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VDI Wissensforum GmbH (ed.)

Dritev 2022

Series: VDI-Berichte

Volume 2401 2022

Results in this title

M. Hein, S. Prinke, A. Damm, P. Fischer Testing of shift elements – Standardized Methods, State of the Art and Future Challenges S. 73-94

„… function, NVH-behavior or efficiency (i.e. drag torque). Functionality is confirmed by friction …” „… . The NVH-behavior of shift elements is mainly affected by the friction characteristic and the …” „… as well as the wear behavior of the analyzed Friction Systems (FSY). However, there are further …”

P. He, A. Eßer, S. Rinderknecht, M. Schmiedt A Degradation Model of a Wet Friction Clutch based on Theoretical and Experimental Analysis and the Application for a Condition Monitoring Method S. 303-320

„… system behavior of a vibrating powertrain including a friction clutch. The aim is to investigate how the …” „… friction behavior. However, the interaction effect between the material and the ATF degradation cannot be …” „… Equation (9), the friction behavior, including the degradation procedure, can be mathematically described …”

G. Göppert, M. Adrian AI Approach to Wet Friction Torque Model Adaptation S. 321-334

„… AI Approach to Wet Friction Torque Model Adaptation Georg Göppert, Marcel Adrian, Schaeffler …” „… of a friction system plays a central role for example in P2 hybrids to fulfill seamless shifts or …” „… demonstration of feasibility has two aspects. The one aspect is the technical question, if wet friction torque …”

F. Schuchter, M. Schönstein, K. Bause, A. Albers Temperature Modelling of a Dual Clutch with Artificial Neural Networks S. 335-346

„… temperature are the friction power and the cooling behavior. The frictional power is largely determined by the …” „… with a paper friction lining (see Figure 1). Temperature measurements are conducted with a telemetry …” „… friction factor of the clutch. The friction factor is very variable in the friction pairings that are used …”

H. Spånberg Electric Torque Vectoring Disconnect unit, eTVD S. 253-266

„… , meaning the oil is incorporated within the unit. The friction system consists of sintered brass friction …” „… purpose/application. By optimizing the piston size and number of friction discs, the same torque capacity and disc …” „… by applying pressure generated by the BorgWarner Generation VI actuator, on the friction discs. The …”

J. Gindele, U. Franzmann, L. Herdle, A. Pawlenka The Magna 7HDT400 for BMW’s new 48V hybrid drive family S. 1-12

„… , and supply of the cooling oil for the EM. The roller bearings now have friction-reduced sealing …” „… . Finally, using asymmetrical gearing reduces tooth friction losses. Figure 3 illustrates the asymmetrical …” „… gearing. A larger pressure angle reduces specific sliding. This reduces friction in the tooth mesh and …”

A. Eßer, J. Mölleney, S. Rinderknecht Potentials to reduce the Energy Consumption of Electric Vehicles in Urban Traffic S. 133-152

„… dog clutches without friction surfaces, allowing shifting without interruption of traction force …” „… (I-AMT) or a dual-clutch transmission (DCT). The friction clutch(es) and its periphery are cost-intensive …” „… EMs during shifting and simple, low-cost and energy-efficient dog-clutches without friction surfaces …”

Z. Liu, V. Stegmayer, S. Rinderknecht, U. Fechter Multiphase CFD investigation of splash lubrication S. 169-184

„… und dem analyti-schen Ansatz für alle Zahnräder. Abstract To investigate the lubricant behavior and …” „… the right wetting behavior of the gears. At the numerical simulation step, the Navier-Stokes equations …” „… lubricant flow be-havior and the churning loss on the gears are analyzed in three dimensions. Besides the …”

F. Lagier, N. Freund, K. Bause, S. Ott, A. Albers Simulation-based evaluation of high-speed PEEK gears in automotive powertrains and design of a validation environment for high-speed gears S. 223-240

„… and to design a test bench that is able to analyze the behavior of PEEK gears under high turning rates …” „… torque is lowered, the be-havior of polymers as novel automotive gearing materials is not yet …” „… gliding speeds and challenges the gear design in terms of load-carrying capacity, NVH behavior, and …”

S. Cortès, A. Albers, C Dettmann, P. Boche Chassis Dynamometer – a development environment for calibration and validation of vehicle drivetrains in context of RDE legislation? S. 347-364

„… condi-tions, for example the road slope or actual road friction coefficient, it is not possible to repro-duce …” „… accompanied by a significant expansion of the operating range of power-trains, emission behavior and fuel and …” „… control system is essential in order to fully map the recuperation behavior as well. Initial positive …”

doi.org/10.51202/9783181024010

VDI Wissensforum GmbH - Kupplungen und Kupplungssysteme in Antrieben 2021

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VDI Wissensforum GmbH (ed.)

Kupplungen und Kupplungssysteme in Antrieben 2021

Series: VDI-Berichte

Volume 2382 2021

Results in this title

D. Groetsch, K. Voelkel, H. Pflaum, K. Stahl Echtzeit-Temperaturberechnung und Temperaturprädiktion nasslaufender Lamellenkupplungen S. 115-128

„… temperature-dependent friction behavior is assumed. The model is validated on a test rig and in a vehicle transmission …” „… strategy. In addition, they show a strong temperature-dependent friction behavior. The model shows a very …” „… Behavior of Innovative Carbon Friction Linings for Wet Multi-Plate Clutches,” Forschung im Ingenieurwesen …”

M. Hoić, B. Škugor, A. Miklik, J. Deur, A. Tissot Experimental characterization and modeling of dry clutch wear with emphasis on fading effect S. 265-278

„… friction [2]. While typically associated with manual transmissions (MT), automated dry clutches have also …” „… features of friction material: the coefficient of friction (COF) [9, 10] and wear [11]; both of which are …” „… even above 450 C̊ [18] depending on friction material and on the clutch operation scenario [19], and …”

K. Völkel, H. Pflaum, K. Stahl Einlaufverhalten nasslaufender Lamellenkupplungen im Schlupfbetrieb S. 59-72

„… start of operation in which the friction behavior can change significantly by adjusting the friction …” „… surfaces. This running-in behavior can strongly depend on the characteristics of the friction system …” „… parameters for slip operation mode. The running-in behavior of clutches with different friction systems is …”

T. Schneider, K. Völkel, H. Pflaum, K. Stahl Einfluss von Vorschädigung auf das Reibungsverhalten nasslaufender Lamellenkupplungen im Dauerschaltbetrieb S. 73-90

„… ] Schneider, T., Voelkel, K., Pflaum, H. u. Stahl, K.: Friction Behavior of Pre-Damaged Wet- Running …” „… Dauerschaltbetrieb Influence of Pre-damage on the Friction Behaviour of Wet-running Multi-plate Clutches in an …” „… [1] Anderson, A. E. u. Knapp, R. A.: Hot spotting in automotive friction systems. Wear 135 (1990) 2 …”

G. Göppert Adaptation of a Wet Clutch Torque Model in Electrified Drivelines S. 333-0

„… , setting and especially aging effects of friction partners lead to changes in the torque transfer function …” „… on the simple relation T = m μ r F, comprising the number of friction elements m, friction …” „… constant, the other quantities might change with usage. The effective number m of friction elements is …”

V. Föge, S. Blaschke New semi-dry friction solution for highly integrated active torque-controlled drives S. 103-114

„… New semi-dry friction solution for highly integrated active torque-controlled drives Volker …” „… to reconcile these drastic actions towards efficiency enhancement with constant friction performance …” „… development process from raw materials to the final application within the Miba Friction Division. 1 …”

J. Seiter, C. Acker, T. Cassiani, A. Grossmann, T. Kubicek, S. Morel NVH-optimization for drivetrains of commercial vehicles with a newly slipping absorber S. 181-194

„… to main- and PTO-drivetrain inertia and angular acceleration. A friction between absorber mass and …” „… 30 % to 50 %. This is an effective improvement of the impact behavior of a divided flywheel which is …” „… connection element between absorber mass and drivetrain. The torque limiter is a package of friction and …”

S. Chen, K. Bause, C. Mandel, A. Albers, K. Erdmann Modellierung und Bewertungsansatz für das tribologische Systemverhalten zur Vorhersage der Schaltqualität der Kegelkupplung in elektrifizierten Antriebssträngen S. 145-158

„… relations between design and behavior parameters of the synchronization system in order to predict the …” „… tribological system behaviors. In this way, the system behavior will be predicted already in the early phase …” „… has been assembled. The evaluation approach for system behavior of the synchronization is based on the …”

T. Skubacz, C. Burkhardt, S. Krischke Innovative Schaltelemente für elektrische und hybride Antriebsstränge S. 223-234

„… efficiency for holding and changing the state and low drag and friction losses in both states (open/closed …” „… ). Both solutions are based on a bistable behavior ("stable state") and require no actuation force in …” „… to be reduced. The use of friction elements instead of positive engagement connections also enables …”

H. Gürbüz, K. Bause, S. Ott, A. Albers Testmethodik zur Verbesserung der Kupplungsdynamik und Reduzierung der Schleppverluste in nasslaufenden Lamellenkupplungen durch Getriebefedern S. 43-58

„… to improve the control and comfort behavior. Furthermore, drag losses in the open state of the …” „… the losses are also required. This paper presents a test methodology to improve the system behavior …” „… springs contribute to the parallel closing of all friction pairs and prevent torque shocks. The presented …”

R. Fehrenbacher, K. Bause, S. Ott, A. Albers Aufbau eines Vorgehensmodells zur Analyse von Haft-Gleit-Übergängen trockenlaufender Friktionspaarungen S. 291-304

„… fundamental importance for the functional performance of dry-running clutches and brakes. The static friction …” „… without any friction partners' relative movement. Understanding the adhesion-sliding transition is the …” „… collectives based on different friction pairings. The measures provide information about the tribology system …”

doi.org/10.51202/9783181023822

VDI Wissensforum GmbH - Kupplungen und Kupplungssysteme in Antrieben 2019

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VDI Wissensforum GmbH (ed.)

Kupplungen und Kupplungssysteme in Antrieben 2019

Series: VDI-Berichte

Volume 2341 2019

Results in this title

U. Stockinger, K. Völkel, H. Pflaum, K. Stahl, K. Mühlenstrodt, D. Lipinsky, H. F. Arlinghaus Analyse tribologischer Schichten mit der Flugzeit-Sekundärionenmassenspektrometrie (ToF-SIMS) – Additiveinflüsse auf das Reibungsverhalten nasslaufender Lamellenkupplungen S. 197-210

„… Zusammensetzungen der Grenzschichten bei ähnlichem Reibungsverhalten. Abstract The friction behavior of wet …” „… ) were performed to correlate friction behavior and composition of the boundary layer. The friction …” „… behavior was analyzed for paper type friction linings and lubricants of a known composition on the …”

M. Hoic´, B. Škugor, J. Deur, A. Tissot Experimental characterization and modeling of automotive dry clutch friction lining wear – Clutch lifetime prediction S. 25-36

„… vorgestellt. Abstract The paper presents results of experimental characterization of dry clutch friction …” „… . Characterization relates to both run-in effects and stationary wear behavior with respect to various influencing …” „… . 1. Introduction The term dry friction wear encompasses different physical processes. While a …”

T. Klotz, S. Ott, A. Albers Analyse des Schädigungs- und Erholungsverhaltens trockenlaufender Friktionspaarungen S. 37-46

„… . K.: Influence of modified phenolic resins on the fade and recovery behavior of friction materials …” „… . K.: Friction properties of a phenolic resin filled with iron and graphite - Sensitivity to load …” „… , Wear 259 (2005) 7-12, S. 1068– 1078 [5] Rakowski, W. A.: The surface layer of friction plastics, Wear …”

K. Völkel, H. Pflaum, K. Stahl Einflüsse der Stahllamelle auf das Einlaufverhalten von Lamellenkupplungen mit Papierreibbelag S. 231-246

„… Influences of the Steel Plate on the Running-In Behavior of Wet Multi-Plate Clutches with Paper Friction …” „… a result of manufacturing may influence the friction- and running-in behavior. Distinct changes of …” „… the friction behavior can occur and make the actuation of the clutch challenging. This contribution …”

T. Schneider, M. Strebel, H. Pflaum, K. Stahl Spontanschädigungsverhalten von nasslaufenden Lamellenkupplungen mit organischen und metallischen Reibbelägen S. 275-290

„… Reibbelägen Spontaneous damage to wet-running multi-plate clutches with organic and metallic friction …” „… multi-plate clutches with organic and metallic friction materials is reported with regard to spontaneous …” „… reveal that the specific friction loss, which a clutch can bear, increases as the maximum of the …”

H. Lührs, K. Sittig, T. Niendorf Cladded steel for clutch disc carriers – On the formability and wear properties S. 247-260

„… of 2.15 mm were mounted to the cross beam with friction discs as spacer. The disc carrier was …” „… is a major parameter determining the wear behavior, the wear rate for the splined shaft connections …” „… and, thus, the wear behavior of a real clutch is experimentally determined as close as possible based …”

H. Gürbüz, S. Ott, A. Albers Entwicklungsansätze für innovative Hochdrehzahlkupplung in E- Fahrzeugen S. 85-100

„… order to find economic solutions to positively influence the system behavior of the friction clutch …” „… strength and controllability. With the main goal of systematically researching and developing new friction …” „… is quantified. Furthermore, the design of the friction system for fiber composite and Sinter friction …”

doi.org/10.51202/9783181023419

VDI Wissensforum GmbH - Kupplungen und Kupplungssysteme in Antrieben 2017

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VDI Wissensforum GmbH (ed.)

Kupplungen und Kupplungssysteme in Antrieben 2017

Series: VDI-Berichte

Volume 2309 2017

Results in this title

G. J. Meingaßner, H. Pflaum, K. Stahl Reibungsverhalten nasslaufender Lamellenkupplungen am Übergang Haftreibung – Gleitreibung S. 159-172

„… Friction Behavior of Wet Multi-Plate Disk Clutches at the Transition from Static to Dynamic Friction …” „… understanding of the friction behavior of disk clutches under microslip conditions as well as the transmittable …” „… static torque without slip. Therefore, basic experimental investigations on the friction behavior under …”

F. Markowsky Echtzeit-Analyse des Trennverhaltens von Lamellenkupplungen – Einfluss auf die Systemfunktion und dessen Reproduzierbarkeit S. 125-134

„… wet running friction systems has set itself the goal of presenting the interaction of the …” „… . In addition to the in the industry already established high performance friction test rigs, Miba has …” „… the exact position of wet running friction lamellas in real time is explained. In particular …”

K. Völkel, F. Wohlleber, H. Pflaum, K. Stahl Kühlverhalten nasslaufender Lamellenkupplungen in neuen Anwendungen S. 215-226

„… household. Thus, insight into the thermal behavior is crucial not only in the friction phase but also in …” „… multi-disk clutches, beside optimization of friction lining and lubricants, new groove arrangements are …” „… friction and the cooling phase of the load spectrum is determined for various clutch sizes, friction …”

C. Schlösser, F. Kohlmann, M. Fister Verteilung der Flächenpressung im Reibspalt – Vorstellung und Anwendung eines neuen Messverfahrens für nasslaufende Anfahrkupplungen S. 241-258

„… processes in the tribological friction gap decisively determine the operating behavior of a wet running …” „… behavior of the friction disc package. Specific knowledge of the surface pressures during the clutch …” „… multi-disc clutch. The measurement of such operating variables allows a detailed view of the friction …”

F. Frietsch, B. Wolf Hydraulische Betätigungssysteme für nass laufende Kupplungen – Vorhandene Potentiale nutzen S. 205-214

„… . At the end of the article it is described how to calculate the NVH behavior of a clutch system and …” „… ] BEARINX-online Easy Friction, Berechnungstool, Schaeffler, https://bearinx-onlineeasy-friction …”

P. Mall, A. Krüger, A. Fidlin Automatisierte Schwingungsdämpferkonzipierung für Sportwagen in frühen Entwicklungsphasen S. 417-430

„… : Springer-Verlag 2014 [8] Fidlin, A. u. Mall, Ph.: On the effect of the distributed friction in the arc spring on …” „… the dynamic behavior of the automotive transmission. International Conference on Engineering …”

doi.org/10.51202/9783181023099

VDI Wissensforum GmbH - Gleit- und Wälzlagerungen 2023

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VDI Wissensforum GmbH (ed.)

Gleit- und Wälzlagerungen 2023

Series: VDI-Berichte

Volume 2415 2023

Results in this title

M. Busch Numerical simulation of rotor and gas-film dynamics in Schaeffler’s foil air bearings S. 221-234

„… ]. • The contacts between the foils and the contacts at the bearing shell consider Coulomb friction according to Ref. [25]. This can affect the damping behavior …” „… radial Schaeffler bearing is shown at varying speed and clearance, plot (b) shows the corresponding friction loss. As the speed increases, the hydrodynamic support improves and the film thickness rises almost linearly. However, the behavior depends also on the clearance which has a nonlinear influence. At very small …” „… foil bearing. As can be seen, the friction optimum depends significantly on the clearance, especially if the clearance is very small. The nonlinear influence on the friction behavior can be verified with test‐rig measurements, see Fig. 9. The friction …”

V. Hoffmann, D. Bartel Einfluss der Kranzdicke auf die Gleitlagerung des Rades eines Planetengetriebes S. 163-176

„… planetary rim thickness on the bearing behavior of journal bearings, a new calculation method is applied, in …” „… which the deformation of all components involved is taken into account and the bearing behavior of the …” „… possible mixed friction conditions. It is shown that low calculation times can be achieved with the help of …”

L. Maccioni, F. Concli Flows in Oil-Bath Lubricated Tapered Roller Bearings: CFD Simulations Validated via PIV S. 247-266

„… behaviors within TRBs. The first goal of the present paper is to introduce Computational Fluid Dynamics …” „… appropriate service life through friction reduction and heat removal [1]. On the other hand, the lubricant …” „… flooded conditions, the axial flow in TRBs has very different behavior between high and low speeds, i.e …”

H. Grillenberger Wälzlagergeräuschberechnung – Unterschiedliche Phänomene und deren Simulationsansätze S. 267-278

„… stiffness influences the vibration behavior of the rotary system and thus also the transfer paths and …” „… friction-induced vibrations. Noise simulations are typically performed in the time domain using finite element …” „… , the cage dynamics and the system behavior must be included - in this case, the calculation is …”

O. Atalay, O. Koch, V. Kramer, M. Bartz, S. Goetz, S. Wartzack, B. Schleich Methode zur Berücksichtigung geometrischer Abweichungen bei der Auslegung von Zylinderrollenlagern S. 117-132

„… importance in mechanical engineering due to their precise and low-friction guidance of rotating components at …” „… . 303-312. [15] Liqin, W.; Li, C.; Dehzi, Z.; Le, G.: Nonlinear Dynamics Behaviors of a Rotor Roller …”

doi.org/10.51202/9783181024157

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