Definition
A power enrichment system is a feature in an aircraft carburetor that automatically delivers extra fuel to the engine when the throttle is opened to high power settings. The added fuel produces a richer mixture (more fuel relative to air) than the carburetor would normally meter at cruise, which helps cool the cylinders and prevents detonation during takeoff and climb.
Plain English
It is a part of the carburetor that adds extra fuel automatically when you push the throttle forward for high power. The extra fuel cools the engine and protects it from damage when it is working hardest.
Context Anchor
Seen in discussions of carburetors, fuel injection, and how aircraft engines get the correct fuel flow at different power settings.
Derivation
Enrichment comes from the Latin 'dives' (rich), through Old French 'enrichir' (to make rich). In carburetor language, a 'rich' mixture means more fuel relative to air. So an enrichment system is one that 'makes the mixture richer' on demand — automatically adding fuel when the engine needs the extra cooling and power.
Why Pilots Care
Allows safe use of full power during takeoff and climb without risking engine overheating or damage.
Grounding Statement
On takeoff, the engine is under heavy load, so the system supplies extra fuel to help protect the engine while it makes full power.
Intuition Check
“Enrichment” does not mean making the engine better in a general sense. Here it specifically means making the air-fuel mixture richer by adding more fuel compared with the amount of air.
Example Sentence 1
The power enrichment system added extra fuel as the pilot advanced the throttle for takeoff, helping keep cylinder temperatures within limits during the climb.
Example Sentence 2
During a long climb the pilot relies on the power enrichment systems to keep cylinder temperatures within limits.