DEVELOPMENT OF ADVANCED TURBOCHARGING SYSTEMS

摘要

One of the key technologies for future diesel and gasoline engines will be concepts based on advanced boosting systems.Especially on the Si-Engine side, this development leads to new challenges. While in the past a turbocharged Si-Engine used to be a high performance version of an existing engine family, the trend towards "Downsizing" as a fuel efficient engine concept includes the turbocharging device completely as a key engine component.With regard to Dicscl engines, the trend towards higher specific power outputs leads to an increasing need for charging systems, which can provide sufficient boost pressure over a wide engine speed range at full load. More stringent emission regulations will lead to increased EGR-rates at higher speeds and loads than today, also requiring new charging concepts. Therefore, in today's powertrain research and development, the development of future turbocharged engines requires a strong cooperation between testing and CAE to achieve competitive products. The turbocharger itself will be in the focus of the engine developers, and its optimization will have to become more and more part of the engine development carried out by OEM and engineering partners. FEV therefore has developed a number of tools and methods for integrated development e.g. in the working areas of thcrmodynamic layout, turbochargcr design, prototyping and validation.