What is the typical material of pistons used in IC engines?

Aluminium alloys are the preferred material for pistons both in gasoline and diesel engines due to their specific characteristics: low density, high thermal conductivity, simple net-shape fabrication techniques (casting and forging), easy machinability, high reliability and very good recycling characteristics.

What is the function of a piston in an internal combustion engine?

It is the moving component that is contained by 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.

Why Aluminium alloy pistons are used in an engine?

The aluminum alloy of such a composition increases the thermal conductivity without increasing the coefficient of thermal expansion, improves resistance against wear, and improves the fatigue strength of the piston reciprocating under conditions of high temperature and high speed.

Why are internal combustion engines more efficient?

Thus, the efficiency is higher because more energy is extracted from the fuel than what could be extracted by the combustion engine alone. Combined cycle power plants achieve efficiencies in the range of 50\% to 60\%.

What is the purpose of the piston skirt?

The skirt consists of space for gudgeon pin which transmits power to the connecting rod. The skirt also helps in transferring the side thrust produced by the connecting rod. The piston consists of rings grooves for fitting piston rings. The landing of piston rings is hardened and plated with chrome to reduce wear.

What are the three purposes of the piston?

The functions of the piston are as follows:

• To receive the thrust from the explosion and transmit the force to the crankshaft through’ connecting rod.
• To act as a seal so that the high combustion pressure does not escape to the crankcase.
• To serve as a guide and a bearing for the connecting rod small end.

What are the two important things to be considered while designing piston?

In designing a piston for an engine, the following points should be taken into consideration: It should have enormous strength to withstand the high pressure. It should have minimum weight to withstand the inertia forces. It should form effective oil sealing in the cylinder.

Why are internal combustion engines so inefficient?

Gasoline engines often blow more than 80\% of the energy produced out the tailpipe or lose that energy to the environment around the engine. The reasons combustion engines are so inefficient are consequences of the laws of thermodynamics. During the combustion process the fuel is oxidized (burned).

What is the main reason why we inspect piston piston ring rod and bearing?

Inspect the exterior of the piston for scores and scratches. Scores on the top ring land are not cause for rejection, unless they are excessively deep. Deep scores on the side of the piston are usually a reason for rejection.