| 摘要 |
PROBLEM TO BE SOLVED: To appropriately perform calibration of a sensor detecting pressure of hydraulic fluid driving an automatic transmission.SOLUTION: An amount of correction is added to an output value from a hydraulic pressure sensor, thereby generating an actually measured value of a pressure of a hydraulic fluid. When updating the amount of correction, a learning value of output from the hydraulic pressure sensor corresponding to a reference pressure is acquired based on the output value from the hydraulic pressure sensor when a predetermined condition that the pressure of the hydraulic fluid is reduced to the reference pressure is satisfied. Then, a difference between the learning value learned in the past and the learning value learned this time is multiplied by a gain, thereby acquiring the amount of correction to be subsequently used for detecting the pressure of the hydraulic fluid. When the present learning value is larger than the past leaning value, the absolute value of the gain is increased in comparison with the case that the present learning value is smaller than the past learning value. |
