süüteküünal

Süüteküünal, which translates to "spark plug" in English, is a crucial component in internal combustion engines. Its primary function is to ignite the fuel-air mixture within the combustion chamber, initiating the power stroke. This ignition is achieved by generating an electrical spark across a small gap between two electrodes.

The spark plug consists of a central electrode, typically made of copper or precious metals like platinum or iridium for improved durability and performance, surrounded by an insulator, usually made of ceramic. This insulator prevents the high voltage from short-circuiting. The outer shell of the spark plug is threaded to screw into the engine's cylinder head, and it also serves as a ground electrode.

When the ignition system sends a high-voltage pulse to the spark plug, it creates a potential difference between the central and ground electrodes. If this voltage is high enough to overcome the resistance of the fuel-air mixture, an electrical arc, or spark, jumps across the gap. This spark provides the energy needed to ignite the compressed mixture, leading to the explosion that drives the piston.

The condition of the süüteküünal significantly impacts engine performance, fuel efficiency, and emissions. Worn or fouled spark plugs can lead to misfires, rough idling, reduced power, and increased fuel consumption. Therefore, regular inspection and replacement of spark plugs are essential for maintaining an engine's optimal operation. Different engine types and operating conditions may require specific types of süüteküünlad to ensure proper ignition.