Predicting the Effect of Gearbox Preconditioning on Vehicle Efficiency

Romain Gillot
Claytex Services Ltd. Edmund House, Rugby Road, Leamington Spa, UK

Alessandro Picarelli
Claytex Services Ltd. Edmund House, Rugby Road, Leamington Spa, UK

Mike Dempsey
Claytex Services Ltd. Edmund House, Rugby Road, Leamington Spa, UK

Ladda ner artikelhttp://dx.doi.org/10.3384/ecp15118135

Ingår i: Proceedings of the 11th International Modelica Conference, Versailles, France, September 21-23, 2015

Linköping Electronic Conference Proceedings 118:14, s. 135-141

Visa mer +

Publicerad: 2015-09-18

ISBN: 978-91-7685-955-1

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


Under extreme climatic conditions, the vehicle fuel consumption can be far from the certified value. Given the growing concern for polluting emissions, it is necessary to investigate a way to improve the vehicle global efficiency and thus close the emissions and fuel consumption gap. A solution is to pre-warm the gearbox in order to make it work at optimal temperature to get the best efficiency possible. Indeed, low lubricant temperature is a source of low vehicle performance due to the viscosity exponentially rising at very low temperature. Using the Powertrain Dynamics library, a vehicle model with a detailed equation based gearbox model taking into account the temperature-dependent losses is developed.


Gearbox; pre-warming; efficiency; fuel consumption; oil temperature


Dempsey M. et al. (2009) Investigating the Multibody Dynamics of the Complete Powertrain System, Como, Italy, Proceedings of the 7th Modelica Conference

Dempsey M. et al. (2006) Coordinated automotive libraries for vehicle system modelling, Vienna, Austria, Proceedings of the 5th International Modelica Conference

Dempsey M. et al. (2012) Predicting the launch feel of automatic and dual clutch transmissions, Munich, Germany, Proceedings of the 9th International Modelica Conference

Farrant P.E. et al. (2005) The Application of Thermal Modelling to an Engine and Transmission to Improve Fuel Consumption Following a Cold Start, Toronto, Canada, Vehicle Thermal Management Systems Conference and Exhibition.

Heingartner P., Mba D., (2003) Determining power losses in the helical gear mesh, Chicago, United States, International Power Transmission and Gearing Conference.

Hydraulic Institute, (2010) Effects of liquid viscosity on rotodynamic (centrifugal and vertical) pump performance.

Jandasek V.J., (1994) Design of Single-stage, Three-element Torque Converter, Design Practice: Passenger Car Automatic Transmissions, Third Edition, AE-18, SAE, pp.75–102

Shin S., Bae I. et al, (2000) The Effect of Blade Geometry on the Performance of an Automotive Torque Converter, FISITA World Automotive Congress, Seoul, Korea SKF website: http://www.skf.com/group/products/bearings-unitshousings/ball-bearings/principles/friction/skf-model/draglosses/drag-losses-in-oil-bath/index.html

Tikhonov K., Koch V.R., Li-ion Battery Electrolytes Designed For a Wide Temperature Range, Covalent Associates, Inc.

Citeringar i Crossref