ABNORMALITY DIAGNOSTIC APPARATUS FOR VEHICLE

摘要

An abnormality diagnostic apparatus for a vehicle, which can accurately determine whether or not there is an abnormality in a voltage detection unit, while curtailing a cost increase, is provided. Output voltages Va, Vb, Vc outputted from voltage detection units are acquired, and differences |Va−Vb|, |Vb−Vc|, |Vc−Va| between the acquired output values are calculated. If any of the calculation results is greater than a determination threshold value, it is determined that there is an abnormality in any of the voltage detection units.

主权项

1. An abnormality diagnostic apparatus for a vehicle, comprising:
a battery loaded on a vehicle; a plurality of rotating electric machines electrically connected to the battery; a plurality of rotating electric machine control units for controlling the rotating electric machines; a plurality of voltage detection units, provided in the rotating electric machine control units, for detecting voltages of power lines connecting the battery and the rotating electric machines; a difference calculation unit for acquiring output values outputted from the voltage detection units and calculating differences between the acquired output values; and an abnormality determination unit which, when any of results of calculations by the difference calculation unit is greater than a preset determination threshold value, determines that there is an abnormality in any of the voltage detection units.