Patent ID: 6826467
Filing Date: 2004-11-30
Classification: F16H,Y10T

Abstract:
An abnormality detecting apparatus for an automatic speed changer, comprising:a speed change controlling means for controlling the automatic speed changer; a learn controlling means for optimizing an rpm change at the time of speed change control by said speed change controlling means; a learned value change supervision controlling means for supervising a change in the learned value of said learn controlling means, counting up a learned value non-change counter if there is no change in the learned value, and storing the learned value as converged when the value of said learned value non-change counter is not less than a predetermined value; and an abnormality detection controlling means for storing that the condition is abnormal when the learned value is changed again after the judgement that the learned value change has been once converged by said learned value change supervision controlling means, wherein said abnormality detection controlling means is adapted to set a threshold value after the convergence in a case where a predetermined threshold value after the convergence has not been set, while in a case where the threshold value after the convergence has been set, said abnormality detection controlling means stores that the condition is abnormal when the current learned value exceeds the set threshold value after the convergence.