Investigation of Self Excited Torsional Vibrations of Different Configurations of Automatic Transmission Systems during Engagement
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Abstract
The vehicle drive line system is subjected to torsional vibration from different sources of the system such as; engine fluctuating torque, Hook’s joint and the final drive. However, the essential source is the friction torque induced in the friction elements, during their engagement. In the automatic transmission system, the planetary gear set includes several friction elements such as; clutch, band brakes, and one way clutch. During the engagement, severe torsional vibration is induced by friction which is noticeable by the passengers in the form of what so called vehicle shunt. In present paper, a torsional vibration model for Drive Line (DL) system includes three different configurations of automatic transmission is constructed. A computer program using MATLAB subroutines is implemented to obtain the system response. Effect of system parameters on the dynamic behavior and stability has been investigated. The system damping and the trend of the friction coefficient have an essential effect on the dynamic behavior and stability of the system. The system response is now predictable with change of the system parameters which opens up the opportunity in future to control the vibration level.
- E. M. Rabeih, “Torsional Vibration Analysis of Automo- tive Drivelines,” Ph.D. Thesis, Leeds University, Leeds, 1997.
- J. Persson, “Integrated Powertrain Control—A Literature Survey on Longitudinal Vibrations, Drivability Aspects and Future Challenges,” MSc. Thesis, Control and Automation Laboratory, Department of Signal and Systems, Chalmers University, Chalmers, 2004.
- L. Coudrec, J. Callenaere, J. Der Hagopian and G. Ferraris, “Vehicle Driveline Dynamics Behavior: Experimen- tation and Simulation,” Journal of Sound and Vibration, Vol. 218, 1998, pp. 133-157. doi:10.1006/jsvi.1998.1808
- N. Zhang, D. Liu, J. Jeyakumaran and L. Villanueva, “Modeling of Dynamic Characteristics of an Automatic Transmission during Shift Changes,” Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering, Vol. 216, No. 4, 2002, pp. 331-341.
- W. Han and S. Yi, “A Study of Shift Control Using the Clutch Pressure Pattern in Automatic Transmission,” Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, Vol. 217, No. 4, 2003, pp. 289-298. doi:10.1243/09544070360613246
- A. Haj-Fraj and F. Pfeiffer, “Optimal Control of Gear Shift Operations in Automatic Transmissions,” Journal of The Franklin Institute, Vol. 338, No. 2-3, 2001, pp. 371-390. doi:10.1016/S0016-0032(00)00091-0
- H. Mikael, “Apparatus for Measurement of Engagement Characteristics of a Wet Clutch,” Wear, Vol. 213, No. 1, 1997, pp. 140-147. doi:10.1016/S0043-1648(97)00202-0
- E. O. A. Abd Elmaksoud, E. M. Rabeih, N. A. Abdel-halim and S. M. El Demerdash, “Investigation of the Torsional Vibration of Automatic Transmission System with Simple Planetary Gear Set during the Engagement,” Engineering Research Journal, Vol. 127, 2010, pp. AT1- AT14
- J.-M. Seo, and S.-J. Yi, “Design of an Automatic Transmission System Having an Arbitrary Power Flow Using the Automatic Power Flow Generation Algorithm,” Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, Vol. 219, No. 9, 2005, pp. 1085-1097. doi:10.1243/095440705X34766
- S. Hwang, J. Chen, L. Liu and C. Ling, “Modeling and Simulation of a Powertrain Vehicle System with Auto- matic Transmission,” International Journal of Vehicle Design, Vol. 23, No. 1-2, 2000, pp. 145-160. doi:10.1504/IJVD.2000.001888
- H. Heisler, “Advanced Vehicle Technology,” Second Edition, Butterworth-Heinemann, Oxford, 2002.