We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Grease Degradation in Constant Velocity (CV) Joints.
- Authors
Chul-Hee; Jae Young Choi; In Sik Jeon; Wonoh Cho; Hyukchae Yun
- Abstract
Constant velocity (CV) joints have been widely used for modern vehicles. The sealed grease of CV joints must provide low friction and wear protection for the lifetime use of the vehicle. Grease performance affects the vibration and noise level in the vehicle. Vehicles thai have traveled long distances may suffer mechanical and thermal overloads, thus causing the grease to degrade due to changes in its physical and chemical properties. In this article, the grease degradation phenomenon in CV joints is investigated by collecting grease samples from both tripod joints and Birfield joints in actual vehicles that traveled various ranges of distance. In order to analyze the property changes of grease, grease penetration and oxidation induced time are measured using a penetration meter and infrared (IR) spectrometer respectively. Where oxygen induced time (OIT,) is the point that the oxidation occurs in grease. The performance variations of grease are investigated by measuring the friction and wecir using linear-oscillation (SRV Schwingung (oscillation) Reibung (friction) Verschleiss (wear)) test machine as well as the fourball wear tester Degradation of properties as well as performance in CV joint grease due to physical and/or chemical changes is identified.
- Subjects
VEHICLES; LUBRICATION &; lubricants; OSCILLATIONS; OXIDATION; FRICTION; INFRARED spectroscopy
- Publication
Tribology & Lubrication Technology, 2012, Vol 68, Issue 5, p44
- ISSN
1545-858X
- Publication type
Article