Põlemistsükli

Põlemistsükli refers to the cyclical process of combustion in certain internal combustion engines, particularly those operating on lean burn principles. This cycle involves a series of events that ensure efficient and controlled burning of the fuel-air mixture. The term itself, "põlemistsükli," is Estonian for "combustion cycle."

In a typical four-stroke engine, the combustion cycle is divided into intake, compression, power (combustion), and exhaust strokes. However, the term põlemistsükli often emphasizes the specific characteristics of the combustion phase itself, especially in advanced engine designs aimed at reducing emissions and improving fuel economy. This can involve carefully controlled ignition timing, the use of stratified charge to create localized rich and lean zones within the combustion chamber, or other advanced combustion strategies.

The goal of an optimized põlemistsükli is to achieve complete combustion of the fuel while minimizing the formation of harmful pollutants like nitrogen oxides (NOx) and unburned hydrocarbons. By precisely managing the events within the combustion chamber, engineers can tailor the engine's performance and environmental impact. This involves understanding the complex interplay of factors such as fuel injection timing, spark plug operation, turbulence within the cylinder, and the resulting flame propagation. Modern engine management systems continuously monitor and adjust these parameters to maintain the most efficient põlemistsükli under varying operating conditions.