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Einer der inhaltlichen Schwerpunkte des Tagungsbands zur ATZlive-Veranstaltung "Der Antrieb von morgen 2018" werden Energieträger, insbesondere optimierte Kraftstoffe sein. Die Tagung ist eine unverzichtbare Plattform für den Wissens- und Gedankenaustausch von Forschern und Entwicklern aller Unternehmen und Institutionen, die dieses Ziel verfolgen.



Electric Axle Drives – scalable propulsion system for electrified powertrains

Bei der Elektrifizierung des Antriebsstranges spielen elektrische Achsen eine entscheidende Rolle. Der Einsatz ist sowohl für hybridische als auch für rein elektrische Antriebskonzepte sinnvoll, wodurch sich anwendungsbezogen sehr verschiedene Leistungs- und Bauraumanforderungen ergeben. Funktional sind verschiedene Optionen, wie z.B. Parksperre, Differentialsperre oder Torque Vectoring zu berücksichtigen. Zur Optimierung von Bauraum, Gewicht und Kosten zeigt sich ein klarer Trend, Getriebe, Elektromotor und Leistungselektronik zu einem Aggregat zu integrieren. Dazu sind diese Hauptkomponenten so zu modularisieren, dass eine einfache Skalierbarkeit bei gleichzeitiger Optimierung des spezifischen Bauraums möglich wird.
Auf der Basis des Schaeffler Leichtbaudifferentials lassen sich Getriebelösungen mit hoher Leistungsdichte in koaxialer oder achsparalleler Ausprägung darstellen. Für den elektrischen Antrieb wurde ebenfalls ein skalierbares Modulkonzept entwickelt. Neben Magnetkreisen unterschiedlicher Technologie wurden für die Leistungselektronik Baugruppen definiert, die die hohen Anforderungen an Zyklenfestigkeit, Leistungsdichte und Robustheit in Bezug auf die Umgebungsbedingungen im Aggregat erfüllen. Der Beitrag zeigt den Aufbau der mechanischen und elektrischen Module und deren funktionale und physikalische Integration in eine spezifische elektrische Achse.
Thomas Pfund

MAHLE Efficient Electric Transport – an efficient system solution for the electrified urban mobility

Driven by numerous trends and challenges the automotive industry faces a tough transformation. This affects car manufactures as well as the whole supplier industry. The main challenge thereby is the further reduction of CO2 emissions.
Daniel Rieger, Andreas Kemle, Alfred Elsäßer, Marco Warth, Otmar Scharrer

AllCharge™ – a user-centric solution for traction and charging

The key purpose of the powertrain of an electric vehicle is to provide adequate driving power and sufficient energy to fulfil the range request of the driver. The question when, where and how to charge the battery gets increasingly in focus. Maximizing the degree of freedom to charge compatible to different AC and DC power levels at any charging point is an important step to strengthen the attractiveness of electric vehicles. Furthermore vehicles with 60–100 kWh battery capacity can only be operated with appropriate high charging power (> 100 kW) at longer distances. Nevertheless it´s also important to provide highest charging efficiency for the majority of typical charging events at 3 to 11 kW. A useful functionality of an electric vehicle is also to provide 230 V AC electric power to devices anywhere (V2D). Just as well electric power of the battery can be used to shave peak loads of the power grid applying (V2G). This integration contributes to smart grid features but also requires compatibility of an electric vehicle to classical electric installation at optimal cost. The Continental AllCharge System offers a forward-looking technology.
Friedrich Graf, Martin Brüll, Siegmund Deinhard

SOFC EV range extender systems for biofuels

The automotive industry is heavily investing in Battery Electrical Vehicles (BEV) and to a far lesser extend in Fuel Cell Electrical Vehicles (FCEV). BEVs provide the highest overall energy efficiency but require very large and expensive batteries for long driving ranges. Additionally the recharge time of batteries remains a concern, as quick charging will be limited by electrical grid stability requirements.
Juergen Rechberger, Michael Reissig, Vincent Lawlor

Innovative propulsion systems with fuel cells

The limitation of global warming to “less than 2 °C till the end of the 21st century compared to pre-industrial levels” as agreed upon during the 2015 Climate Change Conference in Paris can be regarded as the main challenge of our time [12]. As the anthropogenic climate change has far reaching consequences from weather extremes with increasing damage compensations, from health issues to population migration, the consistent decarbonisation of our economy is mandatory. Based on this insight, the UN and the EC have recently set targets for reduction of greenhouse gases on an international and a national level.
Manfred Klell, Alexander Trattner

A comparative evaluation on state of charge estimation methods for Lithium ion batteries of electric vehicles

Due to strengthening enforcement of environmental laws and regulations, electrification of the automotive powertrain has been advancing so rapidly that rechargeable batteries used as a source of power are becoming increasingly important. Among them, lithium-ion batteries (LiBs) are expected to evolve at a high rate regarding light weight, high energy density and long lifetime. In order to make the most capacity of lithium-ion batteries in the strict automotive environment, the battery management system (BMS) constantly monitors the state of the batteries, and estimates the state-of- charge (SOC) for avoiding overcharge / overdischarge of the batteries. This paper focuses on the existing methods for estimating SOC from voltage, current and temperature of automotive LiBs, performs comparative evaluation, and proposes a process for SOC estimation.
Fuliang Huang, Masashi Murohoshi, Akira Ichinose, Tingting Sui

A test center for aging analysis on Li-ion cells for automotive series application – test equipment, test procedures and cell aging effects

Electric vehicles (EV) are a promising alternative to vehicles based on combustion engines: they allow for emission-free driving and eliminate the dependence on fossil fuels. However, the main limiting factor of contemporary EVs is energy storage, which usually consists of Lithium ion (Li-Ion) cells. In comparison to fuel tanks in combustionbased vehicles, today’s Li-Ion batteries are heavy, require long recharging times and provide only a limited driving range.
Peter Haußmann, Joachim Melbert

Development methods for RDE-compliant powertrains

The ongoing change in mobility philosophy and the increased awareness regarding emission influence create new challenges for the powertrain development with focus on efficiency enhancement and emission reduction, especially under real driving conditions. As a result, the emission behaviour shows a high significance in addition to drivability, taking into account the overall lifetime and the increasing spread of load and gradient. At the same time, development cycles are becoming shorter and development costs are rising due to higher complexity and number of derivatives. This requires a systematic and efficient approach early in the powertrain development phase. To achieve the ecological and economic development objectives within shorter product cycles, the diversity of different influencing factors must be considered, analysed and, if necessary weighted according to their importance. This requires the use of a suitable development methodology, including target-oriented simulation tools, dynamic measurement techniques and a profound understanding of physical phenomena and mechanisms.
In order to combine the increasingly complex interactions and the upcoming development targets, APL has developed a method chain based on a real driving data base (APL TrackKit) with different powertrain setups. The collected data is classified in terms of combustion process, specific power, transmission spread and vehicle-specific driving resistances. Based on a Design of Experiments (DoE) approach, a target configuration for the future powertrain setup is derived, considering the main influencing factors such as vehicle, driver, route and environmental parameters are identified. A systematic parameter variation of hardware, operating strategy and calibration is performed on the test bench, using a hardware-in-the-loop configuration with a real time simulation environment. The main optimization targets are energy efficiency, limited emissions and driving behaviour.
The combination of state-of-the-art engine test benches, a simulated vehicle environment and online-tools as well as approval-relevant exhaust gas measurement technology of the RDE legislation enables optimal calibration and specific selection of hardware components in relation to the RDE-development both in the early development phase and during development.
Tobias Mink, Christian Lensch-Franzen, Martin Schäfer, Alexander Ebel

Innovative thermal management and waste heat recovery – a combination of technologies for sustainable powertrains

Driven by the goal to reduce CO2 pollutions in the European Union by 40% until 2030[1] the fleet average CO2 emissions of vehicles sold in the EU have to be reduced to 95 g/km in 2021 [2]. A big opportunity to achieve these goals is an increased degree of electrification of powertrains and vehicles as currently under development. So far pure electrically driven vehicles have not reached a level of acceptance that leads so significantly reduced CO2 emissions.
Thomas Arnold, Volker Ambrosius, Matthias Krause


Fahrzeuge von morgen werden noch lange Zeit verschiedene Antriebsarten nutzen. Auch der Dieselmotor findet seinen Platz, allerdings gewährt ihm die Elektromobilität keinen Aufschub. Mit jedem Kilometer mehr elektrische Reichweite wächst die Kritik am Verbrennungsmotor, wie die emotionale Diskussion auf der Fachkonferenz von ATZlive „Der Antrieb von morgen“ zeigt.
Andreas Burkert
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Und alles läuft glatt: der variable Federtilger von BorgWarner

Der variable Federtilger von BorgWarner (VSA Variable Spring Absorber) ist in der Lage, Drehschwingungen unterschiedlicher Pegel im laufenden Betrieb effizient zu absorbieren. Dadurch ermöglicht das innovative System extremes „Downspeeding“ und Zylinderabschaltung ebenso wie „Downsizing“ in einem bislang unerreichten Maß. Während es Fahrkomfort und Kraftstoffeffizienz steigert, reduziert es gleichzeitig die Emissionen, indem der VSA unabhängig von der Anzahl der Zylinder und der Motordrehzahl immer exakt den erforderlichen Absorptionsgrad sicherstellt.
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AVL analysiert im Serien Batterie Benchmark Programm als neueste Fahrzeuge den Jaguar I-Pace und den Hyundai Kona

Das AVL Battery Benchmarking Programm analysiert auf Basis unterschiedlicher Faktoren die Wettbewerbsfähigkeit von Großserienbatterien. Kürzlich wurden die Tests des Tesla Model S abgeschlossen. Neu auf dem Prüfstand sind der Jaguar I-Pace, sowie der Hyundai Kona.
Mehr dazu erfahren Sie hier!


Konnektivität im autonomen Fahrzeug

Neue Verbindungen für zuverlässige Datenübertragung
Ohne ultimative Konnektivität und schnelle zuverlässige Datenübertragung ist das autonome Auto nicht darstellbar. Dafür müssen die Verbindungsstellen extrem anspruchsvolle Herausforderungen meistern. Mehr dazu erfahren Sie hier!