Apparatus for calculating filling time of automatic transmission and control method thereof

1. An apparatus for calculating a filling time of an automatic transmission, comprising:

an oil temperature detection unit for detecting an oil temperature of a transmission oil;

a control duty input unit for receiving a control duty for controlling a solenoid valve that discharges or fills the transmission oil supplied from an oil pump from or to an oil flow path corresponding to a gear shifting stage to form a hydraulic pressure;

a storage unit for storing a filling time table in which a relationship between a remaining flow and a filling time according to the oil temperature is mapped; and

a calculation control unit for receiving the control duty of the solenoid valve from the control duty input unit to calculate the remaining flow on the basis of a variation interval of the remaining flow and an elapsed time, and calculating the filling time depending on the filling time table stored in the storage unit on the basis of the remaining flow.

2. The apparatus of claim 1 , wherein the variation interval of the remaining flow includes at least one of an interval in which the remaining flow is decreased, an interval in which the remaining flow is increased, and an interval in which the remaining flow is maintained.

3. The apparatus of claim 1 , wherein if the setting time has elapsed after the control duty enters the variation interval of the remaining flow, the calculation control unit calculates the remaining flow by adding or subtracting a setting flow to or from a previous remaining flow.

4. The apparatus of claim 3 , wherein the setting time and the setting flow are determined depending on the oil temperature and the control duty.

5. A control method for an apparatus for calculating a filling time of an automatic transmission, comprising:

receiving a control duty for controlling a solenoid valve from a control duty input unit and an oil temperature of a transmission oil from an oil temperature detection unit, respectively, by a calculation control unit;

determining a variation interval in which a remaining flow is included for the control duty, and measuring an elapsed time after the control duty enters the determined variation interval, by the calculation control unit;

calculating the remaining flow on the basis of the variation interval of the remaining flow according to the control duty and the elapsed time, by the calculation control unit; and

calculating a filling time according to a filling time table stored in a storage unit on the basis of the remaining flow, by the calculation control unit.

6. The method of claim 5 , wherein in the determining a variation interval in which a remaining flow is included, the variation interval of the remaining flow includes at least one of an interval in which the remaining flow is decreased, an interval in which the remaining flow is increased, and an interval in which the remaining flow is maintained.

7. The method of claim 5 , wherein in calculating the remaining flow, if the setting time has elapsed after the control duty enters the variation interval of the remaining flow, the calculation control unit calculates the remaining flow by adding or subtracting the setting flow to or from the previous remaining flow.

8. The method of claim 7 , wherein the setting time and the setting flow are determined depending on the oil temperature and the control duty.