Self-adaptive engine exhaust temperature management control method

The invention relates to the technical field of engine control systems, and discloses a self-adaptive engine exhaust temperature management control method, which comprises the following steps: in an engine pedestal development process, completing calibration work of an engine in a normal operation mode according to a development target, and according to a pedestal WHTC cycle emission target exhaust temperature, completing the engine exhaust temperature management control. A plurality of exhaust heat management modes with different exhaust temperature targets are developed, the exhaust temperature average value is set on the basis of WHTC circulation, the temperature increasing effect of all the exhaust heat management modes is sequentially increased, and temperature limiting values are set for each exhaust heat management mode to serve as the entering temperature and the exiting temperature of the exhaust heat management mode; and the SCR inlet predicted temperature is compared with the entering temperature a