Briefly describe how an engine works?

[SophiaLee]

Engine working principle is: The battery provides electrical energy, under the control of the ignition switch and starter relay, the starter converts electrical energy into mechanical energy, driving the engine flywheel ring gear and crankshaft to rotate. Only when this starting cycle is completed can the engine enter self-sustaining operation. The car starting system working process: 1. Turn the ignition switch to ON position with the key, the dashboard powers on, and after several seconds the car enters ready-to-start state; 2. Turn the ignition switch to START position, connecting the battery and starting system circuit; 3. The starter relay receives power; 4. After the starter receives power, the main shaft rotates under electromagnetic force; 5. The drive gear on the starter's main shaft rotates, driving the engine flywheel and crankshaft to turn; 6. Under normal circumstances, after a brief starting process, the engine can enter automatic operation state.