Meaning valve overlap
What does valve overlap mean? Here you find 2 meanings of the word valve overlap. You can also add a definition of valve overlap yourself
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valve overlapperiod of time when intake and exhaust valves in a four-stroke cycle engine are open at same time.
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valve overlapThe number of degrees of duration during which both the intake and exhaust valves are open. This is what causes roughness at idle or low RPM.
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