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a reciprocating valve

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См. также в других словарях:

  • Valve gear — The valve gear of a steam engine is the mechanism that operates the inlet and exhaust valves to admit steam into the cylinder and allow exhaust steam to escape, respectively, at the correct points in the cycle. It is sometimes referred to as the… …   Wikipedia

  • Reciprocating engine — internal combustion piston engine. E Exhaust camshaft I Intake camshaft S Spark plug V Valves P Piston R Connecting rod C Crankshaft W Water jacket for coolant flow.] A reciprocating engine, also often known as a piston engine, is a heat engine… …   Wikipedia

  • Valve guide — In most types of reciprocating engines, a valve guide is provided for each poppet valve in the cylinder head. Along with the valve spring, it serves to positively locate the valve so that it may make proper contact with the valve seat. A valve… …   Wikipedia

  • valve gear — noun : any of numerous gears by which motion is given to the valves of an engine and especially a steam engine; specifically : such a gear for a steam engine by which the cutoff may be varied while the engine is running and the engine started,… …   Useful english dictionary

  • valve clearance — In a reciprocating engine, the clearance between the end of a valve head and a rocker arm when the valve is seated …   Aviation dictionary

  • valve gear — (in a reciprocating engine) the mechanism for opening and closing the valves at certain points in each stroke. Also called valve train. * * * …   Universalium

  • valve duration — The length of time, measured in degrees of crankshaft rotation, an intake or exhaust valve in a reciprocating engine is open …   Aviation dictionary

  • valve overlap — The portion of the operating cycle of a reciprocating engine in which, when the piston is passing TDC (top dead center) on the exhaust stroke, both the intake and exhaust valves are open. Valve overlap increases the efficiency of the engine… …   Aviation dictionary

  • valve ports — The openings in the cylinder heads of a reciprocating engine through which the fuel air mixture flows into the cylinder and burned gases leave …   Aviation dictionary

  • valve gear — /ˈvælv gɪə/ (say valv gear) noun the mechanism for opening and closing the valves of a reciprocating engine …  

  • piston valve — noun 1. : a reciprocating valve consisting of a piston or connected pistons working in a cylindrical case provided with ports that are traversed by the valve 2. : piston 2a …   Useful english dictionary

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