To understand the starting principle, you mainly need to know how the engine ignites!
The ignition system of a car mainly consists of a battery, a generator, an ignition switch, an ignition coil, a capacitor, a distributor (circuit breaker and distributor), spark plugs, high voltage wires and additional resistors.
The ignition coil is composed of a primary coil (low voltage part) and a secondary coil (high voltage part). The ignition switch, circuit breaker and capacitor are connected to the primary coil. Distributors, high voltage wires and spark plugs are connected to the secondary coil.
When the piston of a certain cylinder reaches the end of the compression stroke, the distributor head in the distributor simply turns towards the side electrode connected to the spark plug of that cylinder. At this time, the contact of. LThe circuit breaker also opens. The high-voltage electricity induced by the secondary circuit flows to the spark plug through the spark plug, side electrode and high-voltage wire, producing an electric spark.
Under normal engine operating conditions, the generator powers the battery and the power system; if the power consumption is large, the battery and generator jointly provide power when the engine starts; The generator cannot produce electricity, it is powered by the battery.
A battery is similar to an energy conversion device. During charging, electrical energy is converted into chemical energy and stored. When electricity is used, the stored chemical energy is converted into electrical energy.
The distributor consists of a circuit breaker, a distributor, a capacitor and an ignition advance adjustment.
The foThe function of the circuit breaker is to periodically connect and disconnect the primary circuit, so that a high voltage is induced. in the secondary circuit. Its main part is a pair of contacts. One is fixed and the other is active. These two contacts are usually permanently closed, and the moving contact opens and closes with the rotation of the engine crankshaft.
The function of the distributor is to distribute high voltage electricity to the spark plugs of each cylinder in turn according to the operating sequence of each cylinder of the engine. It consists of a distributor cover and a distributor wire.
The device that generates electrical sparks in the automobile ignition system is the spark plug. Spark plugs withstand high pressure, high intensity load, chemical corrosion and heat load, and operate in an environment with high alternating frequencye of cold and heat. Its electrodes and skirt are corroded by high temperature gases, so its electrodes must be made of materials with good thermal conductivity, high temperature resistance and high corrosion resistance.
I n I don't need to mention the others, i.e. the clutch and the principle of the gasoline engine!