... Many high speed turbochargers operate with limit cycle vibration as a result of fluid-film instability. This problem has been under investigation for the past seven years. Only now has a turbocharger with fluid film bearings been run to full speed and loaded, with essentially no bearing induced...

... 10 02 2012 It is well known that the standard bearing for high speed turbochargers is a floating ring design. This design typically results in a limit cycle instability with larger than desired overall vibration response. The desire would be to have a small synchronous vibration...

... 22 04 2011 Automotive turbochargers are known to have operation into the self-excited unstable vibration region. In the past these instabilities have been accepted as unavoidable, but recent developments in analysis and instrumentation may make it possible to reduce or eliminate them...

... imbalance to determine the influence on the level of instability frequency components for a small high speed turbocharger rotor. The initial experimental results for the application of a known imbalance on the compressor end of a high speed turbocharger, indicates a reduced level for the lower instability...

...Proceedings of the STLE/ASME International Joint Tribology Conference IJTC2008 A T in V A co st sh m th am re d th in sp K IN a an d tu te an sy cr en er to of on re at ct on at or nd ed nd he at re ed rst er of TLE/ASME International Joint Tribology Conference BSTRACT The design of a turbocharger...

... 07 10 2008 Automotive turbochargers are known to have operation into the linear unstable region. The operation in the nonlinear limit cycle has been tolerated on most applications to date. The need for quieter, smoother operation and reduced emissions has prompted new evaluations...