throttleplate
nounUK /ˈθrɒtəl pleɪt/
US /ˈθrɑːtəl pleɪt/
A small round door inside a car engine that opens and closes to let air in.
When you press the gas pedal, the throttleplate opens wider to let more air into the engine.
OTHER MEANINGS
2. A flat disc that controls the flow of a fluid in a pipe by turning.
The engineer adjusted the throttleplate to slow the steam through the pipe.
3. A movable plate used to regulate the speed of an engine by limiting air or fuel.
A dirty throttleplate can make the engine idle roughly.
4. The pivoting disc inside a butterfly valve used in industrial plumbing.
They replaced the worn throttleplate in the water line.