1. School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510641；
2. Ningbo Hongxie Clutch Co., Ltd., Ningbo 315807
Abstract：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.
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