Title: Experimental and modelling analysis of dynamic characteristic for automatic tensioner in a two pulley-belt drive system

Authors: Xiang-kun Zeng; Hong-yun Wang

Addresses: School of Automotive Engineering, Guangdong Polytechnic Normal University, Guangzhou 510665, China ' School of Automotive Engineering, Guangdong Polytechnic Normal University, Guangzhou 510665, China

Abstract: Experimental methods and parameters to evaluate the dynamic performances of an automatic tensioner in engine front end accessory drive (FEAD) system are discussed. The dynamic performances of a tensioner include dynamic stiffness and loss angle. The influences of the pre-torque, excitation amplitude and excitation frequency on the dynamic characteristics of tensioner are measured and investigated. Considering the pre-torque, spring stiffness and damping coefficient of tensioner, and the moment of inertia for the tensioner arm, a hysteretic model used for modelling the relations between the torque and angular displacement of a tensioner is proposed. Parameters of the model are identified using least-squares method. Then, a two pulley-belt drive system with two pulleys, a tensioner and a serpentine belt is taken as an example to demonstrate the proposed models. The dynamical properties of a tensioner, and the rotational vibrations of driven pulley and tensioner arm for the drive system are calculated and compared well with experimental data, which validates the presented hysteretic model.

Keywords: automatic tensioner; dynamic characteristics; experimental analysis; modelling; hysteresis; pulley-belt drive systems; dynamic stiffness; loss angle; pre-torque; excitation amplitude; excitation frequency; spring stiffness; damping coefficient; moment of inertia; tensioner arm; torque; angular displacement; least-squares method.

DOI: 10.1504/IJVNV.2014.065635

International Journal of Vehicle Noise and Vibration, 2014 Vol.10 No.4, pp.302 - 314

Available online: 31 Oct 2014 *

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