High quality Piston rings and piston pin for engines |
Posted: April 9, 2018 |
Mostly a piston consists of three rings. The two rings at the top are responsible for performing the compression process while the lower ring is for oil control where lubrication happens. The ring is mainly of rectangular form or sometimes forms a trapezoidal cross section. For efficient working and lower maintenance of an engine Piston Rings are used. It also help is reducing frictional resistance and the leakage of steam. Depending on the type of engine rings are used for better functionality which is mostly made up of hard or brittle cast iron. For a four stroke engine three piston rings are used whereas for a two stroke engine two pins are used. These rings are loosely fitted into the cylinder because when combustion takes place, expansion happens which requires some space. If the rings are tightly fitted then there is a chance of ring getting struck to the cylinder due to expansion and this can damage the engine. Proper placement is necessary because too much gap can lead to in sufficient sealing of ring against the cylinder as a result of which leakage can take place. Placing a piston ring effectively determines the delivering power of a cylinder and this can be achieved by metal to metal sliding effect. They generally made up of alloy steel, steel wires or steel bars and acts as a link between the connecting rod and the piston. To increase the wearing chromium plated pins are also used according to the requirement. These pins are designed in a way to provide maximum strength with minimum weight. This is the reason this pins are subjected to high loads in alternating directions. Piston pin is positioned such that they do not have excessive end to end motion as this would damage the cylinder wall. Lubrication of these pins happen by a splash from the crankcase as oil is forced through drilled passages. These pins are generally categorized into three ways:
Due to high evolution and combustion pressures are subjected to stress. For this reason the pins are coated with an additional DLC layer. Piston pins when rigidly fastened into piston bosses can be secured in connecting rod. Another way to secure this pin is by clamping it to the end of the rod or let it rotate freely in both piston and rod. Energy formed from the combustion of fuel-air mixture gets transformed into kinetic energy. And are optimized carefully and are controlled in a way to avoid noise and provide high surface quality wear resistance and fatigue strength.
|
||||||||||||||||||||||||
|