What are the functions of car spark plugs?
2 Answers
Car spark plugs serve the function of introducing high-voltage electricity into the combustion chamber, causing it to jump across the electrode gap and generate a spark to ignite the combustible air-fuel mixture in the cylinder. The main types of spark plugs include: standard spark plugs, extended insulator spark plugs, electrode-type spark plugs, seat-type spark plugs, pole-type spark plugs, and surface-gap spark plugs. Spark plugs are installed on the side or top of the engine and require a working voltage of at least 10,000 volts. Common spark plug faults include: 1. Spark plug leakage; 2. Black deposits on the spark plug electrodes; 3. Cracking at the top of the insulator; 4. Oil fouling on the spark plug; 5. Spark plug erosion; 6. Excessive spark plug gap.
Spark plugs play a crucial role in a car's engine, primarily responsible for igniting the mixture of gasoline and air in the cylinders. When you start the engine, the pistons inside compress the air-fuel mixture, and the spark plug generates a high-voltage electrical spark to ignite it, causing a small explosion that drives the piston movement, ultimately making the wheels turn. If the spark plugs are worn or damaged, ignition timing may become irregular, potentially leading to difficulties in starting, rough idling, or reduced power. In severe cases, it can also increase fuel consumption and emissions. I remember when my car had these issues last time, replacing the spark plugs immediately made the engine quieter and more efficient. Moreover, good-quality spark plugs can extend the engine's lifespan—it's recommended to inspect them every few tens of thousands of kilometers. When choosing spark plug materials, copper ones are more common and affordable, while iridium ones are more durable and perform better. But don’t forget regular maintenance, as it helps avoid costly major repairs down the line and makes driving more worry-free.
