venttiilijousien

Venttiilijousien, or valve springs, are essential components in internal combustion engines, particularly in poppet valve systems. Their primary function is to close the engine's intake and exhaust valves quickly and reliably after they have been opened by the camshaft. This rapid closing action ensures that the combustion chamber is properly sealed during the compression and power strokes, preventing loss of pressure and maintaining efficient engine operation.

These springs are typically made from high-strength spring steel, designed to withstand extreme temperatures, pressures, and cyclical stresses over the lifetime of the engine. The design of a venttiilijousi involves precise control of its spring rate, which is the force required to compress it by a certain amount. The spring rate, along with its free length and installed height, must be carefully matched to the valve train dynamics to prevent valve float, a condition where the valve does not fully close before the next opening event, leading to reduced performance and potential engine damage.

Multiple springs, often a inner and outer spring combination, are frequently used to improve stability and reduce the risk of resonant vibration. The overall design and material selection of venttiilijousien are critical for engine reliability, performance, and longevity.