Torsional Vibration Analysis of Six Speed MT Transmission and Driveline from Road to Lab

Paper #:
  • 2017-01-1845

Published:
  • 2017-06-05
Abstract:
When subjected to high speeds and high torques, a vehicle driveshaft and other powertrain components experience an increase in stored potential energy. When the engine and driveshaft are decoupled during an up or down shift, the potential energy is released causing clutch clatter during the shift event. A smooth shift is desired by the customer thus reduction of the clutch clatter will improve customer experience and satisfaction. In this study, a six speed MT, RWD passenger car was used to experimentally capture acoustic and vibration data during the clutch clatter event. To successfully replicate the in-situ results additional data was collected and analyzed for powertrain component roll, and pitch from the test vehicle. These boundary conditions were applied to a reduced car model in a lab environment to successfully replicate the clutch clatter event on a stationary test stand. In addition to the reduced car model test environment, a lumped parameter model of key powertrain components was created to replicate the clutch clatter event. By successfully replicating the clutch clatter event in a static test environment, the lumped parameter model was utilized to update inertia, mass and stiffness elements to study their influence on peak transient vibrations.
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