Expansion Stroke Of Gasoline Generator

During this process, the intake and exhaust valves are still closed. When the piston approaches the top dead center, the spark plug emits an electric spark to ignite the compressed combustible mixture. After the combustible mixture is burned, a large amount of heat energy is released. At this time, the pressure and temperature of the gas increase rapidly. The maximum pressure it can reach can reach 3-5MPa, and the corresponding temperature is as high as 2200-2800K. The high-temperature and high-pressure gas pushes the piston to move from the top dead center to the bottom dead center. The crank rotates through the connecting rod and outputs mechanical energy. In addition to maintaining the engine itself, the rest is used for external work. During the movement of the piston, the internal volume of the cylinder increases, and the gas pressure and temperature drop rapidly. At the end of this stroke, the pressure drops to 0.3-0.5MPa and the temperature is 1300-1600K.