Piston and its Qualities

Piston and its Qualities Points : Piston, Piston and its Qualities Piston is careful to be one of the the majority important parts in a reciprocating engine in which it helps to change the chemical power obtain by the combustion of fuel into helpful mechanical power. The reason of the piston is to give a means of conveying the growth of the gases to the crankshaft, via the connecting rod, with no loss of gas from above or oil from below. Piston is essentially a cylindrical plug that moves up and down in the cylinder. It is ready with piston rings to give a good seal flanked by the cylinder wall and piston. though the piston appear to be a easy part, it is actually quite complex from the design stand point. The efficiency and economy of the primarily depend on the working of piston. It must operate in the cylinder with minimum friction and should be able to withstand the high volatile force developed in the cylinder and also the very high temperature range from 2,000°C to over 2,800°C during operation. The piston ought to be as strong as possible; however, its weight should be minimized as far as possible in order to reduce the inertia due to its reciprocating mass.

The piston must possess the following qualities.

1. Material have low expansion and provision to allow for different expansion rates of cast iron cylinder block and aluminum piston.
2. High-quality heat conductivity to reduce the risk of detonation so allowing higher compression ratio.
3. Weightlessness to reduce the weight of the reciprocating masses and so enable higher engine speeds.
4. Strictly to withstand high pressure.
5. Silence in operation.
6. Properly formed skirt to give uniform bearing under working situation.