What are the main functions of compression rings?
2 Answers
The main functions of compression rings: 1. Oil control: Evenly distribute the oil splashed or sprayed onto the cylinder wall and scrape off excess oil. The scraped oil returns to the crankcase through the gap between the piston and cylinder liner and the oil drain holes in the piston grooves; 2. Support function: The compression rings exert a frictional reaction force on the piston due to pressure, thereby providing support to the piston; 3. Heat conduction: About 70% of the heat from the piston is transferred to the cylinder wall through the compression rings, playing a dominant role in heat conduction and ensuring the thermal balance of the piston; 4. Sealing function: During the compression and power strokes, the compression rings seal the downward-moving gases.
As a veteran driver with decades of experience, I often help friends with car repairs. The compression ring is particularly important on the engine piston. Its main function is to seal the gap between the cylinder and the piston, ensuring no gas or oil leaks during engine operation. Think about it—when the engine runs, it generates high-pressure gas. If the seal isn't good, the power dissipates, the car can't run efficiently, and it might even emit blue smoke while wasting fuel. Additionally, the compression ring helps scrape off excess oil from the piston, preventing oil from entering the combustion chamber and burning, thereby extending the engine's lifespan. I remember one time when the compression rings in my car wore out, it directly caused a huge spike in fuel consumption and made starting the car difficult. After replacing the rings, things improved significantly. During routine inspections and maintenance, it's crucial to check the wear on the rings and address issues promptly; otherwise, the entire engine could be affected. These insights were passed down to me from experienced mechanics at old repair shops, and they've proven quite practical.
