Patent ID: 7908070
Filing Date: 2011-03-15
Classification: B60K,F16D

Abstract:
1. Method for controlling a coupling device between an input shaft driven by a motor and an output shaft that can transmit a maximum torque based on the position of an actuator of the coupling device, in accordance with a time-dependent law of behavior of the coupling means according to which, at each instant: a setpoint is defined for maximum torque to be transmitted; the actual position of the actuator of the coupling device is measured; using the setpoint for maximum torque to be transmitted the actual measurement of the position of the actuator and the law of behavior of the coupling means at instant t a setpoint is determined for the coupling device actuator, which is sent to the coupling device actuator, wherein: the law of behavior of the coupling means at instant t is obtained by interpolating between a first reference law of behavior for the coupling means and at least one second reference law of behavior for the coupling means; and self-adaptation of an interpolation result for the law of behavior of the coupling means is performed in order to take into account the a change in behavior of the coupling means in response to its use, wherein a first interpolation is performed between a first reference law and a second reference law using a first interpolation function a to determine a law of intermediate behavior at instant t, which is used to determine the law of behavior of the coupling means, and the first interpolation function is adjusted with a first gain, wherein the first reference law is the law of behavior of the coupling means when it is new and cold, and the second reference law is the law of behavior of the coupling means when it is new and warm, and wherein a second interpolation is performed between the law of intermediate behavior at instant t and a third reference law corresponding to the worn coupling device, using a second interpolation coefficient, and the second interpolation coefficient is adjusted by using a second gain that has an opposite sign to the first gain, and a low absolute value compared to the first gain.