What is the composition and working principle of the ignition system?

The ignition system consists of power supply (battery or generator), ignition coil, distributor, spark plug, ignition switch and control circuit. Principle: When the engine is running, the contacts of the circuit breaker are constantly opened and closed. When the contacts of the circuit breaker are closed, the current of the battery starts from the positive pole of the battery and flows back to the negative pole of the battery through the ignition switch and the primary winding of the ignition coil. More details are as follows: 1. The automobile ignition system is a spark ignition engine. In order to make the spark plug work normally, high-voltage electricity with enough energy (about 15000 ~ 30000 V) is regularly supplied to the spark plug according to the ignition sequence of each cylinder, so that the spark plug can generate enough sparks to ignite the combustible mixture. 2. Working principle: Turn on the ignition switch and the engine will start running. During the operation of the engine, the cam of the circuit breaker keeps turning, which makes the contacts of the circuit breaker keep opening and closing. When the contacts of the circuit breaker are closed, the current of the battery starts from the positive pole of the battery and flows back to the negative pole of the battery through the ignition switch, the primary winding of the ignition coil, the movable contact arm of the circuit breaker, the contacts and the distributor housing. 3. When the contact of the circuit breaker is pushed away by the cam, the primary circuit is cut off, the current in the primary winding of the ignition coil rapidly drops to zero, and the magnetic field around the coil and in the iron core also rapidly decays or even disappears, so the induced voltage is generated in the secondary winding of the ignition coil, which is called secondary current, and the loop through which the secondary current flows is called secondary circuit.