| 摘要 |
A failure detection apparatus and method of the MDPS may include a configuration that determines a failure of the MDPS in accordance with a vehicle speed, a steering torque, steering angle, a motor torque, and an estimated yaw rate, and when it is determined that the MDPS breaks down, additionally determines the type of failure. |
| 主权项 |
1. A failure detection method of a Motor Drive Power System (MDPS), comprising:
determining, by an electronic control unit (ECU) whether or not a vehicle speed is equal to or larger than a first preset value when a vehicle turns; performing, by the ECU, multiplication operation of a steering torque and a motor torque and determining whether or not an accumulation value determined by an integral for a preset time is equal to or larger than a second preset value when the vehicle speed is equal to or larger than the first preset value; determining, by the ECU, whether or not the motor torque is equal to or larger than a third preset value; determining, by the ECU, a yaw rate change rate according to the vehicle speed and a steering angle and determining whether or not the yaw rate change rate is equal to or larger than a fourth preset value; and determining, by the ECU, that the MDPS breaks down when the accumulation value is equal to or larger than the second preset value and the motor torque is equal to or larger than the third preset value and the yaw rate change rate is equal to or larger than the fourth preset value, and determining, by the ECU, that the MDPS normally operates when the accumulation value is not equal to or larger than the second preset value or the motor torque is not equal to or larger than the third preset value, or the yaw rate change rate is not equal to or larger than the fourth preset value. |
