Difference between revisions of "Piston"

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(New page: A piston is a component of reciprocating engines, pumps and gas compressors. It is located in a cylinder and is made gas-tight by piston rings. In an engine, its purpose is to transfer...)
 
 
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A piston is a component of reciprocating [[engines]], pumps and gas compressors. It is located in a cylinder and is made gas-tight by piston rings. In an engine, its purpose is to transfer force from expanding gas in the cylinder to the [[crankshaft]]  via a piston rod and/or [[connecting rod]]. In a pump, the function is reversed and force is transferred from the crankshaft to the piston for the purpose of compressing or ejecting the fluid in the cylinder. In some engines ([[two-strokes]]), the piston also acts as a valve by covering and uncovering ports in the cylinder wall.
[[Image:Four stroke engine diagram.jpg|thumbnail|right|Components of a typical, [[four stroke cycle]], DOHC piston engine. (E) Exhaust [[camshaft]], (I) Intake camshaft, (S) [[Spark plug]], (V) [[poppet valve|Valve]]s, '''(P) Piston''', (R) [[Connecting rod]], (C) [[Crankshaft]], (W) [[Water jacket]] for coolant flow.]]
[[Image:Piston and connecting rod.jpg|thumbnail|right|Piston and connecting rod]]
A piston is a component of reciprocating [[engines]], pumps and gas compressors. It is located in a cylinder and is made gas-tight by [[piston rings]]. In an engine, its purpose is to transfer force from expanding gas in the cylinder to the [[crankshaft]]  via a piston rod and/or [[connecting rod]]. In a pump, the function is reversed and force is transferred from the crankshaft to the piston for the purpose of compressing or ejecting the fluid in the cylinder. In some engines ([[two-strokes]]), the piston also acts as a valve by covering and uncovering ports in the cylinder wall.
 
==Oversize pistons==
*1st => std.
*2nd => 0.25mm
*3rd => 0.50mm
*4th => 0.75mm
*5th => 1.00mm
 


[[Category:Definitions]]
[[Category:Definitions]]
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