Shifter Cable Vibration Transfer and Kinematic Simulation: Case Study 2005-01-2379
The shifter lever is one of the main customer contact points in the vehicle. Vibration levels at this contact point have an effect on perceived vehicle quality. For this reason, shifter lever vibration and the corresponding transfer paths from the transmission to the shifter lever need to be considered during vehicle development. On a recent program, experimental measurements identified the shifter cable to be a significant transfer path for shifter lever vibration. An integrated Computer Aided Engineering (CAE) and experimental effort was undertaken to model and optimize the shifter lever and cable assembly for reduced vibration.
Experimental data was used to better understand the vibration phenomenon, set boundary conditions for the CAE modeling, and for correlation. The CAE model contains the shifter lever assembly and a detailed cable assembly model. Once the model was correlated, a Design of Experiments (DOE) simulation was used to determine the factors that could be modified to best reduce vibration levels.
Along with shifter lever vibrations, shift effort can affect the vehicle's perceived quality. To address this subject, the CAE model developed for simulating shifter lever vibrations was also designed to simulate shift effort measured at the top of the shifter lever. Measurements were taken in vehicle of the required shift effort and used for validation of the CAE model. The results of this work are discussed in this paper.