Noun
English Wikipedia has an article on:wastegateWikipedia
wastegate (plural wastegates)
(mechanical engineering, automotive, aviation) A valve that allows exhaust gases to bypass an engine's turbocharger, in order to keep from overspeeding the turbocharger rotor or driving the boost pressure high enough to risk engine knocking or detonation.
A free floating turbocharger is the simplest type of turbocharger. citation This configuration has no wastegate and can’t control its own boost levels. Source: Internet
As the aircraft climbs and the air density drops, the wastegate must continuously close in small increments to maintain full power. Source: Internet
In contrast, modern turbocharger systems use an automatic wastegate, which controls the manifold pressure within parameters preset by the manufacturer. Source: Internet
In manually controlled wastegate systems, the pilot must take care not to overboost the engine, which causes detonation, leading to engine damage. Source: Internet
In systems using a manually operated wastegate, the pilot must be careful not to exceed the turbocharger's maximum rpm. Source: Internet
Later systems utilized an adjustable wastegate, controlled either manually by the pilot or by an automatic hydraulic or electric system. Source: Internet