Wankel engine

Wankel engine

noun
an internal-combustion rotary engine that utilizes a triangular rotor that revolves in a chamber (rather than a conventional piston that moves up and down in a cylinder): it has fewer moving parts and is generally smaller and lighter for a given horsepower.
Also called Wan·kel.


Origin:
named after F. Wankel

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World English Dictionary
Wankel engine (ˈwæŋkəl)
 
n
a type of four-stroke internal-combustion engine without reciprocating parts. It consists of one or more approximately elliptical combustion chambers within which a curved triangular-shaped piston rotates, by the explosion of compressed gas, dividing the combustion chamber into three gastight sections
 
[C20: named after Felix Wankel (1902--88), German engineer who invented it]

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