| 摘要 |
PROBLEM TO BE SOLVED: To calculate more accurately a torque command value of an electric rotary machine by estimating the gear efficiency. SOLUTION: Number of revolutions of an axle shaft is calculated, on the basis of an inputted number of revolution of a motor and the gear ratio of a reduction gear (step 102). A demand value map in which the horizontal axis shows the number of revolution of the axle shaft and the vertical axis, shows the torque of the axle shaft, is referred to, and the torque which the axle shaft should output is calculated on the basis of an inputted acceleration opening and inputted number of revolutions of the axle shaft (step 103). A gear efficiency estimating map, which is formed at each oil temperature and shows the number of revolution of the axle shaft and the gear efficiency on the horizontal axis and on the vertical axis, respectively is referred to, and the gear efficiency is estimated on the basis of an inputted oil temperature signal of the reduction gear, the calculated number of the revolutions of the axle shaft and its torque (step 105). A motor torque command value is calculated, on the basis of the estimated gear efficiency, the torque of the axle shaft and the gear ratio (step 106). |
