Ting Noise Generation in Automotive Applications

Paper #:
  • 2017-01-1121

Published:
  • 2017-03-28
Abstract:
Ting noise has a significant contribution to the driver’s perceivable transient NVH during acceleration from a stop or while driving. This metallic noise can be present in vehicles with any variant of the driveline architecture (FWD, AWD, RWD and 4X4). This paper details the generation mechanism of the noise excitation and defines the physical and design parameters that influence it. This paper will focus on the noise generated between halfshaft to wheel hub interface. Same phenomena apply to all other torque transferring components that use axial splines assembled with specified nut torque. Bench tests were conducted measuring the transient noise generated when powertrain torque is applied to the halfshaft which moves relative to wheel hub after overcoming the frictional torque. The properties of two interfacing surfaces (halfshaft joint tulip and wheel hub) are studied; including coefficient of friction and design features. An NVH metric is developed and its sensitivity to the various parameters is presented. Typical ting noise mitigation techniques are discussed.
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