Patent ID: 8775002

Claim:
A fail-safety control method for a hybrid vehicle, comprising: a instruction step that a hybrid control unit gives instructions to a motor control unit to generate the demand torque signal when commands for a demand torque are received from a driver; a first determining step that determines whether or not a normal demand torque signal according to the instructions from the hybrid control unit is being generated by the motor control unit; a command step that gives commands to output an interrupt signal to interrupt an operation of the motor control unit, if it is determined that an abnormal torque signal is being generated by the motor control unit; and wherein the method further comprises: a second determining step that determines whether or not the motor control unit is being operated or not after giving the commands to output the interrupt signal; a control step that a transmission control unit controls fail-safety if it is determined that the motor control unit is being operated in the second determining step; and wherein in the control step, if it is determine that the motor control unit is being operated and that there has been no breakdown in the transmission control unit, the transmission control unit controls the fail-safety; and wherein the transmission control unit controls the fail-safety by cutting off hydraulic pressure applied to a transmission valve to cutoff a power transmission.