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Improving Low Frequency Torsional Vibrations NVH Performance through Analysis and Test
Technical Paper
2007-01-2242
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Low frequency torsional vibrations can be a significant source of objectionable vehicle vibrations and in-vehicle boom, especially with changes in engine operation required for improved fuel economy. These changes include lower torque converter lock-up speeds and cylinder deactivation.
This paper has two objectives:
- 1)Examine the effect of increased torsional vibrations on vehicle NVH performance and ways to improve this performance early in the program using test and simulation techniques. The important design parameters affecting vehicle NVH performance will be identified, and the trade-offs required to produce an optimized design will be examined. Also, the relationship between torsional vibrations and mount excursions, will be examined.
- 2)Investigate the ability of simulation techniques to predict and improve torsional vibration NVH performance. Evaluate the accuracy of the analytical models by comparison to test results.
A simple model is presented which gives fairly accurate results and can be included in a full vehicle finite element model to calculate vehicle level NVH responses. A procedure to calculate the loads to be applied to the model is also presented.
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Citation
Hage, A., Szatkowski, A., and Li, Z., "Improving Low Frequency Torsional Vibrations NVH Performance through Analysis and Test," SAE Technical Paper 2007-01-2242, 2007, https://doi.org/10.4271/2007-01-2242.Data Sets - Support Documents
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Also In
SAE 2007 Transactions Journal of Passenger Cars: Mechanical Systems
Number: V116-6; Published: 2008-08-15
Number: V116-6; Published: 2008-08-15
References
- Min K.J. Kang C.W. Jung S.G. “Refinement of the Interior Booming Noise Caused by the Lock-up Clutch in Automatic Transmission Vehicle” SAE Paper 2005-01-2405
- Higashimata A. Adachi K. Segawa S. Kurogo N. “Development of a Slip Control System for a Lock-up Clutch” SAE Paper 2004-01-1227
- Hartog Den “Mechanical Vibrations” McGraw-Hill Book Company 1947
- Harrison Matthew “Vehicle Refinement - Controlling Noise and Vibration in Road Vehicles” SAE International 2004
- VandenPlas B. Gotoh K. Dutre S. “Predictive Analysis for Engine/Driveline Torsional Vibration in Vehicle Condition using Large Scale Multi Body Model” SAE Paper 2003-01-1726