valve gear

American  

noun

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

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valve gear British  

noun

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

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Example Sentences

See Examples For:

valve gear

The valve gear is of the regular Corliss type, driven by a single eccentric and wrist-plate.

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

The effort of the piston to rise supports the weight of the valves and valve gear.

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

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

Assuming this to be the original valve gear of the Pioneer, it must be regarded as an early application, because the Stephenson motion was just being introduced into American locomotive practice in the early 1850’s.

From The 'Pioneer': Light Passenger Locomotive of 1851 United States Bulletin 240, Contributions from the Museum of History and Technology, paper 42, 1964 by White, John H.

Both the oil for lubricating the bearings and the water for cooling the cylinders were circulated by pumps, and all parts of the valve gear, etc., were completely enclosed for protection from dust.

From A History of Aeronautics by Vivian, Evelyn Charles