Neil Roberts
Claytex Services Ltd., Edmund House, Rugby Road, Leamington Spa, UK
Mike Dempsey
Claytex Services Ltd., Edmund House, Rugby Road, Leamington Spa, UK
Download article
http://dx.doi.org/10.3384/ecp12076295Published in: Proceedings of the 9th International MODELICA Conference; September 3-5; 2012; Munich; Germany
Linköping Electronic Conference Proceedings 76:30, p. 295-302
Published: 2012-11-19
ISBN: 978-91-7519-826-2
ISSN: 1650-3686 (print), 1650-3740 (online)
The Powertrain Dynamics Library (PTDynamics) has been developed using a new approach to modelling the mechanics of rotating MultiBody systems. This paper will highlight the recent developments within the PTDynamics library with a focus on the dynamic torque converter and wet clutch models that enable the prediction of the launch feel of automatic and dual clutch transmission equipped vehicles. Two examples are presented: one that compares the effect of oil temperature on the initial launch of a vehicle with a dual wet-clutch transmission; and a second that compares the behaviour of steady state and dynamic torque converter models.
powertrain dynamics; driveability; dynamic torque converter; wet clutch; automatic transmission; dual-clutch transmission
[1] Dempsey M.; and Picarelli A. Investigating the MultiBody Dynamics of the Complete Powertrain System. Como; Italy: Proceedings 7th Modelica Conference; 2009.
[2] Dempsey M.; Gäfvert M.; Harman P.; Kral C.; Otter M.; and Treffinger P.; Coordinated automotive libraries for vehicle system modelling; Vienna; Austria; Proceedings of the 5th International Modelica Conference; 2006.
[3] Hrovat D.; and Tobler W.E.; Bond-graph modelling and computer simulation of automotive torque converters. Journal of the Franklin Institute 319;93-114; 1985.
doi: 10.1016/0016-0032(85)90067-5.
[4] Yang Y.; Lam R.; and Fujii T.; Prediction of Torque Response During the Engagement of Wet Friction Clutch. SAE Technical Paper; 981097; 1998.
[5] Patir N.; and Cheng H.; Application of Average Flow Model to Lubrication Between Rough Sliding Surfaces. ASME Journal of Lubrication Technology; 101; 220; 1979.
doi: 10.1115/1.3453329.
[6] American Society for Testing and Materials (ASTM) International. D341 -09 Standard Practise for Viscosity-Temperature Charts for Liquid Petroleum Products; Accessed 08/05/2012 http://www.astm.org/Standards/D341.htm
[7] Otter M.; Elmqvist H.; and Mattsson S.E.: The New Modelica MultiBody Library; Linkoping; Sweden; Proceedings of the Modelica 2003 Conference; 2003
[8] E. Cacciatori; Advanced Control Concepts for a Parallel Hybrid Powertrain with Innitely Variable Transmission;" Ph.D. dissertation; Cranfield University; Cranfield; 2007.
