A piston is a cylindrical plunger that moves within a metal cylinder through the four strokes of the engine cycle: intake, compression, power and exhaust. While their motion is predicated on other engine parts and the mixture of air and fuel, the motion of a piston is central to the functioning of an engine.Know More
The following process describes how a piston works in a standard four-stroke engine. During the intake stroke, the piston is pulled down by the crankshaft. While this is happening, the inlet valve opens and allows fuel and air to mix. For the compression stroke that follows, the inlet valve closes and the piston moves back up the cylinder to compress the mixture of fuel and air. During the power stroke, the spark plug ignites the fuel and air mixture, which pushes the piston back down. For the final phase, the exhaust stroke, the outlet valve opens. Powered by the crankshaft, the piston is pushed back up the cylinder. This forces exhaust gases out the outlet pipe.
Piston rings are essential to the functioning of a piston, as they provide a seal between the piston and the cylinder to facilitate better motion. These parts also prevent leaking between the compression and sump compartments.Learn more about Motion & Mechanics
"Swept volume" is defined as the volume of fluid through which a piston or plunger moves when it makes a stroke in an engine, according to Oxford Dictionaries. The swept volume times the number of cylinders in an engine is known as the displacement, usually measured in liters. Calculating the swept volume is done by multiplying pi times the radius squared times the height of the chamber.Full Answer >
A radial piston pump is a hydraulic pump with rotating pistons that spin symmetrically around a central drive shaft. The pistons are pressed in and out of cylinders surrounding the main shaft rotor as the block rotates, effectively creating a pump function.Full Answer >
A piston engine, also known as a reciprocating engine, works by expanding hot gases (a mixture of air and fuel) within a cylinder in order to push a piston, which in turn rotates a crankshaft and generates power. Unlike early steam engines, modern piston engines do not require an external source of hot gases, hence they are known as internal combustion engines.Full Answer >
A hand pump works on the principle of displacement applied through the use of a piston and sucker rods that help to lift water out from the bottom. Water displacement occurs when pressure is applied on the piston and sucker rods manually using the handle of the pump.Full Answer >