tiivistysseokset

Tiivistysseokset, also known as compression strokes or compression strokes in the context of internal combustion engines, are a critical phase in the four-stroke cycle of an engine. During this phase, the piston moves from the top dead center (TDC) to the bottom dead center (BDC), compressing the air-fuel mixture or residual gases in the cylinder. This compression increases the pressure and temperature of the mixture, facilitating efficient combustion when the spark plug ignites the fuel during the subsequent power stroke.

The compression ratio, which is the ratio of the volume of the cylinder at BDC to the volume at TDC, is a key parameter that affects engine performance. A higher compression ratio generally leads to more efficient combustion and higher power output, but it also increases the risk of engine knocking or pre-ignition, which can cause engine damage. Therefore, the compression ratio is carefully optimized based on the specific design and operating conditions of the engine.

In addition to internal combustion engines, the concept of compression strokes is also relevant in other contexts, such as refrigeration systems and air compressors, where the compression of gases is used to achieve specific thermodynamic processes. The principles of compression strokes are fundamental to the operation of these systems and contribute to their overall efficiency and performance.