Lisarõhku

Lisarõhku, often translated as "additional pressure" or "boost pressure," refers to the intentional increase of pressure in an internal combustion engine's intake manifold above atmospheric pressure. This is typically achieved through forced induction systems, most commonly turbochargers or superchargers. The primary goal of lisarõhku is to increase the density of the air-fuel mixture entering the engine's cylinders. More dense air means more oxygen can be packed into the same volume, allowing for the combustion of more fuel. This, in turn, leads to a significant increase in engine power and torque output compared to a naturally aspirated engine of the same displacement.

The controlled application of lisarõhku is crucial. Excessive pressure can lead to engine damage due to increased mechanical stress and potential detonation (uncontrolled ignition). Engine control units (ECUs) in modern vehicles precisely manage boost levels using wastegates or blow-off valves to regulate the amount of exhaust gas or compressed air, thereby preventing over-boosting. Lisarõhku technology is widely used in performance vehicles, racing applications, and increasingly in mainstream vehicles to achieve higher power outputs while maintaining or improving fuel efficiency through engine downsizing. The specific amount of lisarõhku an engine can safely generate depends on its design, strength of internal components, and tuning.