A piston is an element formed by two pieces: a piston that moves in a rectilinear alternative movement and a shirt or guide to which it moves. In principle, the piston has a cylindrical shape and is usually made of metal, although it could be of any material.
The guide is actually a cavity that can be integrated into a different part. It is part of the piston-crank-crank system that serves to transform rectilinear movements into rotary and vice versa.
Function of the piston in a thermal engine
In an automotive engine, the piston is traditionally called a cylinder. The cylinder, in a car, is a cylindrical piece of steel. The movement of the piston is due to the combustion (air) of fuel at the end of the liner (gasoline in the cylinders otto or diesel in the diesel cylinders).
Operation of the piston in a thermal engine
In the case of Otto engines, a sparking spark caused by a spark plug is required. The combination of the three elements causes a controlled explosion that pushes the piston of the piston away, thus generating a movement. This movement will be transmitted to the crankshaft. The pistons are positioned alternately to the crankshaft, so that those that are pushed out push the others inwards, and then the ones that have been left in the bottom will be the ones that push the previous ones back in.
This occurs in motors that are called alternative or, more formally, alternative motion. At the end of each piston, in addition to the air and fuel inlets, the mixed combustion air outlet, and the spark plug, has grooves where the compression and lubrication segments are assembled.
The lubricant serves to decrease the frictional force of the plunger within the jacket. At the opposite end, the piston has a hole where the bolt connecting the piston to the connecting rod is housed.
Last review: November 15, 2016Back