Research for Vehicle Idle Vibration Control Based on Ball-Type Constant Velocity Joint

This paper aims to study an optimization design for reducing the vertical transmission force of ball-type constant velocity joint (CVJ), in order to improve vehicle idle vibration. Firstly the vertical transmission force of ball-type CVJ is measured by bench equipment so the correlation between vertical transmission force amplitude and excitation amplitude, loaded torque, shaft length is obtained. Vertical transmission force amplitude of ball-type CVJ has a positive correlation with excitation amplitude and loaded torque, while negative with shaft length. Then vertical transmission force resultant in wheel sides in idle condition is calculated and a vehicle experiment is proceeded to measure cabin floor vertical vibration acceleration in the same condition. Moreover, an example is given to validate there is a strong linear correlation between the estimated values of vertical transmission force in wheel sides and the measured results of vehicle idle shake. Lastly major factors affecting vertical transmission force of ball-type CVJ are analyzed. Vertical transmission force can be restrained by using low friction grease, reducing ball-cage window interfere and enlarging ball pitch circle diameter (PCD) to optimize vehicle idle vibration. Control methods for vehicle idle vibration presented in this paper apply to both the oil-fueled and hybrid electric vehicles with engine.