Commenced in January 2007
Paper Count: 31103
Study of Effect of Gear Tooth Accuracy on Transmission Mount Vibration
Abstract:Transmission dynamics occupy major role in customer perception of the product in both senses of touch and quality of sound. The quantity and quality of sound perceived is more concerned with the whine noise of the gears engaged. Whine noise is tonal in nature and tonal noises cause fatigue and irritation to customers, which in turn affect the quality of the product. Transmission error is the usual suspect for whine noise, which can be caused due to misalignments, tolerances, manufacturing variabilities. In-cabin noise is also more sensitive to the gear design. As the details of the gear tooth design and manufacturing are in microns, anything out of the tolerance zone, either in design or manufacturing, will cause a whine noise. This will also cause high variation in stress and deformation due to change in the load and leads to the fatigue failure of the gears. Hence gear design and development take priority in the transmission development process. This paper aims to study such variability by considering five pairs of helical spur gears and their effect on the transmission error, contact pattern and vibration level on the transmission. Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 35
 Krishnaswami, R., Kaatz, S., Hildebrand, D., Hiatt, J. et al., "Gear Whine Reduction for a New Automatic Transmission," SAE Technical Paper 2001-01-1506, 2001, https://doi.org/10.4271/2001-01-1506.
 Houser, D. and Harianto, J., "Manufacturing Robustness Analysis of the Noise Excitation and Design of Alternative Gear Sets," SAE Technical Paper 2001-01-1417, 2001, https://doi.org/10.4271/2001-01-1417.
 Krishnaswami, R., DeFore, M., Hildebrand, D., Metcalf, J. et al., "Gear Whine Improvements for an Automatic Transmission through Design Retargeting and Manufacturing Variability Reduction," SAE Technical Paper 2001-01-1505, 2001, https://doi.org/10.4271/2001-01-1505.
 Fett, G. and Follis, M., "Causes of Variability in Gear Fatigue Testing," SAE Technical Paper 2003-01-1308, 2003, https://doi.org/10.4271/2003-01-1308.
 Pears, J., Smith, A., Platten, M., Abe, T. et al., "Predicting Variation in the NVH Characteristics of an Automatic Transmission using a Detailed Parametric Modeling Approach," SAE Technical Paper 2007-01-2234, 2007, https://doi.org/10.4271/2007-01-2234.
 Stilwell, E., Jamaluddin, R., and Wilson, B., "Boundary Conditions Affecting Gear Whine of a Gearbox Housing Acting as a Structural Member," SAE Technical Paper 2009-01-2031, 2009, https://doi.org/10.4271/2009-01-2031.
 Athavale, S., Krishnaswami, R., and Kuo, E., "Estimation of Statistical Distribution of Composite Manufactured Transmission Error, A Precursor to Gear Whine, for A Helical Planetary Gear System," SAE Technical Paper 2001-01-1507, 2001, https://doi.org/10.4271/2001-01-1507.
 Smith, J. D. (2003). Gear Noise and Vibration. United States: CRC Press.