Korrelation mikrotribologischer Eigenschaften mit dem makroskopischen Reibungsverhalten am Beispiel von Synchronisierungen

verfasst von

G. Poll, M. Spreckels, M. Gronitzki

Abstract

In the traditional manually operated vehicle transmissions and in their modern automated versions, synchronizers are widely used to equalize gear speeds while shifting. For their proper functioning, the sliding friction between the cones must be carefully controlled. The macroscopic frictional characteristics of complete synchronizers were extensively studied on test benches at the Institute of Machine Elements, Engineering Design and Tribology at the University of Hannover, Germany, using Spirax^TM MA80W oil (tribosystem A) and ATF Dexron IID oil (tribosystem B). From these tests, conclusions were drawn on the contribution of boundary friction. Direct measurements required focusing on the microscopic real areas of contact with direct interaction of the surfaces. A combination of microscratch-testing and atomic force microscopy at the Institute of Microtechnology of the University of Hannover allowed correlation of the macroscopic measurements to microscopic surface properties.

Organisationseinheit(en)

Institut für Maschinenkonstruktion und Tribologie

Typ

Artikel

Journal

Tribologie und Schmierungstechnik

Band

47

Seiten

13-17

Anzahl der Seiten

5

ISSN

0724-3472

Publikationsdatum

03.2000

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Werkstoffmechanik, Maschinenbau, Oberflächen und Grenzflächen, Oberflächen, Beschichtungen und Folien