+An [Engine Valve](/wiki/engine) is a precisely timed gate within the [Cylinder](/wiki/cylinder) head, orchestrating the critical breathing of an engine. It opens to admit fresh air and fuel, then seals for combustion, and finally opens again to expel spent gases.
+## See also
+- [Camshaft](/wiki/camshaft)
+- [Piston](/wiki/piston)
+- [Internal Combustion](/wiki/internal_combustion)
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