BCD-15 ANALYSIS AND PREDICTION OF A PULLEY TENSIONER EFFECT ON THE BEHAVIOR OF AN AUTOMOTIVE TIMING BELT DRIVE(BELT AND CHAIN DRIVES)

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概要

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• New developments in the automotive timing belt drives have led to the use of automatic tensioner in order to reduce the span tension variations and therefore to increase the belt durability. The objective of this work is to predict and analyze the dynamic behavior of the entire timing belt drive studied versus the running time, the crankshaft instantaneous speed and the camshaft torque. A non-linear model has been developed which describes instantaneous pulley rotations, belt span tensions and the tensioner pulley arm rotation. The timing belt drive is composed of three pulleys and a spring-loaded tensioner pulley with dry friction. The tensioner is modeled with an equivalent measured viscous damping coefficient and a rotational spring stiffness. A test rig has been designed in order to measure the rotational stiffness and the damping of the pulley tensioner. The model has already been validated by experiments in the case of an idler instead of an automatic belt tensioner. First simulations were performed with no viscous damping coefficient for the tensioner. Damping has been introduced in the tensioner model in a second time. The calculation results allow to identify the pulley tensioner effects when compared to those obtained with and idler instead of the tensioner. Belt span tensions, pulley speeds, and pulley transmission errors are studied. The tensioner pivot position in the timing belt drive lay out is analyzed versus the tensioner effectiveness. Numerical results show how the tension fluctuations in the tight span can reduce by changing the tensioner pivot position. A parametric study has been performed on the behavior of the pulley tensioner by making varying the rotational stiffness, the viscous damping coefficient, the pulley mass and the crankshaft speed. Finally, some design rules for timing belt layout with automatic tensioner can be deduced in order to optimize the behavior of the drive.

• 2001-11-15

著者

• Manin Lionel

  Laboratoire C. A. S. M. Institut National Des Sciences Appliquees

• Play Daniel

  Laboratoire Conception Et Analyse De Systemes Mecaniques National Institute Of Applied Sciences In L

• POTINET Laurence

  Laboratoire C. A. S. M., Institut National des Sciences Appliquees

• SOLEILHAC Patrick

  Laboratoire C. A. S. M., Institut National des Sciences Appliquees

• Potinet Laurence

  Laboratoire C. A. S. M. Institut National Des Sciences Appliquees

• Soleilhac Patrick

  Laboratoire C. A. S. M. Institut National Des Sciences Appliquees

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• BCD-15 ANALYSIS AND PREDICTION OF A PULLEY TENSIONER EFFECT ON THE BEHAVIOR OF AN AUTOMOTIVE TIMING BELT DRIVE(BELT AND CHAIN DRIVES)
• BCD-14 DETERMINATION OF TIMING BELT PERFORMANCES FOR INDUSTRIAL APPLICATIONS(BELT AND CHAIN DRIVES)

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