What is the working principle of the engine starting system?

[DelCorey]

The working principle of the engine starting system is: the battery provides electrical energy, under the control of the ignition switch and the starter relay, the starter converts electrical energy into mechanical energy, drives the engine flywheel ring gear and crankshaft to rotate, and the starting work can cycle, so that the engine enters the self-running state. The working process of the car starting system: 1. Turn the ignition switch to the ON position with the key, the instrument is powered on, and after a few seconds, the car enters the ready-to-start state; 2. Turn the ignition switch to the START position to connect the circuit of the battery and the starting system; 3. The starter relay is energized; 4. After the starter is energized, the main shaft rotates under electromagnetic action; 5. The drive gear on the main shaft of the starter rotates, driving the engine flywheel and crankshaft to rotate; 6. Under normal circumstances, after a brief start, the engine can enter the automatic running state.