Tehoalue

Tehoalue is a Finnish term formed from teho meaning power and alue meaning area or zone. It denotes a range or zone of power or performance within which a machine, component, or system operates or is capable of producing a certain level of output. The exact meaning depends on the context, but common themes are limits, efficiency, and performance characteristics.

In engineering and electronics, tehoalue describes the interval of output power for which a device is specified or expected to perform safely and reliably. Specifications may define a minimum and maximum power (Pmin–Pmax) within which efficiency is optimized or thermal limits are not exceeded. Operating outside the tehoalue can lead to reduced efficiency, overheating, or damage.

In automotive engineering, tehoalue often refers to the engine’s power band—the RPM range where the engine delivers its rated power or torque. Drivers experience varying performance as the engine revs through different tehoalue ranges, with peak power typically attained near a specific RPM.

In exercise science and coaching literature, tehoalueet (plural) are training zones defined by intensity, such as heart rate or power output. A single tehoalue may indicate a moderate or high-intensity range used for interval training or endurance work.

The term is widely used in Finnish technical documentation, manuals, and educational materials. Because it describes a relative performance range rather than a fixed universal value, tehoalue should be interpreted in the specific disciplinary context.