Innovative Diesel Concepts - A Sustainable Path to CO₂ Reduction

Authors

Dr.-Ing. J. Schommers, Dr.-Ing. A. Lingens, Dr.-Ing. H. Breitbach, Dipl.-Ing. T. Betz, Daimler AG, Stuttgart

Year

2008

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 672

Summary

In recent years, enormous improvements in thermodynamically relevant diesel engine components (turbocharging, fuel injection and exhaust gas recirculation) and designs have led to significant improvements in fuel economy, performance and exhaust emissions.

Despite the vast torque potential, however, further improvements in diesel engine fuel economy via load-point shifting, were not possible due to emissions requirements and the driveability demands of customers. These limits can now be significantly expanded through targeted thermodynamic designs and new, innovative technological components.

The new four-cylinder concept presented here enables considerably reduced fuel consumption, by means of operating-point shifting while retaining drivability and performance as standard for the vehicle class. We discuss the premises and the method for downspeeding and downsizing approaches, describe the challenging thermodynamic requirements, and explain the details of our innovative concept. Chief among these are fuel injection and turbocharging techniques.

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