The pistons and connecting rods on the engine are part of the crank connecting rod mechanism and together they make up the Carrier 06E piston kit. This is the part with extremely high technical content in the engine, and it has extremely high requirements on the material, metallurgical process and heat treatment of the parts, especially the piston and piston ring, which is directly related to the service life of the engine.

The main function of the Carrier 06E piston kit is to receive the combustion gas pressure, and transmit the force to the connecting rod through the piston pin and then to the crankshaft, and convert the reciprocating motion of the piston into the rotational motion of the crankshaft. It can also be subdivided into piston groups and connecting rod groups.
The main function of the piston is to withstand the pressure of the combustion gas and transmit this force to the connecting rod through the piston pin to drive the crankshaft to rotate. In addition, the top of the piston, the cylinder head and the cylinder wall together form the combustion chamber. Pistons are the toughest parts in an engine. The air force and reciprocating inertial force acting on the piston. The top of the piston is in direct contact with the high-temperature gas, so that the temperature of the top of the piston is very high. The piston slides along the cylinder wall at high speed under the action of side pressure. Due to the poor lubrication conditions, the friction loss is large and the wear is serious. Generally speaking, about 40% of the friction loss on an engine comes from the friction between the piston, piston ring and cylinder wall. Aluminium alloy pistons are widely used in modern automobile engines, whether gasoline engines or diesel engines, and cast iron or heat-resistant steel pistons are only used in very few automobile engines.
The function of the Carrier 06E piston kit is to transmit the force of the piston to the crankshaft, and convert the reciprocating motion of the piston into the rotational motion of the crankshaft. The connecting rod group is subjected to alternating loads such as compression, tension and bending during operation, so the connecting rod body may be bent and twisted. The connecting rod body and connecting rod cover are made of high-quality medium carbon steel or medium carbon alloy steel by die forging or roll forging.
The Carrier 06E piston kit, the body group and the crankshaft flywheel group together form the crank connecting rod mechanism. It is the transmission mechanism for the internal combustion engine to realize the working cycle and complete the energy conversion. It is the mechanism for the engine to generate and transmit power. The thermal energy is converted into mechanical energy, which is the energy conversion mechanism of the engine. Its working conditions are quite bad, it has to withstand high temperature, high pressure, high speed and chemical corrosion, and it has to bear a lot of gas pressure and mass inertia force of moving parts. Therefore, the material and structure requirements of the crank connecting rod mechanism are quite high. Its structure directly determines the performance and efficiency of the engine.