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 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

It is situated in the steam chest, and moved by the valve gear.

From The Gutenberg Webster's Unabridged Dictionary Section S by Project Gutenberg

The chief application of the eccentric is in the steam-engine, where it is used for working the valve gear.

From An Introduction to Machine Drawing and Design by David Allan Low

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

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

This arrangement is used on account of the higher speed at which the engine is run, the regular Corliss valve gear being limited to comparatively low speeds.

From Steam Engines Machinery's Reference Series, Number 70 by Anonymous

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023