Patent ID: 9604667
Date: 2017-03-28
CPC Classifications: B62D

Claim:
1. A method of detecting a deviation of a travel path of a vehicle, the method comprising: a first step of determining, by an electronic control unit, whether a steering torque of a driver and a motor torque of a motor driven power steering apparatus have different directions; a second step, by the electronic control unit, of determining whether the vehicle travels at a predetermined speed or higher; a third step, by the electronic control unit, of determining whether the motor torque has a predetermined magnitude or larger; and a fourth step, by the electronic control unit, of determining whether a change rate of a yaw rate is a predetermined value or less, wherein when all the first, second, third and fourth steps are satisfied, it is determined by the electronic control unit that no steering of the vehicle occurs, and it is determined by the electronic control unit that the deviation of the travel path of the vehicle is generated and a motor for the motor driven power steering apparatus is switched off by interrupting a current supplied to the motor by the electronic control unit.