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Thorsten Lajewski - Friction Potential Estimation for Autonomous Driving

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Thorsten Lajewski

Friction Potential Estimation for Autonomous Driving

Series: Verkehrstechnik/Fahrzeugtechnik

Volume 816 2022

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Introduction S. 1-35

„… value of measurements on dry asphalt is around 0.9.On wet asphalt a reduction in the friction potential …” „… the set nominal value or the conditions to classify an accident ascaused by low friction potential are …” „… significantly lower friction value should be used for thevelocity adaptation. Figure 1.4 left shows an examplary …”

Fundamentals of Tyre Friction and its Effect in Tyre Models S. 36-54

„… short period of time. The devicealso allows the measure of a friction potential value. This measured …” „… friction potential value on hardpacked snow was measured between 0.3 and 0.6. The slip-stiffness of the …” „… butalso polishes the ice surface further reducing the hysteresis friction. The local melt-ing depends on …”

Intermediate Layer Classification S. 104-126

„… the SWB measurementson the test course, a change from dry to damp conditions decreases the friction …” „… po-tential by some margin, while ice or snow massively reduces the friction potential.Therefore, in this …” „… pixel in the radar image ischosen. For each of the three radar products, the value of this pixel and the …”

doi.org/10.51202/9783186816122

VDI Wissensforum GmbH - Kupplungs- und Bremssysteme für mobile und stationäre Anwendungen

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VDI Wissensforum GmbH (ed.)

Kupplungs- und Bremssysteme für mobile und stationäre Anwendungen

Series: VDI-Berichte

Volume 2414 2023

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P. Strobl, T. Schneider, K. Voelkel, K. Stahl Influence of the Steel Plate on the Friction Behavior of Automotive Wet Disk Clutches S. 21-48

„… details of the plates. Parameter Unit Value outer friction diameter da mm 168.0 inner friction diameter di …” „… very low sliding speeds needs special treatment in evaluating the friction behavior. To minimize local …” „… friction coefficient value is compared to the median from the sixteen individual measurements of an areal …”

L. Pointner-Gabriel, K. Voelkel, H. Pflaum, K Stahl A Methodology for Data-driven Modeling and Prediction of the Drag Losses of Wet Clutches S. 125-154

„… around a quasi-steady value can be observed. Consequently, the local minimum shear stress 𝜏 , of Phase …” „… the material properties of the friction lining affect the drag loss behavior [12, 21]. The …” „… sizes and numbers of gaps, the drag torque is related to the mean diameter and the total friction …”

C. Sax, A. Stroh, R. Leister, M. Dreisbach, J. Kriegseis, C. Denda, P. Bürk Fluid-mechanical evaluation of different clutch geometries based on experimental and numerical investigations S. 109-124

„… experimental studies could quantify the local wall shear stress. Additionally, the volumetric flow topology …” „… within the investigated groove geome-tries and their local influence on the wall shear stress …” „… relative rotation of the disks (friction and steel disks). In the present case of braking operation, this …”

doi.org/10.51202/9783181024140

VDI Wissensforum GmbH - Gleit- und Wälzlagerungen 2021

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VDI Wissensforum GmbH (ed.)

Gleit- und Wälzlagerungen 2021

2021

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D.-O. Leimann Ermittlung der Einflussfaktoren für Schlupf, Hydrogen und Stromdurchgang in der Berechnung zur Abschätzung des Risikos auf frühzeitige Lagerschäden durch White Etching Cracks WEC S. 161-176

„… stresses comparable, friction and hoop stress as calculated, (see equation 2), a harmful stress value can …” „… multiplied with the force value, coming from the basic friction force according to literature. 0,00 50,00 …” „… hydrogen βM-H can decrease the calculated permissible stress value permissible (yM . The equation …”

doi.org/10.51202/9783181023785

VDI-Wissensforum GmbH - DRITEV – Drivetrain for Vehicles 2021

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VDI-Wissensforum GmbH (ed.)

DRITEV – Drivetrain for Vehicles 2021

Series: VDI-Berichte

Volume 2381 2021

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S. Dussinger, T. Wiedemann, B. Harter, B. Wiedenmann Simulation of induced axial forces on planet gear bearings at example of ZF’s 8-speed automatic transmission S. 469-486

„… aim of improving energy efficiency and reducing CO2 emissions, friction losses within driveline …” „… friction losses. The investigation is carried out using finite element simulations. Important influencing …” „… such as gear assemblies increases steadily. Friction effects in planetary gear sets from ZF’s 8 …”

M. Dilzer BorgWarner P2 Modules – from HV to 48V S. 35-46

„… specifically balance their portfolio and control fleet emissions which are strongly dependent on local markets …” „… and local legislative boundary conditions. BorgWarner – Positioning for the future To account for …” „… . The P2 PHEV gives the best economic value and typically offers up to 60% CO2 reduction in comparison …”

H. Wittig, J. Engasser, A. Glavinic AEROFLEX – Distributed Hybrid Drivetrain for Long Haul Freight Vehicles S. 593-608

„… stability guard function restricts the room for torque distribution. In each trailer unit a Local System …” „… request between the friction brakes and the electric drive. The service brake request is distributed with …” „… friction brakes. Therefore, it communicates with the dolly EBS via an additional ISO 11992 CAN connection …”

F. Müller-Deile Advanced design of electric machines for trailers with electric axles S. 653-668

„… meaning hybridization or full electric vehicles. As an alternative to the local hybridization of the …” „… truck EBS. The other endurance brakes of the truck and the friction brakes are only activated if the …” „… form the truck EBS and other local parameters such as the battery charge status and component …”

S. Kaimer Power to the Wheels – Challenges and Benefits of Electrified AWD for EVs and Hybrid vehicles S. 117-124

„… opportunity There is a consensus that future CO2 targets and local requirements of zero-emission driving …” „… the mTV, generates the torque difference by raising the effective value above the nominal torque of …” „… were primarily used to improve traction, for example off-road or in poor friction conditions such as …”

T. Kaufhold, F. Schneider, O. Groneberg, A. Moser Modular Starting and Damping System integrated in 48V Hybrid Architectures – Efficient Starting System for Hybrid Vehicle Architectures S. 347-360

„… ICE start and the physical starter disconnect. The biggest value added through the PES is its drag …” „… roller mass below a certain level is not recommended, since the impact of friction and contamination …” „… which results in minor drag torque of the dry friction bushing. After engine start, the ring-gear and …”

A. Bagh, D. Magnor, J. Kneiber, F. Löhe eTransport – Application of axle-integrated e-drive in urban LCV and MD trucks S. 637-652

„… , in cooperation with development partners, is able of retrofitting existing trucks to provide local …” „… high friction losses. In addition VDI-Berichte Nr. 2381, 2021640 to this the single wheel drive …” „… motor and gear transmission. High power density is attended by local power loss that must be …”

M. Muether, B. Heuser, L. Virnich, A. Guedden, T. Luediger, D. van der Put Development trends towards CO2-neutral powertrains for HD applications S. 529-550

„… losses and reducing engine friction improves efficiency by ~1.0 %points. In the second phase an updated …” „… regulations are not clearly defined yet and/or have major uncertainties (e.g., local access restrictions …” „… value in EGR case) or leaner, both CO and HC emissions are near zero. Brake Specific NOx Emissions …”

doi.org/10.51202/9783181023815

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

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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 …”

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

„… clutches is the temperature on the friction interface. Owing to the thin, rotating geometry of the plates …” „… 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 …”

doi.org/10.51202/9783181023822

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