Tribological properties of fuel economy gearbox oils

verfasst von

Norbert Bader, Eike C. Wittek, Gerhard Poll

Abstract

All candidate oils reduce churning losses and total bearing friction even though they extend operation under mixed lubrication, except for taper roller bearings at very low speeds An even more pronounced bearing friction torque reduction may be obtained by minimizing the amount of lubricant Early fatigue occurs only with the MTF candidate oil in the cylindrical thrust bearing test at 100 °C, notât 90 °C In contrast to the low reference oil the early failures with the MTF candidate oil are not related to White Etching Cracks (WEA) Measurable wear of the raceways is observed for the MTF candidate oil as well, to a larger extent at 90 °C and less prominent at 100 °C. With the other oils, wear is negligible after running-in, in despite of mixed lubrication In summary, a substantial reduction of friction is possible with the investigated fuel economy oils without creating wear or early fatigue problems, with the exception of the MTF candidate oil.

Organisationseinheit(en)

Institut für Maschinenkonstruktion und Tribologie

Typ

Aufsatz in Konferenzband

Seiten

959-973

Anzahl der Seiten

15

Publikationsdatum

2014

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Oberflächen, Beschichtungen und Folien, Kolloid- und Oberflächenchemie, Prozesschemie und -technologie, Oberflächen und Grenzflächen, Werkstoffchemie