What are the functions of an automobile engine lubrication system?

[LaHarper]

The functions of an automobile engine lubrication system include lubrication and more. Below are the detailed explanations: Lubrication: Engine oil forms an oil film between moving parts, reducing friction resistance and power loss, and minimizing wear on components. Cooling: By utilizing the fluidity of engine oil, it carries away some of the heat from engine parts, preventing excessive temperatures and potential damage. Cleaning: Circulating engine oil carries away metal particles generated during engine operation, dust inhaled from the atmosphere, and some solid substances produced by fuel combustion, preventing the formation of abrasives between parts that could accelerate wear. Sealing: Using the viscosity of engine oil, it adheres to the surfaces of moving parts, enhancing the sealing effect and reducing gas leakage. Rust prevention: The lubricating oil film adheres to metal surfaces, isolating air and moisture, thereby providing rust and corrosion protection.

[NovaDella]

The lubrication system is literally the lifeline of an engine. I've seen too many cases where car owners neglected it and ended up with major overhauls. Its primary function is to form an oil film on metal surfaces, allowing high-friction components like piston rings and cylinder walls to operate smoothly and reduce wear. Engine oil also acts as a coolant, carrying heat away from high-temperature parts back to the oil pan. Even more impressively, it cleans out carbon deposits and metal particles from combustion - just like a janitor cleaning the engine's internals. Without this system, an engine would be toast before hitting 20,000 km. That's why I always check the dipstick during maintenance and insist on changing to full synthetic oil every six months as the safest practice.

[Alexa]

When it comes to the functions of the lubrication system, I've conducted actual measurement comparisons. Here's a real-world example: Two vehicles with 100,000 kilometers on the odometer—the engine that received regular lubrication maintenance looks as good as new inside, while the cylinder walls of the neglected one are covered in scratches. This system is crucial in four aspects: First, the oil pump pressurizes and delivers oil to critical components like the crankshaft and camshaft to prevent dry friction. Second, the oil film cushions impacts between parts—I've disassembled worn bearings where the surfaces had completely flaked off. Third, high-temperature components rely on oil circulation for cooling, with oil temperatures sometimes exceeding coolant temperatures. Finally, oil additives neutralize acidic combustion byproducts. Regular oil changes cost less than one-tenth of a major engine overhaul.

[IsabelMarie]

The engine lubrication system primarily addresses metal wear issues. I often explain it to friends like this: it's similar to applying grease to a bicycle chain. Inside the engine, pistons move up and down thousands of times per minute; without lubrication, the cylinders would seize within two hours. The system relies on an oil pump to create oil pressure, allowing the lubricant to flow through the main bearings and connecting rod bearings, forming a protective film that reduces friction and prevents overheating. Don't underestimate this oil film—it can withstand pressures of several hundred kilograms. The cleaning function of engine oil is crucial, especially for direct injection engines that are prone to sludge buildup. Every time I change the oil, I inspect the filter. Once, I found a significant amount of aluminum shavings, prompting me to replace the piston rings in time to avoid cylinder scoring.