Prediction of friction in EHL contacts for drivetrain applications
Gajarajan Sivayogan
Ramin Rahmani
Homer Rahnejat
2134/36639
https://repository.lboro.ac.uk/articles/conference_contribution/Prediction_of_friction_in_EHL_contacts_for_drivetrain_applications/9557810
Prediction of frictional losses in elastohydrodynamic lubricated contacts is of particular
importance from the viewpoint of energy efficiency, thus reduced levels of emissions. There are
increasingly stringent government regulations. Thus, the industry strives to identify potential
losses and improve energy efficiency. Most losses occur in a large number of load bearing
conjunctions in all forms of mechanisms and machines. These losses are affected by the operating
conditions, such as applied load, contact kinematics and generated temperature. Prediction of
prevailing conditions, such as generated pressures, film thickness is the prelude to evaluation of
frictional power losses. Many contact conjunctions in vehicular drivetrains are subjected to
elastohydrodynamic conditions, the fundamental aspects of which are still evolving. In particular,
effective prediction of performance of elastohydrodynamic lubricated (EHL) contacts is subject
to inclusion of realistic contact conditions, particularly with respect to inlet and outlet boundary
conditions as well as kinematics of contact. This paper demonstrates the importance of boundary
conditions on predictions of prevailing situations.
2019-01-21 13:40:10
Elastohydrodynamic Lubrication (EHL)
Variable entrainment velocity distribution
Elliptical point contacts
Mechanical Engineering not elsewhere classified