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What does a cam do in a engine?

Cams are devices that transfer rotating motion to linear motion. As a oval shaped cam is rotated against a roller, the roller can move a lever with each revolution.

In an engine, the cams are used to lift the valves that open the inlet and exhaust ports.

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First answer by Custermen. Last edit by Custermen. Contributor trust: 678 [recommend contributor]. Question popularity: 1 [recommend question].

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