centrifugal clutch

Definition

Cars & Driving

  • noun a type of clutch in which the friction elements are brought into contact with the clutch face by centrifugal force so that the clutch automatically engages and disengages at a certain speed of rotation; the term is also used for a clutch mechanism that uses centrifugal force to apply a higher force against the friction plate as the clutch turns faster
http://www.dictionarycentral.com/definition/centrifugal-clutch.html