Engine auxiliary heat dissipation system and control method

The invention discloses an engine auxiliary heat dissipation system and a control method, and relates to the technical field of vehicle heat management, the engine auxiliary heat dissipation system comprises an engine water jacket provided with a first heat dissipation mechanism and a second heat dissipation mechanism, and the first heat dissipation mechanism is arranged on the second heat dissipation mechanism. The system has the beneficial effects that through the first heat dissipation mechanism and the second heat dissipation mechanism, the double-cavity oil tank and the low-temperature radiator are used for assisting heat dissipation, the working frequency of a high-temperature radiator engine silicone oil fan is reduced, energy conservation and consumption reduction are achieved, and when the engine water temperature T3 reaches the thermostat opening temperature t1 (90), a four-way valve is selected and controlled, and the engine temperature T3 reaches the thermostat opening temperature t1 (90). The coo