The Piston Assembly is one of the core components of the engine, responsible for converting the pressure of the combustion gas into mechanical power, which drives the engine. A typical Piston Assembly consists of the following key components:

First, the piston is a cylindrical metal member, usually made of aluminum or cast iron, that can withstand the high-pressure gases in the combustion chamber. The specific shape of the piston top is designed to accommodate different combustion chamber structures, while its ring groove is used to mount the piston ring.

Secondly, there are three main types of piston rings: gas ring, oil ring and oil scraper ring. The gas ring is located at the top of the piston, and its main function is to seal the combustion chamber, prevent gas leakage and help heat dissipation; The oil ring is located under the piston and is used to scrape excess oil from the cylinder wall to prevent oil from entering the combustion chamber; The oil scraping ring is sometimes used in combination with the oil ring to further remove the oil.

The piston pin is a small shaft that runs through the center of the piston and connects the piston to the connecting rod. Its design allows the piston pin to rotate freely within the piston, reducing wear, and is secured by a retaining ring.

The connecting rod is an important part that connects the piston and the crankshaft, converting the reciprocating motion of the piston into the rotation of the crankshaft. One end of the connecting rod is connected to the piston through the piston pin, the other end is connected to the crankshaft through the connecting rod bearing, usually made of high-strength steel, with excellent rigidity and fatigue resistance.

The piston skirt is the wider part of the lower part of the piston, which acts as a guide to ensure the linear movement of the piston in the cylinder and reduce wear caused by lateral forces. In addition, auxiliary components such as the piston pin seat and the piston top also play an important role in the overall structure.

In summary, all parts of the Piston Assembly work together to ensure efficient engine operation and long life. Regular inspection and maintenance of the condition of piston rings, piston pins and connecting rods is the key to preventing failure and extending the service life of the engine.