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push rod - translation to russian
![1894 prototype overhead valve [[Diesel engine]]](https://commons.wikimedia.org/wiki/Special:FilePath/Experimental Diesel Engine.jpg?width=200 "1894 prototype overhead valve [[Diesel engine]]")
общая лексика
нажимная штанга
нефтегазовая промышленность
толкатель, толкающая штанга
общая лексика
верхнеклапанный
Definition
Wikipedia
An overhead valve (OHV) engine, sometimes called a pushrod engine, is a piston engine whose valves are located in the cylinder head above the combustion chamber. This contrasts with earlier flathead engines, where the valves were located below the combustion chamber in the engine block.
Although an overhead camshaft (OHC) engine also has overhead valves, the common usage of the term "overhead valve engine" is limited to engines where the camshaft is located in the engine block In these traditional OHV engines, the motion of the camshaft is transferred using pushrods (hence the term "pushrod engine") and rocker arms to operate the valves at the top of the engine. However some designs have the camshaft in the cylinder head but still sit below or alongside the valves (the Ford CVH and Opel CIH are good examples), so therefore are strictly speaking overhead valve designs.
Some early intake-over-exhaust engines used a hybrid design combining elements of both side-valves and overhead valves.
