Clemens Schlegel
Schlegel Simulation GmbH, Freising, Germany
Andreas Hösl
BMW Group, Munich, Germany
Sergej Diel
University of Applied Sciences Landshut, Landshut, Germany
Ladda ner artikel
http://dx.doi.org/10.3384/ecp09430059Ingår i: Proceedings of the 7th International Modelica Conference; Como; Italy; 20-22 September 2009
Linköping Electronic Conference Proceedings 43:48, s. 434-443
Publicerad: 2009-12-29
ISBN: 978-91-7393-513-5
ISSN: 1650-3686 (tryckt), 1650-3740 (online)
Drag torques of gearboxes are an important part of the overall losses in today’s vehicle drive trains. From measurements it is well known that overall drag torques of vehicle gearboxes vary significantly over the range of operating points and speeds; depending on the interaction of the losses of the single gearbox elements like bearings; gearings; etc. Because today’s vehicle emission regulations are becoming stricter and stricter "drag torque design" of gearboxes will be even more important in the future. Prediction of losses helps to save cost (e.g. drag torque measurements); speeds up the development and allows to assess many concepts in short time.
We collected detailed semi-analytical drag models for the common gearbox components from literature and from manufacturer information and implemented them in a Modelica library. This library contains models for radial shaft seals; rotary unions; synchronizers; multi-disc clutches; helical gearings; planetary gearings; various kinds of bearings; lubrication systems and lubricant characteristics. Using this library drag torques of any vehicle gearbox may be computed for any operating condition (engaged gear;
speed; torque; temperature). Simulation results for a 7 speed double clutch transmission show good correlation with measurements.
[1] S. Mayr; Modellierung der Verluste von Getriebekomponenten zur Berechnung von Gesamtgetriebewirkungsgraden. Diplomarbeit TU München und BMW Group; 2008
[2] Forschungsvereinigung Antriebstechnik; Projekt Nr. 69 / I - IV: “Software WTplus”
[3] H. Naunheimer; B. Bertsche; G. Lechner; Fahrzeuggetriebe; Springer; Berlin; 2007
[4] H. Ohlendorf; Verlustleistung und Erwärmung von Stirnrädern. Dissertation TU München; 1958.
[5] L. Schlenk; Untersuchungen zur Fresstragfähigkeit von Großzahnrädern; Dissertation TU München; 1994
[6] A. Wimmer; Verlustoptimierte Verzahnung; FVA Forschungsvorhaben Nr. 372; Heft 731; Abschlussbericht; 2004
[7] W. Mauz; Hydraulische Verluste von Stirnradgetrieben bei Umfangsgeschwindigkeiten bis 60 m/s; Dissertation Uni Stuttgart; 1987
[8] Y. Ariura; T. Ueno; The Lubricant Churning Loss and its Behavior in Gearbox in Cylindrical Gear Systems; Journal of Japan Society of Lubrication Engineers; Vol. 20; No 3; 1975
[9] J. Maurer; Ventilationsverluste; FVA Forschungsvorhaben Nr. 44/VI; Heft 432; Abschlussbericht; 1994
[10] Bearinx ®; Schaeffler KG; Herzogenaurach; Germany
[11] J. Koryciak; Wälzlagerreibmomente; FVAForschungsvorhaben Nr. 382; Heft 823; Abschlussbericht; 2007
[12] A. Palmgren; Neue Untersuchungen über Energieverluste in Wälzlagern; VDI-Berichte 20; S. 117-121; 1957
[13] T.A. Harris; M.N. Kolzalas: Roller Bearing Analysis I+II; 5th edition; Taylor & Francis; New York; 2007
[14] INA Wälzlager KG; Basic principles rolling bearings; Friction and increases in temperature; http://medias.schaeffler.de/medias/de!hp.tg.cat/tg_rot*CHEBHCFE;bhHLIZo_3h6b?lang=en
[15] SKF Kugellagerfabriken GmbH; Katalog 2004
[16] H. Linke; Stirnradverzahnung. Hanser Verlag; 1996
[17] J. Kettler; Planetengetriebe-Sumpftemperatur; FVA-Forschungsvorhaben Nr. 313; Heft 639; Forschungsbericht; 2002
[18] M. Gronitzki; Untersuchungen zur Funktion und Auslegung von Rechteckdichtringen für Drehdurchführungen; Dissertation Uni Hannover; 2006
[19] Forschungsvereinigung Antriebstechnik; Projekt Nr. 575 / I: “Synchro Schleppmomente”
[20] www.dynasim.com
[21] T. Skubasz: Untersuchungen von Schleppverlusten an Synchronisierungen; Getriebe in Fahrzeugen 2008; VDI-Berichte 2029; VDIVerlag; Düsseldorf; 2008
