Süstekõver

Süstekõver, which translates to "injection curve" or "surge curve" in English, is a concept primarily used in the context of internal combustion engines, particularly diesel engines. It describes the relationship between the rate at which fuel is injected into the combustion chamber and the engine's speed or load. The shape of this curve is crucial for optimizing engine performance, fuel efficiency, and emissions.

The süstekõver dictates how much fuel is delivered at different stages of the combustion cycle and at varying engine operating conditions. A well-designed süstekõver ensures that fuel is injected at an optimal rate to promote complete combustion, leading to higher power output and reduced unburnt fuel. Conversely, a poorly designed curve can result in incomplete combustion, leading to increased smoke, reduced efficiency, and potential engine damage.

Factors influencing the süstekõver include the engine's displacement, the design of the fuel injection system (e.g., common rail, unit injector), and the desired operating characteristics. Engine control units (ECUs) play a significant role in dynamically adjusting the süstekõver based on sensor inputs such as throttle position, engine speed, and air intake pressure. This dynamic adjustment allows the engine to adapt to changing demands, optimizing performance and fuel economy across a wide range of operating conditions. The study and manipulation of the süstekõver are central to modern engine development and tuning.