Abstract
Silicone oil for use in working fluid for a viscous damper has a poor oiliness so that oil film is apt to break at sliding parts between its housing and inertia ring to often cause “galling”, thus durability of the damper being remarkably impaired.
In order to improve the durability of viscous damper taking the above defect into consideration, a newly designed viscous torsional vibration damper incorporating a working oil section having a function to damp vibrations and a sliding section for holding a position of inertia ring sealed in the housing respectively independently, was deviced and a prototype thereof was manufactured. Measurement of torsional vibration was made on the prototype equipped to a practical engine to examine characteristics of such a damper, and consideration was given to a method of designing the damper.
