What is the principle of car starting?

Principle of automobile starting system: 1. The working principle of automobile starting system is that the battery provides electric energy. Under the control of ignition switch and starting relay, the starter converts electric energy into mechanical energy, which drives the flywheel gear ring and crankshaft of the engine to rotate, thus making the engine enter a self-running state. 2. The starting circuit includes battery, ignition switch, J5 19 (vehicle power grid control unit), fuse (SB30), J682 (terminal power supply No.50), J329 (bus terminal power supply No.0/5), starter, etc. The function of the starting system is to convert the electric energy of the battery into mechanical energy through the starter to start the engine. 3. The starter is used to start the engine. When the ignition switch is in the starting position, the relay connects the main circuit of the starter, and the starter works at this time; 4. The starter consists of DC motor, transmission structure and control part. The control part, namely the electromagnetic switch, has three terminals, one of which is directly connected to the positive electrode of the battery (terminal 30), the other is connected to the switch contact of the starting relay (terminal 50), and the last one is connected to the DC motor brush (terminal C). The starter housing is grounded.