Method and apparatus for detecting touch point of clutch
Disclosed are a method and an apparatus for detecting a touch point of a clutch and the method includes: maintaining a touch point of the clutch; correcting a setting value for determining a lowest value by calculating drag torque using a speed and an acceleration of a input shaft to change a detection range of the touch point; setting the lowest value of the speed of the input shaft within the changed detection range of the touch point to a reference value of the input shaft after actuating the clutch; releasing the clutch when the speed of the input shaft is more than a value acquired by adding the reference value of the input shaft and the corrected setting value for determining the lowest value; and updating the touch point as a clutch position matched to the reference value.
1. A method for detecting a touch point of a clutch, the method comprising:
calculating drag torque using a speed and an acceleration of an input shaft to change a detection range of the touch point;
determining a lowest value of the speed of the input shaft within the changed detection range of the touch point;
setting the lowest value to a reference value of the input shaft; and
updating the touch point as a clutch position matched to the reference value.
2. The method of claim 1 , further comprising:
releasing the clutch when the speed of the input shaft is greater than a value acquired by adding the reference value of the input shaft and a corrected setting value for determining the lowest value.
3. The method of claim 1 , further comprising:
correcting a setting value for determining the lowest value.
4. The method of claim 1 , wherein an upper limit value of the clutch position is changed through the setting value when the lowest value is changed.
5. The method of claim 4 , wherein the upper limit value of the clutch position is proportional to the setting value for determining the lowest value.
6. The method of claim 1 , wherein the updated touch point is a value acquired by subtracting a touch point offset value from an upper limit value of the clutch position corresponding to a corrected setting value for determining the lowest value.
7. The method of claim 6 , wherein the touch point offset value is proportional to a slope of the touch point.
8. An apparatus for detecting a touch point of a clutch, the apparatus comprising:
a engine speed sensor configured to sense a speed and an acceleration of an input shaft; and
a clutch control module configured to:
calculate drag torque using a speed and an acceleration of an input shaft to change a detection range of the touch point;
determine a lowest value of the speed of the input shaft within the changed detection range of the touch point;
set the lowest value to a reference value of the input shaft; and
update the touch point as a clutch position matched to the reference value.
9. The apparatus of claim 8 is further configured to release the clutch when the speed of the input shaft is greater than a value acquired by adding the reference value of the input shaft and a corrected setting value for determining the lowest value.
10. The apparatus of claim 8 is further configured to correct a setting value for determining the lowest value.
11. The apparatus of claim 8 , wherein an upper limit value of the clutch position is changed through the setting value when the lowest value is changed.
12. The apparatus of claim 11 , wherein the upper limit value of the clutch position is proportional to the setting value for determining the lowest value.
13. The apparatus of claim 8 , wherein the updated touch point is a value acquired by subtracting a touch point offset value from an upper limit value of the clutch position corresponding to a corrected setting value for determining the lowest value.
14. The apparatus of claim 13 , wherein the touch point offset value is proportional to a slope of the touch point.