The purpose of the model is to analyze the performance of torsional vibration reduction for a clutch based on trouble shooting for reducing abnormal noise during vehicle accelerating. The input and output rotational speed of a clutch can be calculated using the developed model if the torque fluctuation of the flywheel is assumed, so the isolation for torsional vibration of a clutch can be estimated directly. An abnormal noise at the cabin for a passenger car is perceived at accelerating of a car with 3 gear WOT and the engine speed is at the range of 1700 rpm to 2500rpm. To reduce the noise, an optimization model is presented by maximizing the isolation of a clutch at the rotational speed of 1700 rpm to 2500rpm, and taking the torsional stiffness and damping of a clutch as design variables. After installing the optimized clutch in the car, the noise at the engine compartment and at the cabin and vibration at the bracket of transmission mount is measured and compared with that using original clutch. The experiment demonstrates that the noise and vibration are reduced greatly with the optimized clutch, which validates the proposed model and calculated results.
Key words
Abnormal noise during car accelerating /
Clutch /
Noise at engine compartment /
Vibration of transmission bracket
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1] Ariga K. et al. Reduction of Transaxle Gear Noise by Gear Train Modification. SAE Technical Paper 922108.
[2] Mitchell L. D. A Basic Approach to Gearbox Noise Prediction. SAE Technical paper821065.
[3] W.Loh,E. Kuo,D. Li,I.White,M.Rumpel.Chassis System Integration Approach for Vehicle High Mileage NVH Robustness. SAE 980903 .
[4] T.C. Lim, R.Singh. Vibration transmission through rolling element bearings, part 1: Bearing stiffness for mulation. Journal of Sound and Vibration. 1990,139(2):179-199.
[5] R.Singh, H.Xie, R.J.Comparin. Analysis of Automotive Neutral Gear Rattle[J]. Journal of Sound and Vibration, 1989, 131:177-196.
[6] C.Padmanabhan, R.Singh. Spectral coupling issues in a two degree of freedom system with clearance non-linearities[J]. Journal of Sound and Vibration, 1992, 155(2):209-230.
[7] Klaus Steinel and Gerhard Tebbe. New Torsional Damper Concept to Reduce Idle Rattle in Truck Transmissions, 2004-01-2722
[8] Klaus Steinel. Clutch Tuning to Optimize Noise and Vibration Behavior in Trucks and Buses. SAE Technical Paper Series 2000 -01-3292.
[9] 卢剑伟,沈博,钱立军. 基于齿轮非线性动力学的变速器异响分析[J]. 汽车工程,2007,06:533-536.
[10] C.L.Gaillard, R.Singh. Dynamic analysis of automotive clutch dampers. Applied Acoustics. 2000,60:399-424.
[11] D.Centea, H.Rahnejat, and M.T.Menday. Non-Linear Multi-Body Dynamic Analysis for the Study of Clutch Torsional Vibrations (Judder). Applied Mathematical Modelling. 2001,25:177-192.
[12] Ph Couderc, J Callenaere, J Der Hagopian. Vehicle Driveline Behavior: Experimentation and Simulation. Journal of Sound and Vibration. 1998,218(1):133-157
[13] Duan C, Singh R.Stick-Slip Behavior of Torque Converter Clutch. SAE 2005 -01-2456.
{{custom_fnGroup.title_en}}
Footnotes
{{custom_fn.content}}