Method of adjustment of clutch characteristic curve
A method for adjusting a clutch characteristic curve, including obtaining a torque-stroke learning value for adjusting the clutch characteristic curve, calculating a convergence value for each control point of the clutch characteristic curve, calculating a difference value between the convergence value and a characteristic curve value for each control point, and determining a new characteristic curve value of each control point according to whether a maximum value of the calculated difference values exceeds a preset reference value.
1. A method for adjusting a clutch characteristic curve, comprising:
obtaining a torque-stroke learning value for adjusting the clutch characteristic curve;
calculating a convergence value for each control point of the clutch characteristic curve;
calculating a difference value between the convergence value and a characteristic curve value for each control point; and
determining a new characteristic curve value of each control point according to whether a maximum value of the calculated difference values exceeds a preset reference value,
wherein the determining the new characteristic curve for each control point comprises calculating the new characteristic curve value for each control point based on a preset step size when the maximum value of the calculated difference values exceeds the preset reference value, and
wherein the calculating the new characteristic curve value for each control point comprises calculating a new characteristic curve value based on a value obtained by multiplying the step size by a ratio of the change value of the corresponding control point to the change value of the control point at which the difference value is the maximum value, for each control point.
2. The method for adjusting the clutch characteristic curve of claim 1 , wherein
the calculating the new characteristic curve value for each control point comprises calculating a new characteristic curve value by using the following Equation 1.
Pos crv [k]= min(max( A, B ),max( Pos crv/old [k], Pos dc [k] )) (Equation 1)
A= min( Pos crv/old [k], Pos dc [k] )
B=Pos crv/old [k]+Wgt ftr/step [k]×Pos ftr/step
Wgt ftr/step [k]=ΔPos ftr [k]÷ΔPos ftr/max
where, Pos crv [k] is a new characteristic curve value of the k-th control point, Pos crv/old [k] is a characteristic curve value of the k-th control point, Pos dc [k] is a convergence value of the k-th control point, Pos ftr/step represents a step size, ΔPos ftr [k] is a change value of the k-th control point, and ΔPos ftr/max is a change value of the control point in which a difference value between the convergence value and the characteristic curve value is the maximum value.
3. The method for adjusting the clutch characteristic curve of claim 1 , wherein
the determining the new characteristic curve for each control point further comprises
determining a convergence value for each control point as a new characteristic curve value when the maximum value of the calculated difference values does not exceed the preset reference value.
4. The method for adjusting the clutch characteristic curve of claim 1 , further comprising
after the determining the new characteristic curve for each control point,
updating the clutch characteristic curve based on the new characteristic curve value of each control point.