As the piston of internal combustion engine works under the conditions of high temperature, high pressure and high load, the requirements for the piston are relatively high, so the classification of internal combustion engine piston is mainly discussed.

1. According to the fuel used, it can be divided into gasoline engine piston, diesel engine piston and natural gas piston.

2. According to the material of piston, it can be divided into cast iron piston, steel piston, aluminum alloy piston and combined piston.

3. It can be divided into gravity casting piston, squeeze casting piston and forging piston according to the process of manufacturing piston blanks.

4. According to the working conditions of pistons, they can be divided into non pressurized pistons and pressurized pistons.

5. Piston can be divided into car piston, truck piston, motorcycle piston, marine piston, tank piston, tractor piston, lawn mower piston, etc

Some engines may have abnormal piston pin noise during use. If the abnormal noise of the piston pin is serious, the piston pin bushing will be damaged, and the wear of the rod bearing bush and the crankshaft connecting rod journal will be added. When the wear is most serious, the piston pin or the top of the connecting rod will be pulled off, and the cylinder block will be damaged. Do not neglect it.