Will water entering the spark plug not get into the engine?
1 Answers
Under normal rainy conditions, water will not enter the spark plug of the car unless the rain is extremely heavy, and the amount has reached the car's hood. At this point, water can enter the spark plug from under the hood. The spark plug is installed on the side or top of the engine. Early spark plugs were connected to the distributor via ignition cables, but over the past decade or so, most small car engines have switched to direct connection between the ignition coil and the spark plug. Under high voltage, the air between the center electrode and the side electrode of the spark plug rapidly ionizes, forming positively charged ions and negatively charged free electrons. When the voltage between the electrodes reaches a certain level, the number of ions and electrons in the gas increases like an avalanche, causing the air to lose its insulating properties and forming a discharge channel, resulting in a "breakdown" phenomenon. At this point, the gas forms a luminous body, known as a "spark." Along with the thermal expansion, a "crackling" sound is also produced. The temperature of this electric spark can reach 2000–3000°C, which is sufficient to ignite the air-fuel mixture in the engine's combustion chamber.