| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device of a throttle valve which improves learning accuracy more than in the conventional practice.SOLUTION: The control device of a throttle valve performs learning by defining the known maximum error amount of the opened side due to a plurality of electric factors which can cause errors in both a closed side and an opened side as a lower limit value of a negative correction amount for correcting the closed side, and also defining a value obtained by adding the known maximum error amount of the closed side due to a distortion factor of a stopper which can cause only errors of closed side to the known maximum error amount of the closed side due to the plurality of electric factors as an upper limit value to correct an initial value of a fully closed opening within the range in first learning from the first use after manufacturing or replacing the control device of a throttle valve, and does not set the lower limit value of the negative correction amount for correction in the closed side, and corrects the last learning value within the correction rane with the known maximum error amount of the closed side due to the distortion factor of the stopper as the upper limit value of the positive correction amount for correction in the opened side in a second and subsequent learning.SELECTED DRAWING: Figure 4 |
