Abnormality detection device and abnormality detection method for hybrid vehicle

摘要

The abnormality detection device is detected by means for calculating a differential rotation between the rotational speed of the motor and the input rotational speed detected by the primary rotational speed sensor, and by the input rotational speed detected by the primary rotational speed sensor and the secondary rotational speed sensor. The transmission ratio calculating means for calculating the transmission ratio of the continuously variable transmission based on the output rotational speed, and when traveling with the second clutch engaged, the differential rotation is greater than a predetermined value and the transmission ratio is If it is greater than the maximum transmission ratio of the continuously variable transmission or less than the minimum transmission ratio, it is determined that the primary rotational speed sensor is abnormal, the differential rotation is less than a predetermined value, and the transmission ratio is greater than the maximum transmission ratio. Or when it is smaller than the minimum gear ratio, an abnormality detecting means for determining that the secondary rotational speed sensor is abnormal is provided.