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centrifugal clutch

British  

noun

  1. engineering an automatic clutch in which the friction surfaces are engaged by weighted levers acting under centrifugal force at a certain speed of rotation

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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GIF: VanMoof VanMoof’s previous two-speed automatic shifter was purely mechanical, relying on a centrifugal clutch.

From The Verge

Instead of a shift lever, there’s a motorcycle-style foot-operated gear selector for the manual transmission, which is thankfully equipped with an automatic centrifugal clutch.

From Fox News