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Viewing 1 to 30 of 2080
Event
2014-12-10
This session will provide insight into the major design characteristics and performance of electric drivetrains for passenger vehicles.
Event
2014-12-10
Optimizing the performance of the electric drivetrain requires the latest motor control algorithms and system modeling
Event
2014-11-25
Event
2014-11-19
- Push and pull factors influencing xEV penetration in Europe and other major regions - OEM specific CO2 emission targets in Europe - Forecast of approaches of major OEMs in Europe (technology penetration rates in Europe= - Market outlook xEV volumes by region and global component markets (2020 / 2025)
Event
2014-11-19
Event
2014-11-19
Looking at the future passenger car market and the competition of vehicle technologies and fuels to reach European corporate fleet CO2-targets, total costs of ownership (TCO) are certainly an important indicator for customer acceptance, especially in the case of BEVs and PHEVs. With Vector21 (Vehicles Technologies Scenario Model), DLR started in 2007 with agent-based vehicle choice modeling. We will compare TCO with a more recent, utility based approach and we will give insight to scenario results for the German market.
Event
2014-11-19
The presentation will give an overview about the current activities of the HELLA-VAHLE cooperation in the field of wireless power transfer. Our system comes with the charging control unit integrated within the primary side and also special focus will be on the interference with keyless entry systems of surrounding cars.
Event
2014-11-19
In every electrification program, traction motor efficiency is paramount. Efficiency of electrical energy use is usually what is most discussed; however, there is another form of efficiency that is quite important: power density. This efficiency is carried out by maximizing performance and minimizing volume and weight. There are many aspects that impact power density. This presentation will investigate what the main drivers of power density. Designers will learn how voltage and/or current, cooling, winding selection and rotor speed can all impact electric motor performance. If the vehicle designer understands how these relate to one another and the impact they have on electric motor/generator performance, one can optimize and select the rest of the components in the powertrain to maximize power densities to reduce costs.
Event
2014-11-19
Current and angle sensors considerably influence the performance of electric drives. The sensors need to be safe and have limitations like limited bandwidth and signal processing delay times. Depending on the operating point, however, these effects may be more or less severe and have different effects, like torque ripple or lower efficiency. The presentation shows requirements, the impact and compensation methods for sensors parameters.
Event
2014-11-19
With the rising cost of semiconductors and limited space for power inverters in electric and hybrid vehicle applications, the demand for efficient power electronics is increasing. Greater efficiency has a direct impact on the required size of both the surface area of the semiconductors and the cooling system. Power electronics efficiency also has a great impact on other powertrain components like the battery capacity further increasing the need for higher efficiency. This presentation discusses the different solutions used today that allows improved IGBT switching losses and expresses the limitations of these solutions. The new Reflex Gate Driver Technology is presented with description on how it can significantly improve IGBT switching losses. Reflex gate driver technology allows up to twice as much output current from the same IGBT die surface area. Additional improvements are presented like the use of variable switching frequency and optimized control algorithms for better energy management.
Event
2014-11-19
The success of electric mobility is not only determined by the performance of the vehicles. From a customer perspective, the certainty to always be able to recharge the battery (private or public) is important. Solving the charging infrastructure issues turns out to be almost as challenging, since a vehicle is parked at very different locations during the course of a day and the still limited range requires more charging events. Different technical environments and customer expectations require very different solutions – from a basic cable with limited power and functionality to a fast charger with permanent communication skills between vehicle and grid. Based on our experience from multiple projects we will give an overview of the current situation in electric vehicle charging, describe the key challenges and provide insights for a successful way forward.
Event
2014-11-19
The presentation will provide background information and overview of EVSE. Further, descriptions of the technologies and application features in motorsports will be shown.
Technical Paper
2014-11-11
Stefano Frigo, Gianluca Pasini, Silvia Marelli, Giovanni Lutzemberger, Massimo Capobianco, Paolo Bolognesi, Roberto Gentili, Massimo Ceraolo
As a result of growing environmental concerns, in the last years more stringent regulations for vehicle fuel consumption and exhaust emissions have been developed. Car manufacturers have focused their attention on developments of hybrid configurations of their conventional vehicles. To this aim, advanced powertrains for efficient utilization of energy are adopted in order to recover energy release during braking and, as well, to enable the ICE to operate within its highest efficiency region. Additionally, depending on the hybrid powertrain architecture (i.e., series hybrid, parallel hybrid, range extended, etc.), the ICE can also be significantly downsized thus reducing fuel consumption. The application of a turbocharging system allows to further downsize the ICE, still keeping a reasonable power level. Besides, the possibility to couple an electric drive to the turbocharger (electric turbo compound) to recover the residual energy of the exhaust gases is becoming more and more attractive, as demonstrated by several studies in the open literature and by the current application in the F1 Championship.
Technical Paper
2014-11-11
Yoshimoto Matsuda
As for electric automobile, the mass production period has begun by the rapid progress of the battery performance. But for the electric motor cycle(MC), it is limited for the venture companies’ releases. To study the feasibility of the electric MC, we developed the prototypes in the present technical and suppliers’ environments and evaluated them by the practical view points. The developed electric MC has the equivalent driving performance of the 250cc inner combustion engine(ICE) MC and a cruising range of 100km in normal use. In the prototype development, the reliability and the ability of protection design of the battery in the whole vehicle against the environmental loads are mainly studied, especially, fever and cold, water, shock, and the accident impact. In addition, it is carried out the performance improvement by the heat management design of the motor to meet the practical use condition. From the usage points as MC, we developed the function of the 4-speeds dog gear MT and its electric control, reward ride function, the regenerative brake control, and the quick charge.
Technical Paper
2014-11-11
Hans-Juergen Schacht, Manuel Leibetseder, Niko Bretterklieber, Stephan Schmidt, Roland Kirchberger
Title: Control of a Low Cost Range Extender for L1e class PHEV two-wheelers Authors: Schacht, Bretterklieber, Schmidt, Kirchberger Affiliation: Institute for Internal Combustion Engines and Thermodynamics, Graz University of Technology Due to the small number of two wheelers in Europe and their seasonal use, their contribution to the total emissions has been underestimated for a long time. With the implementation of the new emission regulation 168/2013 coming into force 2016 for type approval, the two wheeler sector is facing major changes. The need to fulfil more stringent emission limits and the high demand on the durability of after treatment systems result in an engine control system that is getting more complex and thus costlier. Especially the low cost two wheelers with small engine capacities will be affected by increasing costs which cannot be covered be the actual competitive product price. Therefore, new vehicle concepts are likely to appear on the market. A vehicle concept of a plug in hybrid electric city scooter with range extender as well as the range extender itself have already been published in SAE Papers 2011-11-08 and 2012-10-23.
Event
2014-10-28
Event
2014-10-23
This session covers powertrain control processes related to achieving stringent market fuel economy, emissions, performance, reliability, and quality demands of hybrid and electric powertrains. Topics include the control, calibration, and diagnostics of the engine, powertrain, and supporting electromechanical subsystems related to energy management.
Event
2014-10-22
This session covers new production and near-production hybrid powertrains, hybrid architecture, and testing.
Viewing 1 to 30 of 2080

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