valve gear

American

noun

(in a reciprocating engine) the mechanism for opening and closing the valves at certain points in each stroke.

valve gear British

noun

a mechanism that operates the valves of a reciprocating engine, usually involving the use of cams, pushrods, rocker arms, etc

"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

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valve gear

The Valve Gear.—We may now attend to the valve gear.

From Things To Make by Williams, Archibald

The steam ports are short, and the engine runs steadier at high speeds, while with Joy's valve gear much larger cylinders can be got in than with the link motion.

From Scientific American Supplement, No. 458, October 11, 1884 by Various

Illustrations of various valves and valve gear with their principles of operation are given.

From Aviation Engines Design?Construction?Operation and Repair by Pag?, Victor Wilfred

Q. Give a brief explanation of the Walschaert valve gear.

From The Traveling Engineers' Association To Improve The Locomotive Engine Service of American Railroads by Anonymous

This mechanism, as a whole, may also be called, and is sometimes called, the valve gear, because it is the mechanism or gear that operates the slide valve.

From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua

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