T-S curve correction method for clutch system
A T-S curve correction method for a clutch system may include: detecting differences between actual positions of a clutch in first and second torque regions and a position on a T-S curve; determining whether the difference between the actual position in the first torque region and the position on the T-S curve is equal to or more than a first reference value; determining whether the difference between the actual position in the second torque region and the position on the T-S curve is equal to or less than a third reference value, when the difference of the actual position in the first torque region is equal to or more than the first reference value; and correcting the slope of the T-S curve in the increasing direction, when the difference of the actual position in the second torque region is equal to or less than the third reference value.
1. A T-S (Torque-Stroke) curve correction method for a clutch system, comprising:
detecting, by a controller, differences between actual positions of a clutch in first and second torque regions and a position on a T-S curve;
determining, by the controller, whether the difference between the actual position in the first torque region and the position on the T-S curve is equal to or more than a first reference value;
determining, by the controller, whether the difference between the actual position in the second torque region and the position on the T-S curve is equal to or less than a third reference value, when the difference between the actual position in the first torque region and the position on the T-S curve is equal to or more than the first reference value;
correcting, by the controller, a slope of the T-S curve to be increased from a current slope of the T-S curve with a predetermined amount, when the difference between the actual position in the second torque region and the position on the T-S curve is equal to or less than the third reference value; and
controlling, by the controller, a stroke of an actuator, based on the T-S curve with the corrected slope so that the clutch transmits a target torque from an engine, the actuator changing a position of the clutch,
wherein the first torque region is a preset torque region in which the clutch transmits a torque less than a predetermined torque, and the second torque region is a preset torque region in which the clutch transmits a torque equal to or higher than the predetermined torque.
2. The T-S curve correction method of claim 1 , further comprising:
determining, by the controller, whether the difference between the actual position in the first torque region and the position on the T-S curve is equal to or less than a second reference value, when the difference between the actual position in the first torque region and the position on the T-S curve is less than the first reference value;
determining, by the controller, whether the difference between the actual position in the second torque region and the position on the T-S curve is equal to or more than a fourth reference value, when the difference between the actual position in the first torque region and the position on the T-S curve is equal to or less than the second reference value; and
correcting, by the controller, the slope of the T-S curve to be decreased from the current slope of the T-S curve with a predetermined amount when the difference between the actual position in the second torque region and the position on the T-S curve is equal to or more than the fourth reference value.
3. The T-S curve correction method of claim 1 , wherein a second reference value is additionally used as a reference value for comparing the actual position in the first torque region to the position on the T-S curve, in addition to the first reference value.
4. The T-S curve correction method of claim 3 , wherein the first and second reference values are set to the same value in the first torque region.
5. The T-S curve correction method of claim 1 , wherein a fourth reference value is additionally used as a reference value for comparing the actual position in the second torque region to the position on the T-S curve, in addition to the third reference value.
6. The T-S curve correction method of claim 5 , wherein the third and fourth reference values are set to the same value in the second torque region.