Engine ante-vortex closed loop temperature overtemperature protection control method

The invention discloses an engine ante-vortex closed loop temperature overtemperature protection control method. The engine ante-vortex closed loop temperature overtemperature protection control method comprises the steps that 1, T-Max, T-RlsOn and T-RlsOff are set in a vehicle electronic control unit, and T3 is detected in real time through a monitoring sensor and transmitted to the vehicle electronic control unit; 2, the vehicle electronic control unit judges whether T3 is greater than the activation temperature value T-RlsOn or not, if not, the closed loop control function is not activatedand operation is returned to the step 1, and if yes, the step 3 is implemented; 3, the vehicle electronic control unit activates the closed loop control function, and performance of an engine is limited, so that T3 is less than or equal to T-Max; and 4, the vehicle electronic control unit judges whether T3 is greater than T-RlsOff or not, if yes, operation is returned to the step 3 to continue closed loop control, and if