Patent ID: 9671015
Date: 2017-06-06
CPC Classifications: B60W,B60Y,F16H

Claim:
1. An abnormality detection device for a continuously variable transmission, the abnormality detection device comprising: a setting module that sets an upper limit of torque based on an allowable input torque for the continuously variable transmission, the upper limit of torque limiting an output torque of an engine; a calculation module that determines an acceleration requested by a driver based on an amount of operation of an accelerator, obtains a running resistance of a vehicle according to the requested acceleration, and calculates a determination torque for comparison with the upper limit of torque to determine an abnormality based on the running resistance of the vehicle, a gear ratio of the continuously variable transmission, and the output torque of the engine required to generate the acceleration requested by the driver; and a determination module that determines the upper limit of torque to be abnormal in the case where the upper limit of torque set by the setting module is less than or equal to the determination torque calculated by the calculation module, wherein the calculation module obtains the running resistance by taking into account a predetermined deceleration amount representing a sudden deceleration of the vehicle.