What is the Piston Connecting Rod Assembly Composed of?
3 Answers
The piston connecting rod assembly consists of: piston, piston rings, piston pin, connecting rod, and connecting rod bearing. The functions of each part are: 1. Piston: It bears the gas pressure in the cylinder and transmits this force to the connecting rod through the piston pin to rotate the crankshaft, transferring the pressure of the combustion gases to the crankshaft, causing it to rotate and output power; 2. Piston rings: They ensure the seal between the piston and the cylinder wall, preventing high-temperature and high-pressure gases from entering the crankcase; 3. Piston pin: It connects the piston to the small end of the connecting rod, transmitting the gas force borne by the piston to the connecting rod; 4. Connecting rod: It connects the piston to the crankshaft, converting the reciprocating motion of the piston into the rotational motion of the crankshaft, and transmits the force borne by the piston to the crankshaft.
My old car's engine has issues, specifically with the piston connecting rod assembly. Simply put, it consists of four key components: the piston itself, which moves up and down in the cylinder like a cylinder; the connecting rod, which links to the crankshaft and transmits force; the piston pin, which connects the piston and the connecting rod; and the piston rings, which come in two types: the compression ring seals the combustion chamber, while the oil ring scrapes off excess oil. After driving the car for ten years, piston ring wear is a common problem, leading to excessive oil consumption or blue smoke. During a visit to the repair shop, I found the rings were loose, and after replacing them, the fuel consumption dropped. During regular maintenance, paying attention to cylinder compression tests and avoiding aggressive driving can significantly extend the engine's lifespan. Regular oil changes are crucial, as dirt buildup accelerates wear, and repair costs aren't cheap.
As someone who frequently works on cars, I must tell you the piston connecting rod assembly has a very clear structure: it includes the piston body, the connecting rod linked to the crankshaft, the piston pin that secures them, and the piston rings. The rings are further divided into compression rings and oil scraper rings. Each component has a specific function: the piston withstands cylinder pressure, the connecting rod transmits power, the pin ensures a rigid connection, and the rings guarantee sealing and lubrication. Common issues like loose piston pins or worn rings can cause engine noise or lack of power. I recommend car owners inspect this assembly every few tens of thousands of kilometers, especially after long trips. Cleaning the engine or using high-quality oil can reduce friction and keep these components running efficiently. Don't underestimate these parts - if the core components fail, the entire vehicle will break down.
