This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Chamshaft Vibration Characteristic Assessment when Applying Needle Roller Bearings as Solution for Efficiency Increase
Technical Paper
2012-36-0628
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
One of the steps towards higher efficiency internal combustion engines (ICEs) is the application of new improved subsystems, with lower power consumption. One of such subsystems is the needle roller bearing valvetrain, where rolling bearings replace the common sliding bearings designs as camshaft supports, hence decreasing the frictional torque and increasing liquid power at the crankshaft. However, the first question to arise is the vibration characteristic of the system for the new design. In order to initiate the assessment of the vibration behavior of the camshaft, some fundamental investigations should be made, such as natural frequency identification. For that, one might benefit from virtually evaluate these characteristics via FEA / Rotordynamics algorithm, reducing the need for expensive experimental setups of the complete valvetrain. This work intends to assess the applicability of these both methods to the camshaft vibration problem. Also, experimental data are used in order to check theorical results and the validity of models.
Authors
Topic
Citation
Tuckmantel, F., Nonato, F., and Freitas, T., "Chamshaft Vibration Characteristic Assessment when Applying Needle Roller Bearings as Solution for Efficiency Increase," SAE Technical Paper 2012-36-0628, 2012, https://doi.org/10.4271/2012-36-0628.Also In
References
- Tuckmantel, F. Nonato, F. Silva, H. The Application of Camshaft Rolling Element Bearings as a Solution for CO2 Emission Reduction on Internal Combustion Engines Proceedings of 21st SAE Brasil International Congress 2012
- Engine System Publication Schaeffler Automotive Aftermarket GmbH & Co. KG 2006
- Kramer, E. Dynamics of Rotors and Foundations Springer-Verlag 1993