FAILURE DETERMINATION DEVICE FOR HYBRID VEHICLES AND FAILURE DETERMINATION METHOD THEREFOR

摘要

An integrated controller determines whether or not the temperature of a second clutch has exceeded an upper limit temperature, on the basis of the difference in rotation speed in the second clutch, and, if a determination is made that the temperature of the second clutch exceeds the upper limit temperature, cuts drive force (high-temperature protection processing) such that the torque that is input to the second clutch from an engine and an MG is zero. In addition, the integrated controller determines second clutch engagement failure on the basis of the rotation speed difference in the second clutch and, while a second clutch engagement failure has been determined, does not cut drive force by using high-temperature protection processing.