Entwicklungsstand der mittelschnellaufenden Dieselmotoren unter besonderer Berücksichtigung der Emissionen

Summary

Over the more than 100 years since the invention of the Diesel engine, the medium-speed Diesel engine is considered to be trendsetting for the introduction of new technologies in order to comply with the constantly increasing customer demands. The first decades of the Diesel engine were, to a great extent, determined by aiming at a higher power density. By continuously increasing the mean effective pressure, the ignition pressure and the piston speed, high-pressure turbocharging and, e.g., the multi-valve technology were introduced for the Diesel engine with direct injection. In order to also deal with the aspect of increasing the reliability in heavy fuel oil operation, which is most important in the application range of large-bore engines, new concepts such as continuous tierods, fire land ring and chromium-ceramic piston rings were introduced in the design of the engine frame and the components. After focusing on the fuel consumption, development of the Diesel technology during the last decades concentrated, in context with the legislation, on the emissions. In addition to the exhaust gas emissions (CO₂, NO_x, soot or particles), also the noise and vibration emissions of the concept design have to be taken into consideration. As the manufacturers of large-bore engines are today more and more expected to offer complete systems, also plant-specific requirements have to be considered for the concept of, e.g, the pipeless engine.