Conference article

Predicting the launch feel of automatic and dual clutch transmissions

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 articlehttp://dx.doi.org/10.3384/ecp12076295

Published in: Proceedings of the 9th International MODELICA Conference; September 3-5; 2012; Munich; Germany

Linköping Electronic Conference Proceedings 76:30, s. 295-302

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Published: 2012-11-19

ISBN: 978-91-7519-826-2

ISSN: 1650-3686 (print), 1650-3740 (online)

Abstract

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.

Keywords

powertrain dynamics; driveability; dynamic torque converter; wet clutch; automatic transmission; dual-clutch transmission

References

[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.

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