Poppet valve meaning

Poppet valve definition

A valve structure consisting of a circular head with an elongated stem attached in the center, very much like the shape of a mushroom with a flat top. It is designed to open and close a circular hole or port . Its name comes from the fact that it pops up and down. In engines, it is the valve used to open and close the valve port entrances to the engine cylinders .

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Automotive terms beginning with "P", page 21

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