positive valve gear

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• Desmodromic valve — In general mechanical terms, the word desmodromic is used to refer to mechanisms that have different controls for their actuation in different directions. Desmodromic poppet valve in Ducati engine. A desmodromic valve is a reciprocating engine… …   Wikipedia

• Poppet valve — A poppet valve is a valve consisting of a hole, usually round or oval, and a tapered plug, usually a disk shape on the end of a shaft also called a valve stem. The shaft guides the plug portion by sliding through a valve guide. In most… …   Wikipedia

• Double dump valve — Double dump valves, also known as double flap valves or double flap gates, are a type of airlock valve commonly used in industrial applications as a component in bulk material handling applications. Double dump valves are primarily used to… …   Wikipedia

• Kingston valve — A Kingston valve is a type of valve fitted in the bottom of a ship s fuel, water and ballast tanks. Named after its inventor John Kingston (1786 1847)an English engineer. [ Building the Steam Navy: Dockyards, Technology and the Creation of the… …   Wikipedia

• Cutoff (steam engine) — In a steam engine, cutoff is the point in the piston stroke at which the inlet valve is closed. On a steam locomotive, the cutoff is controlled by the reverser. The point at which the inlet valve closes and stops the entry of steam into the… …   Wikipedia

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• Cylinder head porting — refers to the process of modifying the intake and exhaust ports of an internal combustion engine to improve the quality and quantity of the air flow. Cylinder heads, as manufactured, are usually suboptimal due to design and manufacturing… …   Wikipedia

• Royal Enfield — Infobox Defunct Company company name = Enfield Cycle Co. Ltd. company successor = Royal Enfield Motors Ltd. (formerly Enfield of India) foundation = 1893, as Enfield Manufacturing Co. Ltd. defunct = 1970 fate = Ended production. location =… …   Wikipedia

• Honda VFR750F — Infobox Motorcycle name = VFR750P aka = manufacturer = Honda parent company = production = 1986 1997 predecessor = successor = class = engine = 750 cc liquid cooled DOHC V4 four stroke, carbureted top speed = power = torque = transmission =… …   Wikipedia

• Dry sump — A dry sump is a lubricating motor oil management method for four stroke and large two stroke piston internal combustion engines that uses external pumps and a secondary external reservoir for oil, as compared to a conventional wet sump system.… …   Wikipedia