Ketjuhihnat

Ketjuhihnat, often translated as timing chains or drive chains, are essential components in many internal combustion engines. They are responsible for synchronizing the rotation of the crankshaft and the camshaft(s). This precise timing ensures that the engine's valves open and close at the correct moments in relation to the piston's movement, which is crucial for efficient combustion, intake, and exhaust processes.

Unlike timing belts, which are typically made of rubber or a composite material, timing chains are constructed from metal links, similar to a bicycle chain. This metallic construction generally makes them more durable and longer-lasting than timing belts. They are lubricated by the engine's oil system, which further contributes to their longevity and reduces wear.

However, timing chains are not without their drawbacks. They are heavier and can be noisier than timing belts. Over time, the chain can stretch, and the tensioners and guides that keep it taut can wear out. A worn or improperly tensioned timing chain can lead to decreased engine performance, increased fuel consumption, and, in severe cases, catastrophic engine damage if the timing becomes significantly misaligned. Regular inspection and maintenance as recommended by the vehicle manufacturer are important for ensuring the proper functioning of the timing chain system.