The Next Evolutionary Step
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SUPERCHARGING
The Next Evolutionary Step than Boosting – 18 More The Turbocharger with
“A general ban would 28 make all diesels illegal”
Exchange as Energy 32 Gas Resource – Investigations
Electric Machine
Interview with Thomas Koch [KIT],
Ronny Werner, Tilo Roß,
Christian Beidl [TU Darmstadt]
with a Turbogenerator in the Intake Section
Matthias Stiegler,
and Hermann Rottengruber [OVGU]
Pascal Mühlebach [sa-charging
Frank Atzler [TU Dresden]
solutions], Daniel Sigg [Sonceboz], Thomas Weyhing [KIT], Werner Thoma [Mercedes-Benz]
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The electrification of powertrains is bringing about fundamental changes in turbochargers relating both to their performance and efficiency and to their function and role in the overall system. A few years ago exhaust turbochargers were transformed from sources of power at the expense of efficiency into a means of making engines more efficient. Electrification is taking this change of role a step further, for example by adding a compressor. And the next evolutionary step is already imminent. In the future the supercharging system will become an energy supplier. Essentially, the foundation for such a use has already been laid. For example, Mercedes-AMG recently introduced an electric exhaust turbocharger that has an electric motor on the turbine shaft between the turbine wheel and the compressor wheel. This will be used in its next generation of cars. The configuration is ready to make the leap into mass production and a modified version of this approach can be used with an electric motor to recover energy. The Technical University of Dresden is investigating the necessary conditions, the possible options and the technical requirements for achieving precisely this by actively braking the rotating assembly. The article highlights the potential offered by influencing the energy flows in the turbocharger. The second cover feature describes a different path to the same goal. sa-charging solutions, Sonceboz, the Institute for Piston Engines (IFKM) at the Karlsruhe Institute of Technology and Mercedes-Benz introduce the concept of a turbo- alternator in the air intake that makes it possible to recover energy from pressure losses, excess exhaust gas and waste heat. © Maksym Yemelyanov | stock.adobe.com
In the interview Prof. Thomas Koch from the Karlsruhe Institute of Technology, Prof. Christian Beidl from TU of Darmstadt and Prof. Hermann Rottengruber from the Otto von Guericke University Magdeburg explain in the light of recent events what impact the forthcoming ruling by the Court of Justice of the European Union on defeat devices for exhaust gas aftertreatment systems in diesel vehicles could have and why these devices are needed in certain circumstances. Thomas Schneider
MTZ worldwide 10|2020
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