Filter results

Results (104)

Sort by:

Select all Select all

Page 2

VDI Wissensforum GmbH - Drivetrain for Vehicles 2017

Partial access

Select

VDI Wissensforum GmbH (ed.)

Drivetrain for Vehicles 2017

Series: VDI-Berichte

Volume 2313 2017

Results in this title

T. Seidel, A. Lange, F. Küҫükay DHT concepts based on DCT design S. 21-22

„… (PGS) and two shifting elements. The 4-speed DCT is part of a modular 8-speed DCT and can be derived …” „… the wet shifting elements. Since the recuperation efficiency benefits from higher transmission …” „… , bearings, shafts and shifting elements are present. As a consequence, mechanical losses are expected to be …”

A. Uhle Actuation synthesis for new hybrid transmission application (DHT) S. 135-136

„… influencing factors must be taken into consideration. The type and number of gear-shifting elements, the …” „… efficiency, package, costs and shifting characteristics as early as the advance engineering process. This …” „… method is based on systematically varying the parameters of shifting systems as a way of optimizing …”

M. Bhai, X. Shan Design of a hybrid mode and shift coordinator [hmsc] for the central control software of a range extender powertrain S. 137-138

„… shifting elements, instead of the friction elements (e.g. friction clutch or synchronizer ring), and are …” „… actuated by a shifting system based on AMT-technology (electromechanical driven shift drum). Furthermore …” „… interruption during gear shifting. This disadvantage of the AMT-technology can be compensated for with the …”

C. Wirth, A. Garcia AT or DCT? MCT – The best of both worlds! Synthesis and functionalities of multi-clutch transmissions S. 9-10

„… transmissions (AT) generally consist of a start-up element, multiple planetary gear stages and load-shift …” „… elements. The gears are power shifted. A significant advantage of this design is the high power density …” „… power-split. Hydraulic losses through open shift elements as well as leakage in the hydraulic oil supply of …”

doi.org/10.51202/9783181023136

VDI Wissensforum GmbH - Dritev – Drivetrain For Vehicles 2018

Partial access

Select

VDI Wissensforum GmbH (ed.)

Dritev – Drivetrain For Vehicles 2018

Series: VDI-Berichte

Volume 2328 2018

Results in this title

C. Sibla, A. Donges, F. Jauch Third Generation of ZF’s 8-speed automatic transmission – Reducing CO2 emissions in the 8HP transmission

„… functional enhancements, such as in the shifting sequence or the transmission system – increases in the gear …” „… pump losses, leakages, clutch drag losses or improving damping elements to further reduce engine …” „… number of gear sets as well as shift elements was varied, as shown in Fig. 1. The analysis was …”

M. Mileti, H. Pflaum, K. Stahl TorqueLINE cone clutch: Thermo-mechanical stability of cone clutches for ATs

„… of a dog clutch, a new shifting element – TorqueLINE Cone Clutch – has been developed in a joint …” „… TorqueLINE The working principle of the alternative shifting element for automatic transmissions can be …” „… TorqueLINE Cone Clutch - an innovative alternative shifting element – was developed in a joint project …”

M. Roßhuber, G. Schromm, K. Kranz The new BMW automatic transmission – Challenges in development

„… concept, are the gear set topology, the drive-off element with the torsional vibration damping system …” „… as gear number and subsequently the number of gear sets and shift elements represent the major …” „… than 8 gears is not effective, as additional shifting components and gear sets become necessary. This …”

R. Stehr, A. Götz, M. Ciesek, S. Köpfler, M. Finsterbusch, R. Willeke Future Schaeffler CVT concepts with an innovative actuation system

„… shifting. So the mechanical pump is increasingly coming into focus as the greatest source of loss in the …” „… clamping and variator shifting, are covered even at a low engine speed. For this reason, there is …” „… and shifting was already published back in 1999 [2], whereby one actuator supplies the clamping and …”

D. Güth, J. Haupt, T. Gassmann Seamless-shift two-speed eAxle with torque vectoring

„… efficiency-optimized region is much easier to realize due to the speed-speed shifting functionality. Introduction …” „… enables a high shifting comfort without interruption of traction and exhibit a high dynamic switching for …” „… shifting concept will be given and the efforts of the gear shifting functionality combined with a suitable …”

T. Smejkal, C. Wirth Innovative transmission topologies using the example of a P2-hybridtransmission for front-transverse applications

„… Automatikgetriebe nutzen zur Bauraumeinsparung entweder den Ansatz einer Schachtelung herkömmlicher Elemente oder …” „… nesting conventional elements or replacing friction discs by compact dog clutches. Furthermore, an often …” „… two load shift elements, can be synthesized. Nevertheless, these topologies allow for an unrestricted …”

G. van Spijk, A. Klaassen, A. van der Leest, A. Brandsma, M. Tweehuysen CVT: dedicated to hybrid solutions – Setting the benchmark on all KPI’s

„… powertrain hybridization. A crucial element in determining the functional possibilities, performance, energy …” „… minimal functional elements, contrary to adding electrification components to a conventional pure ICE …” „… components of the system are two variating elements: one Pushbelt CVT variator and one planetary gear unit …”

W. Guo, M. Jordan, X. Xu The application of fast and efficient clutch coordination control in a P2 hybrid automatic transmission

„… clutch and the engaging clutch, there is no power interruption. During the shifting process, the torque …” „… performance because they enable additional multi-step shifts and can change the target gear during a shifting …” „… shifting to gears sequentially. This means controlling four clutches at the same time during shifting. The …”

D. Evenschor, D, Dennin, P. Tenberge Automated design concept generation of automatic transmissions – Design concept generation based on results of transmission synthesis

„… same way. Analogous areas of shift elements are set-up along their shifting shaft (topology draft …” „… and thrust bearing JBe Journal bearing CS Central shaft TBe Thrust bearing SE Shifting element …” „… steps, ratio range, planet wheel rotational speed as well as state and load of shift elements …”

G. Bednarek, K. Geratz, H. Chariou The all-new 8-speed AT for the Opel Grandland X

„… Engagement VDI-Berichte Nr. 2328, 20184 The clutch apply shifting chart in Fig. 4 shows the shifting elements …” „… 1,221 1,235 1,231 1,22 1,24 shift elements 1,20 8th 0,673 0,673 0,672 7th 0,809 0,801 0,808 1,20 1,19 …”

A. Viehmann, R. König, S. Rinderknecht Investigation of gear shifts in a parallel-series hybrid powertrain with dog clutches in a demonstrator vehicle (two-drive-transmission with range-extender, DE-REX)

„… performed without interruption of driving force. Form-locking dog clutches are used as shifting elements …” „… of the DE-REX transmission The four shifting elements inside the transmission (C11, C12, C21 and C …” „… form-locking shift elements in a demonstrator vehicle and evaluating shift comfort and shift time Andreas …”

T. Högnäs, G. Beldie 48 volt torque vectoring electric rear drive module (eRDM) – Excellent driving dynamics with significant CO2 savings

„… combination of a 48V electric architecture with a the torque vectoring element, offering excellent driving …” „… architecture facilitates realization of the torque vectoring element of the system through a P3 HEV …” „… Topology and Functional Overview The system hardware features the traditional elements of a mechanical …”

G. Hellenbroich, I. Steinberg, J. Ogrzewalla Powershift capable 2-Speed Electric Drive Unit for Light – Commercial Vehicles with Short Time to Market

„… engine application, because they are primarily used as gear-shift clutches and the shifting frequency is …” „… , as no gear can be disengaged in a concept with only two speeds and no gear-shift actuating elements …”

N. Dudin, S. Ott, A. Albers, R. Misch, T. Rochlitzer Virtualizing validation processes of electrified powertrain generations

„… VE. It can be observed that establishing a consistent model-base through integrating elements of …” „… possible in physical vehicle environments. For example, the effects of optimizing the gear shifting logic …” „… shifting of the starting point of all phases throughout PEP to the point of availability of …”

F. Mühlfeld, M. Hochrein, N. Schmidt-Winkel, J. Buhl Electrified automated manual transmission (eAMT) – Synergies by combining an electric drive with an automated transmission

„… starting elements. From a commercial point of view and taking into account the development effort, the …” „… demonstrator vehicle and ZF electric axle drive The achieved shifting comfort can be derived from the …”

L. Dedeleit, M. Ayeb, L. Brabetz Short circuit calculation of permanent magnet synchronous machines with comsol multiphysics

„… � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 45 C. Körtgen, Institute for Machine Elements and Systems Engineering of RWTH Aachen University …” „… . Pelger, G. Jacobs, IInstitute for Machine Elements and Systems Engineering of RWTH Aachen University …” „… position to achieve higher shifting comfort and safe dog clutch engagement …”

doi.org/10.51202/9783181023280

VDI Wissensforum GmbH - Kupplungen und Kupplungssysteme in Antrieben 2019

Partial access

Select

VDI Wissensforum GmbH (ed.)

Kupplungen und Kupplungssysteme in Antrieben 2019

Series: VDI-Berichte

Volume 2341 2019

Results in this title

A. Dempfle, P. Fischer, P. Echtler, A. Damm, F. Matthies, J. Müller, K. von Rüden, T. Köhler Schaltkomfortbewertung konischer Schaltelemente mit Formschluss für lastschaltbare Automatikgetriebe S. 155-168

„… quality for conical shifting elements with form fit for powershift automatic transmissions Andreas …” „… interpreted and evaluated for the most promising variant of this new shifting element: A functional …” „… . Literaturverzeichnis [1] Tonius, N.; Bertsche, B.; Dörr, C.: Dog clutches as innovative shifting elements for …”

doi.org/10.51202/9783181023419

VDI Wissensforum GmbH - Dritev – Drivetrain For Vehicles 2019

Partial access

Select

VDI Wissensforum GmbH (ed.)

Dritev – Drivetrain For Vehicles 2019

Series: VDI-Berichte

Volume 2354 2019

Results in this title

M. Horn, F. Kutter, B. Vahlensieck Advanced development of dedicated hybrid concepts – Systematic search for optimal powertrain concepts

„… elements at the planetary gear sets from the outside with state-of-the-art shifting forks. The coaxial EM2 …” „… influenced by the position of the differential spur gear. Shifting elements at the layshaft or the input …” „… outside with shifting forks to access shifting elements placed near the gear sets. Therefore there is a …”

H. Merkel Solutions for increased power density at shifting clutches

„… BW has produced special friction materials. For shifting clutches In Step AT or shift elements for …” „… Solutions for increased power density at shifting clutches Dipl.-Ing.(FH) Harald Merkel …” „… increase the power density of shifting clutches. New friction materials with increased static coefficient …”

K. von Rueden, C. Danzer, J. Liebold, T. Mueller, T. Hirschbeck 1, 2 or 3 – how much it would be? Evaluating the need of multispeed electric drives coming from different perspectives

„… of comfort, excessive heat input in the shift element and high shifting times in comparison to the 3 …” „… a result of internal friction in open switching elements (cf. source [Alt15], [Gas17]). Whether the …” „… , is not sufficient to compensate the additional mechanical loss mechanisms, such as switching elements …”

A. Viehmann, J.-E. Schleiffer, S. Rinderknecht Evaluation of the dedicated range-extender transmission powertrain concept DE-REX regarding efficiency, costs and complexity – Comparative assessment of electric and hybrid powertrain configurations b...

„… . Therefore, the “1EM96kW,2i” configuration would require powershiftable friction elements for shifting …” „… encountered by applying powershift elements like friction clutches (e.g. dual clutches) which in term are …” „… costly and burdened with a high application effort (e.g. lifetime adaption of the friction element …”

C. Schoerghuber, I. Müller, H. Wiener Dedicated hybrid transmission for commercial vehicle applications – Mechanical layout, system analysis and simulation of a dedicated hybrid transmission for commercial vehicles

„… shifting elements again positively influencing product costs compared to using e.g. synchronizations …” „… developed DHT including all required powertrain elements is depicted. Fig. 1: Schematic layout of a …” „… point shifting or boosting. Thus, there is one degree of freedom for the hybrid controller for the …”

H. Göbbels, S. Scholz, S. Volkmer Efficient 6-speed manual transmission for modern downspeeding solutions

„… design of various efficiency measures were used. With a shifting travel of only 50 mm, the MQ281 …” „… guarantees maximum shifting comfort. All forward gears, as well as the final drive, are hard-machined, and …” „… . Accordingly, the development focused on a large ratio spread, best-of-class shifting comfort, and high cost …”

U. Stockinger, H. Pflaum, K. Stahl Single vs. multi-cone synchronizers with carbon friction lining – A comparison of load limits and deterioration behavior

„… widely used in gear boxes of car and truck transmissions. These machine elements synchronize the …” „… than that of single cone synchronizers. Higher friction torque results in faster shifting times, but …” „… [4] measure the lowest efficiency for an increasing shifting force and the highest efficiency for a …”

A. Kinigadner, T. Biermann Schaeffler eAxle family – future solutions for the electric drivetrain

„… applications without torque interruption during shifting. By choosing the right gear ratios in combination …” „… gear and 5 in second. The design of the shifting module, including the actuator, is therefore …” „… and cleverly implemented in the shifting strategy. Fig. 10: Stick diagram of a power shift …”

H. Gürbüz, S. Ott, A. Albers Potentials for improving the system behaviour of highspeed clutches for BEV using optimal transmission springs

„… installation space of the shifting elements in recent years. Further advantages have been demonstrated with …” „… the high-speed range in the early phase of product development. Shift elements, clutches and brakes …” „… maximize the input clutch speed and identify today's limits. In addition, the load shifting capability and …”

S. Kurokawa, M. Kunihisa, Y. Oyama Development of a new next-generation CVT for small cars

„… the constituent elements and their combinations were subjected to a decision analysis. As a result …” „… (3) Addition of rigidity elements between the engine cylinder head and transmission case The …” „… , the shift lines have been designed so that the seamless shifting inherent to the CVT suppresses the …”

A. Moser, F. Brezger Efficiency improvements in transmissions using new latching technologies in clutch & hydraulic actuation systems

„… uninterrupted shifting during acceleration. In conventional vehicles there is a trend to even higher number of …” „… integrated. This type of transmission needs a hydraulic system for shifting and usually also for keeping …” „… feedthroughs for actuation. In a typical 8-speed automatic gearbox with 5 shift elements there are 3 clutches …”

G. Hellenbroich Low-cost DCT for emerging markets incl. 48 V hybridization

„… machine for charging and boosting. This is impossible to guarantee when there is a lot of gear shifting …” „… DCT gearset on the market. The “Aux” shaft including the shift element D, the two idler gears EM1 and …”

W. Wenzel, M. Eglinger, M. Li, C. Sieg, J. Hengst, F. Küçükay Next generation of 48V HEV

„… calculated within the transmission module. Based on these results, the propulsion and launch element module …” „… of one operating mode is set to 2 s. Mode shifting events are limited with an operation mode …” „… a lower mechanical complexity resulting from fewer gear meshes and the absence of a launch element …”

doi.org/10.51202/9783181023549

VDI Wissensforum GmbH - Nutzfahrzeuge 2017 – Commercial Vehicles 2017

Partial access

Select

VDI Wissensforum GmbH (ed.)

Nutzfahrzeuge 2017 – Commercial Vehicles 2017

Series: VDI-Berichte

Volume 2298 2017

Results in this title

F. Sauter, H. Mozer, B. Fessler, J. Glückler Development of an 8-speed Automatic Transmission for Medium-duty Trucks and Buses – Market analysis, selection, detailed definition and comparison of concepts and rollout of a segment-optimized tra... S. 197-208

„… shifting (which has always been an elementary feature in North America) will become an increasingly …” „… comfort and performance – by power shifting, preferably in all gears and also when skipping gears …” „… 6-speed designs with 3 gear sets and 5 shift elements to 12-speed systems with 5 gear sets and 7 …”

S. Schönherr, S. Kopp, M. Hellmold The NEOPLAN Tourliner – leading the way in CO2 reduction through aerodynamically optimised design – Optimised consumption with consideration to various vehicle requirements S. 115-124

„… Tourliner Sophisticated design elements for passengers and drivers The colour of the interior has …” „… fuel savings of up to 10%. The long axle ratio of i=2.73 and the optimised shifting strategy contribute …”

B. Grzegorzewski The next generation of natural gas trucks – Development of a 4x2 tractor with a natural gas engine S. 223-234

„… treatment system. A TWC (three-way catalytic converter) element is sufficient to respect the Euro VI …” „… engine leads to a longer shifting time. This is probably the most obvious difference in terms of …”

doi.org/10.51202/9783181022986

1

2

3 ... 21