valve gear

noun

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

valve gear

noun

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

Example Sentences

In 1856, seventeen engines for nine different companies had this form of valve gear, and its use was thus incorporated in his practice.

From Project Gutenberg

The valve gear is arranged for operation either automatically or by hand.

From Project Gutenberg

The high pressure steam engine, in whatever form it exists, consists of a frame or bed plate carrying two distinct mechanisms, first, the driving or power-transmitting mechanism, and second, the valve gear or valve motion, and to these are added such other mechanisms as the nature of the duty the engine is to perform may require.

From Project Gutenberg

In the figure the parts are shown in position for the engine to go ahead, hence the reversing gear is in the extreme forward notch of the sector, and the valve gear is in full gear for the forward motion.

From Project Gutenberg

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 Project Gutenberg