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VDI Wissensforum GmbH (ed.)

Dritev 2022

Series: VDI-Berichte

Volume 2401 2022

Results in this title

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

„… Multiphase CFD investigation of splash lubrication Analysis of the lubricant flow behaviour and …” „… the churning loss under splash lubrication in a complex two-speed vehicle transmission, Computational …” „… rotating elements (small volume around gears) to create a realistic environment for the lubrication splash …”

J. Merckling Use of Power-Dense Fuel-Efficient Tapered Roller Bearings in E-Drives under Low-Viscosity Oil and High-Speed Conditions S. 153-168

„… lubrication systems for electric vehicle e-drive drivelines. Fig. 6: Timken rib speed guidelines VDI-Berichte …” „… to limit risk and avoid the rib scoring and cage damage modes: Lubrication and oil flow: In order to …” „… remove heat generated by the bearing and avoidmetal-to-metal contact, adequate lubrication systems and …”

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

„… the vibrations on the gearbox as well as the lubrication oil and bearing temperatures. As the …” „… bench module Lubrication Design Two circulating oil lubrication circuits, sharing one common tank, are …” „… used for the lubrication of the bearings and the gear meshes. Injection nozzles carry the oil flow (0.2 …”

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

„… ∙ ? (8) ???∑? ∙ ? , ∙ ? (9) ??? ,⇒ ? ,?? (10) VDI-Berichte Nr. 2401, 2022 81In case the lubrication …” „… ???. Lubrication to the synchronizer is usually provided through an oil shower with typical oil flows of around …” „… ? 2,5 ?/???. Of course, not only the lubrication amount but the temperature of the oil can be adjusted …”

T. Skubacz, C. Burkhardt, S. Krischke Proof of Concept: Bistable Shift Element S. 241-252

„… selected lubricant or the lubrication condition ("wet" to "dry"). For the test series, a modular system was …” „… different speeds or speed ramps and lubrication con-ditions (Fig. 12). This revealed effects over the speed …”

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

„… disconnect. Reduced losses by clutch disc separation and active lubrication enabling stopped E-motor …” „… valve, operated by the hydraulic pressure from the actuators, effectively reduces the lubrication flow …”

Titelei/Inhaltsverzeichnis S. I-X

„… of splash lubrication …”

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

„… . 2401, 20222lubrication. The EM also handles power generation for all vehicle systems, eliminating the …”

doi.org/10.51202/9783181024010

VDI Wissensforum GmbH - International Conference on Gears 2023

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VDI Wissensforum GmbH (ed.)

International Conference on Gears 2023

Series: VDI-Berichte

Volume 2422 2023

Results in this title

K. Suzuki, K. Sakai, K. Sakai, T. Hara Considerations on Lubrication of High-Speed Rotating Gear (First Report) S. 741-752

„… Considerations on Lubrication of High-Speed Rotating Gear (First Report) Relationship between the …” „… purpose is to discover new knowledge and optimize lubrication in future by correlating the observed …” „… lubrication of high-speed rotating gear, which is becoming increasingly necessary with the electrification of …”

L. Braumann, H. Amri, V. S. Viteri, J. Ochoa LUBGEAR – Experimental Campaign for Aviation Gears in Loss-of- Lubrication S. 1063-1070

„… LUBGEAR – Experimental Campaign for Aviation Gears in Loss-of-LubricationDipl.-Ing. L. Braumann, Dr …” „… Zertifizierungsprozesses auch unter Verlust der Schmierung (loss of lubrication, LOL) für einen definierten Zeitraum …” „… industry are required to withstand off-design conditions such as loss of lubrication (LOL) for a specified …”

B. Morhard, T. Lohner, K. Stahl Influence of Surface and Material Technologies on Loss of Lubrication Performance of Gears S. 779-784

„… 100Time t in s11.52 Injection lubricationLoss of lubricationOil = 90 °CLS9 (pH = 1723 N/mm2)vt = 8.3 …” „… Influence of Surface and Material Technologies on Loss of Lubrication Performance of Gears Bernd …” „… , GermanyZusammenfassung Getriebefans (Geared Turbofans) müssen Schmierstoffverlust (Loss of Lubrication) standhalten …”

F. Concli, M. N. Mastrone Latest advancements in the lubrication simulations of geared systems: a technology ready for industrial applications S. 499-518

„… Latest advancements in the lubrication simulations of geared systems: a technology ready for …” „… dissipation mechanism, ranging from the lubricant type (mineral oil, synthetic oil, grease) to the lubrication …” „… condition (dip lubrication, oil injection, spray etc.). Moreover, with the ”green tribology”, targeted to …”

M. Gebhardt, A. Rhode, B. Legrady Lubrication improvement at the HS-IS spline shaft interface of a wind turbine gearbox using the smooth particle hydrodynamic method S. 519-536

„… Lubrication improvement at the HS-IS spline shaft interface of a wind turbine gearbox using the …” „… Legrady, dive solutions GmbH, Berlin Abstract Sufficient lubrication between all contacting surfaces with …” „… insufficiently lubricated, wear is the result.This work exemplifies how to improve the lubrication in the spline …”

J. Hongu, S. Hattori, J. Kato, T. Koide Gear friction coefficient estimation using directional parameter under ATF lubricated condition S. 753-762

„… estimation equation has been applied to only the case under manual transmission fluid (MTF) lubrication …” „… tooth under a mixed-lubrication condition, and determine the important factor for the gear friction …” „… coefficient from the built friction model. Gear efficiency and its friction value under mixed lubrication have …”

U. Cihak-Bayr, T. Wopelka, C. Wintersteiger Effect of LOL conditions under high velocity and high injection temperatures S. 763-778

„… frictional behaviour in injection lubricated and loss of lubrication conditions in rolling-sliding contacts …” „… Sekundärschmiersystemen zur Folge haben, verschärft, denn daraus resultieren LOL-Bedingungen (Loss of Lubrication …” „… weight saving strategies eliminating optional secondary lubrication systems during negative g operations …”

S. Sartori, L. Alari, N. Motta, D. Podda Helicopter Drive System Safety Dissertation S. 633-644

„… lubrication, by improving the existing provisions and procedures applicable to critical parts on helicopters …” „… normative for civil helicopters, the failure of the lubrication system of a power transmission unit should …” „… accidents and incidents over the last 30 years concerning oil lubrication system failure. In order to …”

P. E. Schnetzer, J. Pellkofer, K. Stahl Calculation method for wear of steel-bronze rolling-sliding contacts relating to worm gears S. 907-926

„… rest rig under boundary and mixed lubrication to analyze the local coefficient of friction of a worm …” „… [16] and considering lubrication, a wear model for worm gears is presented by Jbily et al. [17]. The …” „… with injection lubrication at an oil volume flow of 1.4 /𝑚𝑖𝑛 at an oil injection temperature of 100 …”

E. Virtanen, M. Kanerva, G. Szanti Fatigue testing of large sized bevel gears S. 897-906

„… lubrication circuit, making the rig suitable also for testing and development of EAL lubricants. The test …” „… scuffing failures occurred. In order to reduce scuffing failures, the oil viscosity in the lubrication …” „… – for its performance – was tested on some gearsets. All these measures reduce the risk of lubrication …”

M. Hausmann, E. Kirchner Investigation of the electrical impedance of the gear mesh of helical gears in an industrial gearbox S. 1173-1180

„… condition-dependent electrical properties of machine elements. Previous electrical investigations of the lubrication …” „… dependent on various influencing factors, including geometry as well as lubrication and operating condition …” „… a sensory utilizable machine element is the sensing rolling element bearing where the lubrication …”

E. Grabovic, A. Artoni, M. Gabiccini, E. Ciulli Exploration of trade-offs between NVH and efficiency in bevel gear design S. 853-880

„… semi-empirical model to estimate frictional power losses under elasto-hydrodynamic lubrication is described. The …” „… . estimation of the elasto-hydrodynamic lubrication (EHL) friction coefficient; Numerous models and methods …” „… paper (Calyx, [3]). However, their EHL model did not account for mixed and boundary lubrication …”

C. Kunik, J. Kunert Wetting and oil flow analysis of planetary gearboxes using oil flow simulations S. 467-484

„… analyzing the fluid flow to ensure the lubrication of all components and increase the energy efficiency of a …” „… lubrication concept. The last investigation is the analysis of the pumping effect of the gearing into an oil …” „… lubrication behavior is very important to guarantee an optimally designed product. One approach to increase …”

M. Werner, S. Graf, M. Oehler, O. Koch Investigation of the electrical behavior of a spur gear stage pair by means of impedance measurements S. 67-80

„… occur on the raceway as a result of a spark in the lubrication gap (cf. Fig. 1 a). In addition to this …” „… tribological states of boundary friction, mixed friction and full lubrication. According to the current state …” „… ) the rolling VDI-Berichte Nr. 2422, 202370contact is in full lubrication (cf. Fig. 3 a). When the phase …”

J. Zhang, B. Shaw, A. Hammer, I. Sewell Effects of Surface Engineering on the Efficiency of Involute Helical Gears – An Experimental Investigation S. 995-1016

„… real gear meshes when running at no load, EHD and boundary lubrication conditions. The authors also …” „… in the drop of temperature of lubrication oil and may lead to the reduction in weight and size of …” „… auxiliary lubrication systems attached to gear transmission units. Thus, findings of this research may be of …”

W. Ramdane, C. Changenet, S. S. Ouali, C. Chevrel-Fraux, P. Casanova Thermal model of a planetary gear set using an isothermal approach S. 451-466

„… lubrication, planetary gear trainIntroductionPredicting the temperature evolution of geared system makes the …” „… depend on oil characteristics, and the associated lubrication (injection or splash lubrication) As far as …” „… gear train is enclosed in a cylindrical housing, and a splash lubrication system is used with an oil …”

A. Drechsel, J. Pellkofer, K. Stahl Transferability of the scuffing load capacity of gear oils determined on spur gears to hypoid gears S. 881-896

„… lubrication as well as a combination of both types of lubrication. The oil temperature in the gearboxes can be …” „… escalate freely. Dip lubrication with an immersion depth of 0.14 in relation to the outer pitch diameter of …” „… the wheel is applied as lubrication type. Local maximum sliding velocities about 12.1 m/s or sliding …”

M. Yilmaz, M. Ayar, F. Zerulli, K. Humm, J. König, B. Schwarz Gearbox efficiency of eDrives: correlation between measurement and calculation of load-dependent torque losses S. 985-994

„… lubrication is used and the oil injection temperature is varied between 40, 60 and 80°C. Eingangswelle …” „… , coast side Lubrication Injection lubrication Table 2: Properties of the investigated eDrive lubricant ν …” „… Munich (2020). (7) Yilmaz, M.: Getriebeschmierung mit wasserhaltigen Polyglykolen [Gearbox lubrication …”

M. Reichl, P. Lenz, A. Oliva Challenges and possibilities of virtual development of e-axle transmissions S. 485-498

„… on the transmission and the related cooling and lubrication system. In addition, cost pressure is …” „… essential during the development process to get a deep understanding of the lubrication system.In this paper …” „… purpose of these simulations, in addition to ensuring adequate cooling and lubrication, is to determine …”

Titelei/Inhaltsverzeichnis S. I-XXVIII

„… University of Athens, Athens, Greece Planetary gears: Simulation and lubricationSimulation Study on the …” „… Research Laboratory,The Ohio State University, Columbus, USA LubricationLubricant Free Transmissions for …” „… , AustriaLatest advancements in the lubrication simulations of geared systems: a technology ready for industrial …”

S. Matkovič, D. Šeruga, M. Nagode, M. Kalin Prediction of tooth root fatigue failure of polymer gears for dry and oil lubricated contact and its comparison to experimentally obtained results S. 1301-1318

„… operate without lubrication, and design flexibility [1]. However, due to the lower mechanical performance …” „… conditions (temperature, humidity, lubrication). Since the polymers are highly temperature-dependent the root …” „… tests conducted at 0.8 Nm to those at the highest torque (1.2 Nm), gears operating without lubrication …”

Foreword S. 1-2

„… points of view, like gear design or lubrication. Other subjects of the conferences are Responsible …”

A. F. İnceel, B. Özkan, B. Karba, M. Vardar A study on the efficiency prediction of a gear bearing drive by means of mathematical modelling S. 1135-1146

„… between them, mesh loss factors, power flow summary, bearing size, lubrication properties are described in …” „… & Lubrication properties Results & Comparisons Hexagon Romax has many power loss calculation methods mentioned …” „… improve by using virtual power balance methodologies. - Grease lubrication will be analyzed to understand …”

M. Geitner, S. Preintner, T. Tobie, K. Stahl Simulation Study on the Tribological Characteristics in the Meshing Contact in the Context of the Load Carrying Capacity Calculation of Internal Gears with Unbalanced Sliding Conditions S. 429-450

„… ) with injection lubrication at = 60 °C. The specific lubricant data (incl. empiric factors for …” „… hydrodynamic pressure curve (red) and the temperature distribution (blue) occurring in the lubrication gap are …” „… therefore, no mixed lubrication is considered. As input parameters serve the pressure and the speed …”

A. Wallinger, R. Vonderschmidt, S. Vonderschmidt Lubricant Free Transmissions for the food industry – A Comparison S. 715-726

„… components often require lubrication. One route of entry into the food can be damaged seals in the drives …” „… not require gear lubrication. Fig. 2: Design and advantages of a magnetic transmission Gear units …” „… lubrication of the tooth flanks. Figure 3 shows the design of a planetary gear unit with plastic gears. Radial …”

S. Ebrahimi, U. Kissling, C. S. Matkovič Evaluation of the NVH Characteristics of Gear Drives with Plastic Gears by the Forced Response Analysis S. 1403-1418

„… time-varying damping. In this context, a non-linear damping model with backlash and under no lubrication …” „… transient gear elastohydrodynamic lubrication model and a torsional dynamic model. A simplified expression …” „… . In addition, the various damping mechanisms in elastohydrodynamic lubrication contacts were …”

J. Cathelin Plastic Gears: Investigation on Noise and NVH Behavior S. 1449-1460

„… friction on NVH behaviour. Similar gear pairs could be tested without internal lubrication and with an …” „… external grease lubrication to quantify the influence of the coefficient of friction on the noise …”

A. Beinstingel, F. Haringer, W. Sigmund, M. Heider, B. Pinnekamp, S. Marburg Investigation of Sound and Vibration Behavior of Cylindrical Gears S. 599-618

„… terms of lubrication theory [21]. The numerical solution of the associated Reynold’s equation is carried …” „… lubrication model for helical gear contacts, Journal of Tribology 143 (6) (2021), p. 15 [9] Guo, Y., Eritenel …” „… .: On the theory of lubrication and its application to Mr. Beauchamp Tower’s experiments including an …”

S. Sklenak, D. Mevissen, J. Brimmers, C. Brecher, B. Lenz, A. Mehner Analysis of Load Cycles and Local Wear of Dry and Solid-Lubricated Gears S. 727-740

„… compared to liquid lubrication, the operating behavior in terms of efficiency for dry and solid lubricated …” „… .: Coating failureLubrication– Dry– PVD-Coating system 10100Log. Torque at pinion M1/ NmSubstrateTiCNMoS2:Ti …” „… ., 2005,“Development of Power-train and Drive Line Components without Liquid Lubrication …”

J. Vorgerd, P. Tenberge, M. Steinrötter Scuffing load carrying capacity of high-speed gears with an isotropic superfinished surface S. 227-242

„… of dip lubrication, a temperature-controlled oil injection was used. For constant speed and oil …” „… . Lubrication (1937) [COLL91] Collenberg, H. F.: Untersuchungen zur Fresstragfähigkeit schnelllaufender …”

T. König, L. Cadau, L. Steidle, M. Kley, D. Cansu Güney, J. Albrecht, K. Weber A concept for comparison of new and aged lubricants in transmissions of electric vehicles and a method of oil aging on a test rig S. 1195-1206

„… , coefficient of friction, wear and lubrication requirements [5]. To determine the coefficient of friction 𝜇 of …” „… of friction of the order of µ 0.15 are found that are typical for a state of mixed lubrication. Here …”

M. Rothemund, M. Otto, K. Stahl Applicability of classic analytical calculation approaches for the design of plastic gears S. 1483-1498

„… their low cost, low noise excitation, and the possibility of lubrication-free use. In addition, plastic …” „… ]. The flank load capacity is particularly dependent on the selected plastic but also on the lubrication …”

B. Černe, N. Vukašinović, D. Zorko In-situ experimental methods for measuring tooth meshing displacements and wear during polymer gear tests using a high-speed camera with microscopy optics S. 1563-1580

„… , lubrication, load conditions, etc.) Each recording must contain a full gear rotation in order to be able to …” „… , Identification of failure modes of a PEEK-steel gear pair under lubrication, International Journal of Fatigue …”

I. Gonzalez-Perez, A. Fuentes-Aznar Improvement of the transmission efficiency in electric vehicles by using double staggered helical gears with shortened teeth S. 1083-1090

„… using a thermal elastohydrodynamic simulation including mixed lubrication. Lubricants 10, 2022. [5] H …”

K. Yanagisawa, K. Kamoshida, A. Domon Prediction of Gear Fatigue Life Considering Glass Fiber Orientation S. 1351-1360

„… test conditions are as follows Lubrication : none Rotation speed of metal gear : 1500rpm Load : 0.5Nm …”

R. Beilicke, D. Bartel, L. Bobach Simulation-based optimization of gearing efficiency using thin coatings S. 975-984

„… thus support a removal of heat in the lubrication gap only to a small extent. The smaller the values of …”

B.-S. Kim, D. Im, J.-H. Park, W.-J. Chung, Y.-J. Park Development of Optimal Design Program for Macro-Geometry of Planetary Gear Set using Multi-Objective Optimization Algorithm S. 1181-1194

„… Association (AGMA). AGMA 925: Effect of Tribology and Lubrication on Gear Surface Distress. AGMA (2022 …”

N. Blech, C. Paschold, T. Lohner, T. Tobie, K. Stahl, L. Amar Review of different calculation approaches for the mean coefficient of friction in ISO 6336 S. 191-210

„… advantageous lubrication due to a higher sum velocity in the gear mesh. A higher lubricating film thickness …” „… Actual Contact Under Oiliness Lubricating Condition. Proc. General Disc. Lubrication (1937) 12, S …”

L. Amar Review of the definition of the loads for spur and helical gears in standards and handbooks S. 301-314

„… , Helical and Herringbone Gear Teeth [13] AGMA 925-A03 Information Sheet - Effect of Lubrication on Gear …”

L. Bonaiti, M. Brambilla, P. Chiariotti, A. Cigada, C. Gorla, G. Boni, P. Codeluppi The effect of pinion axial positioning on noise and transmission error of face hobbed and face milled bevel gears S. 839-852

„… fast assembly/disassembly of the gear set and to enable splash lubrication. The gearbox is made of …”

O. Harris, C. Poyser, R. Patel, O. Shires Developing CAE solutions for Robotics gears: Cycloidal and Strain Wave Gear Drives S. 1111-1124

„… actual manufactured drivetrain. To allow for assembly and lubrication of a cycloidal drive it is …”

N. Missal, S. Schwertel, M. Ludwig The next level of axial forming for a sustainable component and process chain design S. 1765-1776

„… typical lubrication film breakage for the cold metal forming process caused by the high contact stresses …”

T. Tra My Truong, S. Schumann, B. Schlecht On the Testing of Flank Fracture Calculations Based on 3D-Gears S. 243-256

„… conditions, such as torque, case hardening depth ( ) and lubrication. This paper therefore investigates …”

C. Herzog, D. Drummer Influence of the injection molding process on the tooth deflection of plastic gears during operation S. 1435-1448

„… different correction factors for temperature, lubrication and humidity for example. In addition, the lack of …”

P. Chavan, M. Lutz Validation of an industrial gearbox model for predicting vibro-acoustic behavior S. 619-632

„… effect of the lubrication oil volume inside the gear unit. Ignoring the damping effect of the oil volume …”

G. Guimarães, L. Robatto, R. Rego, A. Faria, A. Borille, J. Mascheroni Surface integrity of 20MnCr5 pinion gears manufactured through laser powder bed fusion S. 1845-1858

„… batches or gears with unique requirements such as lightweight, internal cooling, or lubrication. Although …”

L. Becker, P. Tenberge Crossed helical gears – simulative studies and experimental results on non-involute geometries S. 1499-1514

„… plastic wheels and the deviation of an oil and grease lubrication, the differences in contact behavior of …”

F. Mieth, D. Tazir Local load capacity analysis for the design of a balanced flank modification for cylindrical gears according to bevel gear procedures S. 927-944

„… be determined more precisely with local consideration of stresses, lubrication coefficients such as …”

S. Chen, C. Liu, D. Qin Forward Performance-driven Design of Gear Parameters S. 211-226

„… , 1978,100(3):353. [14] Townsend D P. Lubrication and cooling for high speed gears[R].1985. [15] SKF General …”

P. Romio Spur Gear Teeth Reconstruction via Direct Laser Deposition S. 1641-1664

„… 150 gear oil at 80ºC under dip lubrication in the whole set of tests. The lubricant’s physical …”

doi.org/10.51202/9783181024225

VDI Wissensforum GmbH - International Conference on Gears 2019

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VDI Wissensforum GmbH (ed.)

International Conference on Gears 2019

Series: VDI-Berichte

Volume 2355 2019

Results in this title

Z. H. Wu, Y. Q. Xu, K. A. Liu The Analysis on Grease Lubrication at Two Tapered Bodies Contact Considering Surface Roughness S. 1223-1236

„… The Analysis on Grease Lubrication at Two Tapered Bodies Contact Considering Surface Roughness …” „… feature of tapered body and non-Newtonian characters of grease, fresh grease lubrication problem at two …” „… tapered bodies contact in the initial lubrication stage was analyzed, and effects of profile crowning …”

B. J . Siewerin, T. Tobie, K. Stahl, A. Dobler Flank load carrying capacity of hard-soft gear pairings S. 173-184

„… gear pairings, grease lubrication, sliding wear, pitting strength 1. Introduction Large open gear …” „… about the load capacity of such transmissions under the specific lubrication conditions. The pitting …” „… general, is a damage due to material fatigue, the lubrication conditions, too, have a major influence …”

E. Maier, T. Lohner, K. Stahl, P. Sperka, M. Hartl Detailed analyses of film thickness and friction in thermoplastic EHL contacts S. 1391-1400

„… gears, fluid lubrication is required for effective heat removal and prevention from wear. The …” „… could be present even at fluid film lubrication. The elastic deformation of the thermoplastic surface …” „… lubrication, low material stiffness results in large contact radii such that external load can spread over a …”

H.-J. Dennig, S. Winterberg Test stand for internally cooled metal gears S. 1263-1266

„… efficient. Smaller mass moments of inertia and optimized design for cooling, lubrication and tooth meshing …” „… amount of required lubrication and thus the ventilation and splashing losses. Fig. 1: SLM Gear with …” „… lubrication improves the service life and increases the efficiency of the gearing. Due to the lubricating …”

D. Mevissen, C. Lopenhaus, T. Bergs Calculation of mixed friction conditions in large-scale rolling-sliding contacts for different surface structures S. 555-568

„… calculation method for mixed lubrication conditions. Besides a detailed verification of the calculation …” „… tribological systems depends mainly on the lubrication conditions during operation. The tribological system of …” „… two contacting tooth flanks is operated in mixed lubrication conditions for many applications [1, 2 …”

H.-J. Dennig, S. Monn, A. Vodermayer Thermoplastic high performance composite gears S. 1279-1290

„… modes of plastic gears, materials, lubrication and manufacturing. Currently, the damage to plastic …” „… lubrication running, due to the better heat dissipation of the steel gear . Heym detected more pitting in …” „… component, they also increase wear. A single application of grease lubrication increases the life time …”

K. Takaki, M. Sugimoto Optimization of hypoid gear macro/micro geometries for high efficiency drives, taking into consideration NVH and strength S. 367-378

„… coefficient is then estimated, taking into account the mixed lubrication condition. VDI-Berichte Nr. 2355 …” „… meshing point along the path of contact. The mesh contact area is in a mixed lubrication state where the …” „… load-bearing area under fluid film lubrication, fs is the friction coefficient of the area under boundary …”

F. Siglmuller, U. Weinberger, J. Gotz, M. Sedlmair, T. Lohner, K. Stahl Scaling of planetary gear stages according to gear loss similarity S. 115-126

„… ]. It is a simple applicable and common non-dimensional factor to distinguish between the lubrication …” „… regimes boundary lubrication (λrel < 0.7), mixed lubrication (0.7 < λrel < 2.0) and fluid film …” „… lubrication (λrel > 2.0) [6]. During the scaling approach it is important to ensure a similar lubrication …”

M. Yilmaz, T. Lohner, K. Michaelis, K. Stahl Minimizing gear friction with water-containing gear fluids S. 669-680

„… were conducted under dip lubrication with an oil filling level of 76 mm (20 mm below the gear axes) at …” „… ) was investigated at KS7 for all pitch line velocities. The lubrication regimes extended from boundary …” „… to mixed and fluid film lubrication. Each operating condition was hold for 5 min to allow …”

I. Bae, U. Kissling Comparison of strength ratings of plastic gears by VDI 2736 and JIS B 1759 – In vision of building a new international standard S. 1267-1278

„… in terms of weight, noise, vibration, lubrication, and in design and production when it is injection …” „… mm, 1000 rpm, 1. Lubrication factor Not applied 1 for standard test condition without …” „… lubrication. Otherwise, 1. Material factor Not applied If mating gear is steel, 1. If mating gear is …”

F. Concli, L. Maccioni, C. Gorla Power loss analysis of different high-power density gearbox typologies: CFD analysis and experimental measurements on a cycloidal gear set S. 101-114

„… problems ensuring proper lubrication and increasing the reliability of the systems. High power density …” „… lubrication, churning, windage and squeezing). Some examples of numerical multiphase CFD and experimental …” „… needed in order to compensate the manufacturing errors and to guarantee better lubrication and mounting …”

M. R. Mauntz, J. Peuser Deep online oil analysis of dielectric parameters for life time enhancement of industrial gearboxes – Identification of critical operation conditions for reduction of failure rates S. 245-256

„… long term time scale, the critical lubrication conditions – occurring only in operation – are in the …” „… kind of events. Additive Consumption: The additive consumption in lubrication oil has a higher …” „… lubrication film / tribological layer protection is prevented. r is decreasing a bit. After the additives …”

B. Hu, M. Zheng, C. Zhou Tribo-dynamics model of a spur gear pair with gyroscopic effect and flexible shaft S. 541-554

„… spur gear by coupling an elastic dynamic model and an elastohydrodynamic lubrication (EHL) model. In …” „… important guidance for the design of lubrication systems and dynamic properties in gear drives. Keywords …” „… : Gear drives; Tribo-dynamics; Elastohydrodynamic lubrication; Gyroscopic effect; Flexible shaft 1 …”

S. Bill Life extension for gearboxes through predictive maintenance S. 1259-1262

„… prevent it or prevent it to a minimum, because of the very poor lubrication due to lack of movement in …” „… it, even if the lubrication is deficient. We have scientifically analyzed the behavior of …”

Y. Omiya, M. Fujii, H. Sekishita, K. Ishimoto, A. Ueda Effect of surface characterization induced by fine shot peening on scuffing of steel roller S. 37-46

„… will be found to increase the lubrication property, the metal surface will be obtained with both the …” „… depth of 500μm or less effectively promoted the formation of the oil film, and lubrication condition …” „… fine shot peening with dimples that improves lubrication performance on the contact surface with a …”

A. Miltenović, M. Banić, V. Miltenović Prediction of heat generation of crossed axis gearbox S. 583-594

„… Elastohydrodynamic Lubrication theory to Thermo Elastohydrohynamic Lubricatrion or TEHL by including temperature rise …” „… gear pair, gearbox, bearings, wheel shaft, lubrication and air. VDI-Berichte Nr. 2355, 2019 587 …” „… ., Flynn P., Theory of lubrication and failure of rolling contacts, J. Basic Eng. 1961, 83 (2), 213–222 …”

E. Bergstedt, U. Olofsson, J. Lin, P. Lindholm Influence of gear surface roughness on pitting and micropitting life S. 3-14

„… the calculated specific film thickness a transition from elastohydrodynamic lubrication (EHL) to …” „… mixed lubrication is expected at LS 8 and LS 10, for the ground and super finished gears respectively …” „… specific film thickness is sufficient to altogether inhibit surface wear by promoting EHL lubrication. It …”

S. Vonderschmidt, A. Ott, A. Vonderschmidt High speed driven tool for machine tools using magnetic transmission technology S. 1145-1154

„… industry because of their lack of lubricants [1]. Without lubrication the contamination of foods can be …” „… . Beside the advantages of lacking lubrication magnetic transmission are, due to the contactless torque …” „… lubrication. Also due to the high efficiency of magnetic transmissions very high speeds are possible. The …”

R. Beilicke, L. Bobach, D. Bartel Transient 3D TEHL simulation of spiral bevel gears under mixed friction conditions S. 529-540

„… thermophysical lubricant properties are mapped in all three spatial directions of the lubrication gap depending …” „… lubrication gap and in the adjacent teeth of the tooth flank contact is based on the coupled transient …” „… direction, the number of nodes was evenly split between the lubrication gap and both solid bodies. The …”

B. Karpuschewski, D. Sackmann, M. Kochig, M. Beutner, F. Welzel Potentials and limits of gear hobbing with cooling lubricants S. 1591-1602

„… thickness of 0.20 mm. It is noticeable that dry cutting without lubrication lead to very large tool life …” „… . VDI-Berichte Nr. 2355, 20191596 Fig. 6: Tool life depending on lubrication and cutting speed – hcu,max = 0.20 …” „… . 2355, 2019 1597 Fig. 8: Tool life depending on lubrication and cutting speed – hcu,max = 0.24 mm …”

C. Hegger, T. Kruger, J. Maas Two-speed transmission based on energy-efficient MRF-coupling elements and power split mechanism S. 867-876

„… housing to avoid contact with the applied oil for lubrication of the gears. The number of applied …” „… ferromagnetic materials the MRF-based coupling elements must be separated from the lubrication of the gears. In …” „… gears can be also separately investigated. The lubrication is based on an oil sump providing a …”

D. Kurten, A. Kailer Hydrogen embrittlement of oil lubricated contacts S. 681-688

„… (MAC fluid) from Nye Lubrication with a viscosity of 108 cSt (40°C) and (ii) perfluoro-poly-ether …” „… (PFPE) from Klüber Lubrication with a viscosity of 100 cSt (40°C). The MAC fluid is a 1,2,4-Tris (2 …”

M. Uhlig, C. Pastor Simulation tool-chain for plastic gear design S. 1453-1460

„… prediction at teeth is expected, especially with respect to friction, lubrication, temperature and tooth …” „… Point Contacts in Mixed Lubrication Regime. 26th Leeds-Lyon Symposium on Tribology, Tribology Series 38 …”

K. Stahl Foreword S. 1-2

„… the application of tailored synthetic or even water based lubrication fluids are typical. Several …”

R. Saito, K. Matsuo, Y. Suzuki Noise characteristics induced by micropitting formed on particle-based parkerized gears S. 69-78

„… the boundary lubrication region where oil film formation is impeded. Pitting and micropitting occur …” „… under low to medium loads in the mixed lubrication region. The way vehicles are driven in the real …”

J. Lotz, B. Bouche, R. Thiele Sensorless evaluation of the ideal timing for oil-change S. 1053-1064

„… machine element in gears. The gear oil is used both for the lubrication of moving components and for heat …” „… References [1] Klüber Lubrication München SE & CO. KG – Brochure „Geared up for success”, München, 2015 [2 …”

J. Pellkofer, M. Hein, K. Stahl, T. Reimann, M. Hombauer New calculation method of the micropitting load carrying capacity of bevel and hypoid gears S. 517-528

„… tribological system consisting of lubrication (base oil and additives) and tooth flank condition (roughness …” „… lubrication. Tribologie und Schmierungstechnik, Volume 59, P. 8-14 (2012). [6] Hombauer, M.: Grauflecken an …” „… contact tribological layers. Lubrication Science, Vol. 19, P. 57-70 (2007). VDI-Berichte Nr. 2355 …”

F. Eigner, R. Michel, M. Berger Analysis on the efficiency of HypoGear S. 127-136

„… , concentricity of all shafts, lubrication and the brake. VDI-Berichte Nr. 2355, 2019 131 Figure 5: Efficiency …” „… . Another point is lubrication, which is achieved with a special high-viscosity hypoid oil. If the torque …”

D. Park, F. Santini, A. Rezayat, T. Tamarozzi, J. Pavel Experimental and numerical investigation of helical gear transmission error under gear misalignments S. 355-366

„… , lubrication effect on contacting interface, etc. The combination of these factors ultimately could result in …” „… higher gear contact friction at this low speed of revolution tested, where Elastohydrodynamic Lubrication …”

J. Tavčar, J. Kos, D. Zorko, J. Duhovnik A multi-criteria polymer gears design optimisation procedure S. 1473-1484

„… Corrective measure: gear size, lubrication (external, internal), materail pair (coeff. of friction) Criteria …” „… , housing design, lubrication z1 = z1min z2 = u ∙ z1 z1 <= z1max END NO YES z2 <= z2max z1 = z1 + 1 NO YES Tooth standard …”

Titelei/Inhaltsverzeichnis S. I-XXVI

„… GmbH, Magdeburg; L. Bobach, D. Bartel, Otto von Guericke University, Magdeburg f Lubrication, EHL …” „… A. D. Rauch, C. Wirth, MAHLE ZG Transmissions, Eching f Lubrication, flank strength Determination …” „… Transmission, Chongqing University, China The Analysis on Grease Lubrication at Two Tapered Bodies Contact …”

C. Liu, W. Shi, F. Maria Cura, A. Mura Prediction of transmission accuracy lifetime of RV gearbox S. 425-436

„… on the lubrication condition. Although many works in the past have been published about the …” „… ] Bo, W., Jiaxu, W., Guangwu, Z., Rongsong, Y., Hongjun, Z., Tao, H.: Mixed Lubrication Analysis of …”

J. Zhang, J. Wang Dynamic modeling and analysis of a star-wheel reducer S. 741-752

„… ] investigated the load sharing, the tooth contact and the lubrication performance of planetary drives with small …” „… difference considering real tooth geometry[J]. Lubrication Science, 2018, 30(6): 317- 330. [11]. Li S …”

J. Hongu, H. Noborio, T. Koide, A. Tamura Proposal of linear mapping model among machining processes for gear tooth surface using graphic analysis S. 1199-1206

„… Surface under Mixed Lubrication Condition, JAST, Vol.5, No.10, p.632-638 2011 (in Japanese) [3] ISO 4287 …”

L. Stocco Complementary strengths of orbitless & planetary drives S. 1485-1496

„… , high-resolution plastic planets, and a light coating of WD40 for lubrication. Both gear-motors are connected by …”

K. Daubach, Manuel Oehler, Bernd Sauer A method to determine local wear of worm gears with highly resolved circumferential backlash curves S. 595-606

„… polyglycol based oil (ISO VG 220) with practical relevance for worm gears was used for lubrication. The …”

J. Cathelin Material data for advanced plastic gear simulation S. 1335-1344

„… , lubrication mode and contact pressure range. a. b. Fig. 8: Dry running LubricompTM KA000M (POM …”

C. Boehme, D. Vill, P. Tenberge Extension of the application limits for crossed helical gearboxes by new geometries for smaller sliding paths or smaller contact pressures S. 1299-1310

„… paths, the lubrication condition, the tooth stiffness and, to a limited extent, on the efficiency of …”

K. Smrczkova Wear resistant plastics – Bespoke plastic compounds for plastic gears S. 1345-1356

„… increased friction if not lubricated or modified. In many fields of applications an external lubrication …”

C. M. Illenberger, T. Tobie, K. Stahl Flank load carrying capacity of oil-lubricated high performance plastic gears – Analysis of the pitting development in back-to-back tests S. 1379-1390

„… . Proceedings of the General Discussion on Lubrication and Lubricants (1937). [5] Evonik Industries: Product …”

S. Yokoyama A study of gear oil performances contributing to wind turbine lifetime extensions S. 845-856

„… rolling-sliding contact surface under mixed lubrication condition, Journal of Japanese Society of …”

P. Barreiro, J. Hoffmeister, J. Hermes, A. Bronner New improvement opportunities through applying topology optimization combined with 3D printing to the construction of gearbox housings S. 1823-1834

„… . Due to the active lubrication and the close outline of the housing, it is possible save around three …”

F. Rudolph, S. Schumann, B. Schlecht Consideration of solid particles in a gear lapping simulation S. 1675-1686

„… lubrication, it has proven very useful in predicting abrasive wear caused by hard particles or asperities …”

K. Mukaiyama, M. Nakagawa, T. Hirogaki, E. Aoyama Investigation of meshing phenomenon of hypoid gears with different offsets via high response infrared video thermography S. 505-516

„… combines a computationally efficient contact model and a mixed Elasto-Hydrodynamic-Lubrication (EHL) based …”

A. Pogačnik, U. Kissling Layout of profile modifications for symmetric and asymmetric plastic gears S. 1461-1472

„… offer other advantages, like lower masses, good dampening properties, lubrication free operation and …”

doi.org/10.51202/9783181023556

VDI Wissensforum GmbH - Dritev – Drivetrain For Vehicles 2019

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VDI Wissensforum GmbH (ed.)

Dritev – Drivetrain For Vehicles 2019

Series: VDI-Berichte

Volume 2354 2019

Results in this title

R. Gat, M. Ehlen Virtual lubrication analysis – Simulation of oil flow in gearboxes using a novel lagrangian approach S. I-133-I-136

„… Virtual Lubrication Analysis – Simulation of Oil Flow in Gearboxes using a novel Lagrangian …” „… implicit Lagrangian Approach • Lubrication Analysis – Industrial Examples • Current R&D Activities …” „… different areas. In modern transmission development one major task is to ensure lubrication and cooling of …”

O. Simon, W. Heubner Triple wet clutch module and actuation system, shift cylinders and park lock for modern hybrid transmissions – Architecture and technical description of a triple wet clutch unit and the related active... S. I-471-I-482

„… with an own oil reservoir allows lifetime filling and free choice of the lubrication oil …” „… efficient system to separate high pressure supply for actuation from low pressure for lubrication and …” „… separated by check-valves. Active lubrication and dedicated cooling of the clutch pack by a separate …”

S. Stöhr, R. Koesling, V. Marx New all-wheel drive systems in Mercedes-Benz SUVs S. I-483-I-500

„… Torque distribution: 50% / 50% by means of open differential Weight: 20.9 kg Lubrication concept …” „… : passive lubrication, oil supplied to the components around the main shaft via the chain with oil capacity …” „… distribution: variable Clutch torque: 1600 Nm nominal value Weight: 23.7 kg Lubrication concept …”

H. Göbbels, S. Scholz, S. Volkmer Efficient 6-speed manual transmission for modern downspeeding solutions S. I-411-I-426

„… New lubrication strategy Synchronizer design Large ratio spread for: Good starting …” „… Transmission fluid simulation In order to ensure the uniform and optimum lubrication of all relevant …” „… the 6th gear The inner transmission lubrication The simulation focused particularly on …”

A. Harsch, G. Clausen, A. Rink Modular system 8G-DCT with all-wheel drive S. I-79-I-94

„… power head 8. Oil system / dry sump lubrication A dry sump lubrication system has been used in the …” „… other hand all cooling and lubrication requirements are also taken care of. Due to the presence of a …” „… dry sump lubrication system, active lubrication is necessary to cool the gear meshing zones. The oil …”

A. Moser, F. Brezger Efficiency improvements in transmissions using new latching technologies in clutch & hydraulic actuation systems S. I-427-I-446

„… the actuators for gear shifts itself. The lubrication of gears and bearings as well as cooling for …” „… present, too. The friction losses are not only geometry and lubrication dependent but also force and speed …” „… to 3 bar which is, in any case, necessary for lubrication. This equates to about 1.75 gCO2/km in a …”

T. Pullen Integrated eDrive system for various performance classes S. I-287-I-294

„… or active lubrication of the transmission can be implemented depending on the thermal and efficiency …” „… for active and optimized passive gearbox lubrication – Source GKN VDI-Berichte Nr …” „… lubrication improving efficiency. The replaceable input pinion with pilot bearing arrangement enables the …”

M. Bahne, A. Wiesebrock Flexible oil management for dual-clutch transmissions S. I-447-I-454

„… lubrication oil management by Magna Powertrain and BMW is created for automatically shifted transmissions. It …” „… lubrication as life-time operation. In automatic transmissions, life-time oil filling would increase weight …” „… flexible oil management is to know the lubrication oil condition as precisely as possible. Such a …”

P. Fietkau, N. Lamparsky, M. Felbermaier, A. Fröhlcke, T. Conze Holistic design approach for electric drives S. I-163-I-178

„… supplies conclusive information on the occurring forces, service strength and acoustics. In the Lubrication …” „… , Thermal and Actuation DPSs, all temperatures are determined and the lubrication circuit is designed. The …” „… correction before welding. 6. Cooling DPS, Lubrication DPS and Actuation DPS In the Thermal & Cooling …”

H. Gürbüz, S. Ott, A. Albers Potentials for improving the system behaviour of highspeed clutches for BEV using optimal transmission springs S. I-265-I-278

„… concepts is always limited by tribological challenges [6]. In addition to the requirements for lubrication …” „… , special sliding coatings from Miba are used. Optimum lubrication for high sliding speeds and surface …” „… piston in order VDI-Berichte Nr. 2354, 2019276 to achieve optimum lubrication in the sliding contact. In …”

A. Grunwald Transmission system footprint related to fatigue, efficiency and NVH S. I-367-I-384

„… is very demanding. Typically, the gearbox lubrication and cooling is achieved without an additional …” „… oil pump by using splash lubrication in combination with clever oil guidance and reservoir. Various …” „… splash losses and enable sufficient lubrication with heat transfer through the transmission system. Low …”

D. Schweigert, M. Mileti, B. Morhard, M. Sedlmair, M. Fromberger, M. Otto, T. Lohner, K. Stahl Innovative transmission concept for hyper-high-speed electromechanical powertrains S. I-541-I-554

„… holistic thermal management coupled with innovative lubrication concepts. Indeed, by creating one circuit …” „… for cooling and lubrication the warmth generated by the losses of power electronics and electric …” „… points under injection lubrication conditions and the bearing preload of ST1. The only differences are …”

Titelei/Inhaltsverzeichnis S. I-I-I-XII

„… Virtual lubrication analysis – Simulation of oil flow in gearboxes using a novel lagrangian approach …”

C. Leonhardt, M. Otto, K. Stahl Potential of lightweight construction and component properties of joined spur gears S. I-179-I-196

„… lubrication is provided by an external oil VDI-Berichte Nr. 2354, 2019 187 supply unit with temperature …” „… control. The test run is conducted with oil injection lubrication at 60 °C. The rotational speed was 2000 …” „… ; NUMIFORM 2016, Troyes Frankreich [13] Meissner, R.; Liewald, M.: Influence of lubrication on manufacturing …”

C. Kim New next generation eight-speed automatic transmission for FWD vehicles S. I-397-I-410

„… lubrication. The valve body is also configured in the same layout and designed to cope with electrification …”

Y. Le Neindre Great Wall Motors’ 2nd generation of Pi4 platform – A high performance PHEV for premium SUV in China S. II-99-II-110

„… developed for this project an electric oil pump (EOP) to supply oil for lubrication, actuation …”

K. Hasegawa, D. Kosaka, S. Shimizu, K. Kawabata, H. Tsukashima Development of new hybrid AWD system for the SUV segment S. I-501-I-514

„… transmission fluid (ATF) for lubrication, which is also used for motor cooling.To accomplish the performance …”

S. Johnsen, R. Wexenberger Mechatronic transmission control module for agile AMT Transmission actuation in commercial vehicles S. III-75-III-84

„… . 2. Figure 3 Friction properties of lead screw nuts with various materials and lubrications …”

P. Lück, K. Bennewitz, J. Tousen Volkswagen’s electric drivetrains of the new modular e-drive kit (MEB) S. I-515-I-530

„… components is provided by a lifetime oil filling. The oil is guided specifically to the lubrication points …”

A. Kinigadner, T. Biermann Schaeffler eAxle family – future solutions for the electric drivetrain S. I-567-II-VIII

„… gear set lubrication. Electric machine speed reaches up to 12,000 rpm and 270 Nm torque at the …”

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 S. I-227-I-254

„… . Permanent lubrication can also be achieved by a forced supply of lubricant, for example via an additional …”

doi.org/10.51202/9783181023549

VDI Wissensforum GmbH - Drivetrain for Vehicles 2017

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VDI Wissensforum GmbH (ed.)

Drivetrain for Vehicles 2017

Series: VDI-Berichte

Volume 2313 2017

Results in this title

I. Greifer, W. Leska Reducing CO2 emissions by way of injection lubrication on manual gearboxes MLxx2 S. 67-68

„… Reducing C02 emissions by way of injection lubrication on manual gearboxes MLxx2 Dr. rer …” „… employed immersion lubrication. To further reduce C02 emissions, we developed an injection lubrication …” „… actual injection lubrication, which is the primary subject of this article, reduced C02 emissions in the …”

R. Tull de Salis, J. Farssell, T. Stalfors A48-400V Ofi-Axis P2 hybrid module with minimal Impact on powertrain length -Joint development between Volvo cars and BorgWamer S. 25-26

„… battery, high speed chain drive, torsional damping, actuation, control strategies, lubrication and …”

K. Kato, Y. Suzuki, A. Nishimine, S. Suenaga, K. Shimayabu, M. Tsuchida, S. Baba, T. Miyazaki Development of new plug-in hybrid transaxle for compact-class vehicles-Dual motor drive system S. 45-46

„… developed and a part of lubrication system has been modified. The new Toyota plug-in hybrid vehicle(PHV …”

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

„… transmission hybridization, the classic functions of gear and clutch actuation, lubrication and clutch cooling …”

U. Reichert, A. Albers, K. Wolter, T. Pinner, S. Ott A new approach for the investigation of synchronizations by different shifting characteristics S. 65-66

„… or lubrication. The heat distribution and the wear behavior in the synchronous contact are dependent …”

P. Gwinner, M. Otto, K. Stahl Vibration behaviour of high-speed gearings for electrically driven powertrains S. 81-82

„… to investigate the challenges of high operating speeds in terms of efficiency, lubrication …”

doi.org/10.51202/9783181023136

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