fortschritt-Berichte VDI, Series 12, No 802

Summary

Second generation biofuels have the potential to contribute to the reduction of combustion engine CO₂ emissions without entering an ethical contradiction to food production. Of particular interest concerning a diesel engine are oxygen-containing fuels as they can defuse traditional target conflicts such as particle-NO_x trade-off or the efficiency-NO_x compromise. Within the research project “Regenerative oxygen-containing diesel substitute fuels as an opportunity for efficiency enhancement and emission reduction - OxyGen2” („Regenerative sauerstoffhaltige Diesel-Ersatzkraftstoffe als Chance für Effizienzsteigerung und Emissionsminimierung - OxyGen2“), the suitability for motor combustion of a series of preselected biofuels is being experimentally investigated. The most promising fuels include the groups of bio-alcohols, ethers and -furans such as, for example, ethanol, methanol, butanol, dimethyl ether and oxymethylene ethers. On a modified diesel engine at the Institute for Powertrains and Automotive Technology at the Vienna University of Technology, fuel-specific combustion processes are being developed and analysed regarding their feasibility, cost, efficiency and emissions. A distinctive feature of the project is the investigation of the fuel introduction into the internal combustion engine in three different ways. In addition to the generally used method of direct injection of diesel-biofuel blends, the biofuel is also fed via intake manifold injection in combination with parallel direct injection of diesel fuel into the combustion chamber. As a third particularly innovative approach, the reforming of the biofuel is being investigated experimentally. The resulting synthesis gas is fed to the engine by means of an injection system into the intake manifold. In this case the ignition is also effected via diesel pilot injection. The biofuel potential is evaluated using the three variants of fuel application and the results of the different biofuels are compared. An overall assessment summarizes the results of the production analysis, reforming investigations and motor operation, and provides an overview of the fuel potentials for the use in a diesel engine.