What Are the Types of Spark Plugs?
2 Answers
Spark plugs can be categorized into the following types: standard spark plugs, projected insulator spark plugs, electrode spark plugs, seat spark plugs, pole spark plugs, and surface gap spark plugs. The standard spark plug is the most widely used type. As a crucial component of a gasoline engine's ignition system, a spark plug consists of a terminal nut, insulator, terminal stud, center electrode, side electrode, and shell, with the side electrode welded to the shell. In an engine, the ignition coil is directly connected to the spark plug, which introduces high-voltage electricity into the combustion chamber and generates a spark by jumping across the electrode gap, thereby igniting the combustible air-fuel mixture in the cylinder.
There are several main types of spark plugs. Copper spark plugs are cheaper and more common, with thicker electrodes and shorter lifespan, suitable for older vehicles or short-distance driving. Iridium spark plugs offer higher ignition efficiency, with finer electrodes for stronger ignition and faster acceleration response, especially suitable for high-performance cars and long-distance driving, but they are more expensive. Platinum spark plugs strike a balance, being durable and corrosion-resistant, ideal for daily commuting and reducing maintenance frequency. Iridium-platinum alloy spark plugs combine the advantages, featuring advanced electrode design for smoother engine operation and simpler maintenance. Additionally, the heat range of spark plugs is crucial. In high-temperature engine environments, cold-type spark plugs are needed to prevent pre-ignition, while hot-type spark plugs are more stable under standard temperatures. For daily driving, regularly check the condition of spark plugs and replace them in time to avoid engine shaking or ignition failure, ensuring driving safety.
