Engine net power refers to the effective power output measured at the engine's power output shaft when the engine is equipped with all accessories under actual operating conditions and operates at the speed specified by the manufacturer on the engine test bench. The difference between engine power and net power: Engine power is calculated based on engine torque and speed, being proportional to the product of the two. When the product of the two is at its maximum, the engine's maximum power is obtained; Engine net power refers to the effective power output measured at the engine's power output shaft when the engine is equipped with all accessories under actual operating conditions and operates at the speed specified by the manufacturer on the engine test bench. Engine effective power: The effective power of any engine must be less than its internal power, and the ratio of the former to the latter is the mechanical efficiency of the engine. When an engine is used to directly drive a generator to produce electricity or to operate a compressor, its effective power equals the input power of the generator or the output power of the compressor; Since the effective power of most reciprocating engines can be measured using a brake dynamometer, it is often referred to as "brake power"; The actual power output from the engine's output shaft. The unit is expressed in kilowatts (kW). That is, the power output after subtracting the friction loss power of the engine's internal moving parts, the pumping loss power during the intake and exhaust processes, and the power consumed by necessary accessories such as the oil pump and fuel pump from the engine's indicated power.
