Patent ID: 6730001
Filing Date: 2004-05-04
Classification: B60W,F16D,Y10T

Abstract:
A procedure for control and regulation of a clutch of an automatic stepless transmission for a motor vehicle comprising the steps of:determining in an electronic control apparatus a behavior of the clutch via one of a first regulation circuit and a second regulation circuit, whereby first and second driving conditions are provided for and the first driving condition represents a start-up process for a vehicle during a traction operation driven at a speed less than a given threshold speed value, the second driving condition represents driving above said threshold vehicle speed and a stepless change in gear ratio from a first gear ratio (i1) to a second gear ratio (i2) can be carried out, employing the first regulation circuit for the control and regulation during the first driving condition and a regulation size thereof is equivalent to an actual value of the speed of rotation of a motor (n_MOT_IST) and a second regulation circuit is used during the second driving condition and a regulation size thereof is equivalent to the actual value of a difference in the speeds of rotation (dnK_IST) of the clutch therein; subjecting the clutch to a controlled pressure during a third driving condition which represents driving below the threshold value during a compression mode, the value of which is influenced by various values, and the actual value of the difference in rotational speeds (dnK_IST) of the clutch is not set back to a zero value.