US 11,846,330 B2 · Method for defining a clutch slipping point position

Abstract

The present disclosure relates to a method for defining a clutch slipping point position (Xsp) of a clutch in a gearbox comprising an input shaft arranged to be braked by a braking means. The method includes determining if the clutch is dragging when the clutch is fully disengaged. The method includes when it is determined that the clutch is dragging, applying the braking means with a predetermined brake torque (Tb) and so that the input shaft is not rotating; and thereafter: moving the clutch from the fully disengaged position towards an engaged position; determining when the input shaft starts to rotate with a predetermined rotation value indicative of a rotational speed of the input shaft; registering a clutch position (Xb) in which the clutch is positioned when the predetermined rotation value is reached; using a clutch transfer characteristics of the clutch, Tb, and Xb to define the clutch slipping point position (Xsp).

Claims17

Dependent claims

A method for defining a clutch slipping point position (Xsp) of a clutch in a gearbox, wherein the gearbox comprises an input shaft and wherein the input shaft is arranged to be braked by a brake, the method comprising:

determining if the clutch is dragging when the clutch is fully disengaged;
when it is determined that the clutch is dragging, applying the braking means with a predetermined brake torque (Tb) and so that the input shaft is not rotating;
and thereafter:
moving the clutch from the fully disengaged position towards an engaged position;
determining when the input shaft starts to rotate with a predetermined rotation value indicative of a rotational speed of the input shaft;
registering a clutch position (Xb) in which the clutch is positioned when the predetermined rotation value is reached;
using a clutch transfer characteristics of the clutch, the predetermined brake torque (Tb) and the registered clutch position (Xb) to define the clutch slipping point position (Xsp).

4 more elements

A control unit for a gearbox comprising an input shaft (3) and a clutch for the input shaft, and wherein the input shaft is arranged to be braked by a brake, wherein the control unit is configured to:

determine if the clutch is dragging when the clutch is fully disengaged;
when it is determined that the clutch is dragging, issue a first signal to apply the braking means with a predetermined brake torque (Tb) and so that the input shaft is not rotating;
and thereafter:
issue a second signal to move the clutch from the fully disengaged position towards an engaged position;
determine when the input shaft starts to rotate with a predetermined rotation value indicative of a rotational speed of the input shaft;
register a clutch position (Xb) in which the clutch is positioned when the predetermined rotation value is reached;
and
use a clutch transfer characteristics of the clutch, the predetermined brake torque (Tb) and the registered clutch position (Xb) to define the clutch slipping point position (Xsp).

5 more elements

Dependencies are inferred from the claim text.

Method for defining a clutch slipping point position

Life of this patent

Method for defining a clutch slipping point position

Life of this patent

Abstract

Claims17