Open Access
Subscription Access
An Approach to Minimization of Drive Train Noise Through Redesign of Engine Mounts
Subscribe/Renew Journal
Drive train noise is more annoying for passenger. For a V-hull base mine protected 4WD defence-vehicle, metallic noise was observed from drive train. To resolve this kind of NVH problem of complicated vehicle like defence required commending knowledge base and experience or say know-how. The critical constraint of subject vehicle was fixed position of engine or engine mounts and transfer case. This causes higher slope equivalent angle of first drive shaft with respect to the installation standard. Noise issue observed as consequence of aforesaid issue which has impact installation parameters of torsional, inertia and secondary coupling excitation frequencies. In this context, a structured methodology has been followed in present work for finding ischolar_main causes and optimizing the design to come out with optimum solution. Engine mounts have major influence to finalize first drive line slope angle. Hence, re-designing and verification have been done for engine mounts considering its major design parameters and criteria (e.g. shape factors, shore hardness, static deflection and isolation efficiency). At the same time, effects of those changes have been verified theoretically and practically on vehicle. Pass by noise, cabin inside noise, isolation efficiency of front and rear mounts and vehicle floor vibration level were measured. The objective of the exercise is to find out a solution for minimization of drive-train noise.
Keywords
Engine Mounts, Drive Train Noise, Torsional Excitation, Inertia Excitation, Secondary Coupling.
User
Subscription
Login to verify subscription
Font Size
Information
- W.T. Thomson. 1982. Theory of Vibration with Application, Second Edition, Prentice Hall of India Private Ltd, New Delhi.
- P. Srinivasulu and C.V. Vaidyanathan. 2009. Hand book of Machine Foundation, Chapter - 7, 23rd reprint, Tata McGraw Hill publication, New Delhi.
- F.F. Timpner. Design consideration in engine mounting, SAE Technical Paper 650093.
- K. Mcintire. 2006. Installation Requirements-Engine Mounting, AEB 21.36.
- R Racca. 2007. Engine Mounting Design Considerations, Barry Wright Corp.
- Universal Joint and Driveshaft Design Manual, AE-7, SAE Int.
- Drive Shaft Installation, Spicer, J3311-1- HVTSS, Feb 2005.
- M.S. Foumani, A. Khajepore and M. Durali. 2003. Optimization of engine mount characteristics using experimental/numerical Analysis, J. Vibration and Control, 1121-1139. https://doi.org/10.1177/107754603030697.
- M.W. Suh, M.B. Shim, M.S. Kim and S.K. Homg. 2003. Multidisciplinary design optimization of engine mounts with consideration of the driveline, Proc. IMechE, Part D: J. Automobile Engg., 217, 107-114.
- G. Paliwal, N. Sukumar, U. Gupta and S. Roy. 2015. Design optimization of powertrain mounts for vibration isolation on heavy commercial vehicle (HCV) six cylinder inline diesel engine, SAE Tech. Paper, 2015-26-0127. https://doi.org/10.4271/2015-26-0127.
- Automotive Vehicles - Noise Emitted by Moving Vehicles-Method of Measurement, IS: 3028, 2007, Ed 3.2, Bureau of Indian Standards.
- AIS-020, Automotive Vehicles - Interior Noise - Method of Measurement and Requirements, India 2004.
- M. Horovitz. 1957-58. Suspension of internal combustion engines in vehicles, Proc. IMechE, Part D: J. Automobile Engg., 1, 17-35.
- S. Shih, J. Yruma and P. Kittredge. 2001. Drivetrain noise and vibration troubleshooting, SAE Tech. Paper, 2001-01-2809. https://doi.org/10.4271/2001-01-2809.
Abstract Views: 508
PDF Views: 213