Protection method and protection device for engine and engine supercharger

The invention provides a protection method and a protection device for an engine and an engine supercharger. The protection method for the engine supercharger comprises the following steps that: a first set supercharge pressure data acquired from a pressure-temperature sensor on an air inlet tube of the engine is preset to a pressure warning value, a second set supercharge pressure data acquired from the pressure-temperature sensor is preset to a torsional limit value; the supercharge pressure data of the pressure-temperature sensor is acquired in real time when the engine is in a stable working condition; a safety alarm instruction is sent when the supercharge pressure data achieves the pressure warning value; a torsional limit instruction is generated when the supercharge pressure data achieves the torsional limit value. According to the embodiments of the invention, the pressure value of the air inlet tube of the engine can be monitored in real time, thus guaranteeing that an alarm can ...