The ignition system of an automobile is an ignition type engine that, in accordance with the ignition sequence of each cylinder, periodically supplies the spark plug with high enough energy and high voltage (about 15000——30000V), so that the spark plug generates a strong enough spark to ignite the combustible mixture.
Parking preheating means that when the engine is started in a cold state (that is, when the engine coolant does not reach the normal operating temperature).