Drive Train Vibrations: Solving the Conflict Between Efficiency and Drivability

<div>A unique torque converter test setup was used to measure the torque transmissibility frequency response function of four torque converter clutch dampers using a stepped, multi-sine-tone, excitation technique. The four torque converter clutch dampers were modeled using a lumped parameter technique, and the damper parameters of stiffness, damping, and friction were estimated using a manual, iterative parameter estimation process. The final damper parameters were selected such that the natural frequency and damping ratio of the simulated torque transmissibility frequency response functions were within 10% and 20% error, respectively, of the experimental modal parameters. This target was achieved for all but one of the tested dampers. The damper models include stiffness nonlinearities, and a speed-dependent friction torque due to centrifugal loading of the damper springs. Recommendations include further testing to separate the coulomb friction mechanism from the viscous damping mechanism, testing with the torque converter operating in open mode, and tests on a series of customized dampers with centrifugal pendulum absorber hardware.</div>

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Development of a Willans Line Rule-Based Hybrid Energy Management Strategy

Legg¹,

Nelson²

2022

SAE Technical Paper Series

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Drive Train Vibrations: Solving the Conflict Between Efficiency and Drivability

Cited by 3 publications

References 2 publications

The Electrical Dual Mass Flywheel -an Efficient Active Damping System

The Electrical Dual Mass Flywheel -an Efficient Active Damping System

Torque Converter Dynamic Characterization Using Torque Transmissibility Frequency Response Functions: Locked Clutch Operation

Development of a Willans Line Rule-Based Hybrid Energy Management Strategy

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