kierroslukukäyrä

A kierroslukukäyrä, often translated as a speed-torque curve or engine map, is a graphical representation of an internal combustion engine's performance characteristics. It typically plots engine torque and power against engine speed (RPM). The torque curve shows how much twisting force the engine can produce at different RPMs. Maximum torque is often achieved in a specific RPM range, and it usually declines at higher speeds. The power curve, which is derived from torque and RPM, indicates the rate at which the engine can do work. Power generally continues to increase with RPM beyond the peak torque point, up to a certain limit. Fuel consumption and specific fuel consumption can also be represented on such diagrams, showing how efficiently the engine uses fuel at various operating points. Engine designers use kierroslukukäyrä to understand an engine's behavior, optimize its performance for different applications, and compare it with other engines. For consumers and enthusiasts, it helps in understanding an engine's "feel" and its suitability for different driving styles or vehicle types.