Conceptual Layout and Thermodynamic Potential of a Variable Compression Ratio for Modern Diesel Engines

Authors

Dipl.-Ing. T. Körfer, Dr.-Ing. W. Bick,
Dr.-Ing. T. Schnorbus, Dr.-Ing. B. Holderbaum,
Dr.-Ing. M. Pieper, FEV GmbH, Aachen; M.Sc. M. Miccio, FEV Italia, Rivoli;
M.Sc. B. Graziano, Dipl.-Wirt.-Ing. B. Heuser, RWTH Aachen University

Year

2014

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 777

Summary

The strict global regulations to reduce transport-related CO₂-emissions while improving local air quality require the use of new technology approaches. In addition to the increasing introduction of electric traction aid a continuous and consistent further development of conventional engines of economic aspects is important and promising. Since manufacturers have to meet the CO₂ fleet targets while simultaneously fulfilling also the upcoming, more stringent emission legislations, there is still the need for further improvement despite the current advantageous CO₂ balance of modern diesel engines. From a thermodynamic point of view, an increase in combustion efficiency requires a high compression ratio. For the sake of thermo-mechanical component stress, but also for emission reasons, a tendency towards reduction of the geometric compression ratio (CR) can be observed for some time.

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