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

A. In order to change their length to make adjustment of the valve gear not as easily made in other ways.

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

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

As the cylinder fired with every revolution, the valve gear was of the simplest construction, a fixed cam lifting each valve as the cylinder came into position.

From A History of Aeronautics by Vivian, Evelyn Charles

A. A direct motion valve gear is one in which the valve moves in the same direction as the eccentric rod, that is doing the work, in many cases no rocker arm is used.

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

Q. What is to be done if the engine breaks down other than valve gear?

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