What is the function of the oil pump?
2 Answers
The function of the oil pump is to raise the oil to a certain pressure and then forcibly deliver it to the moving surfaces of various engine components. The oil pump can be structurally categorized into two types: gear-type and rotor-type. Gear-type oil pumps are further divided into internal gear-type and external gear-type, with the latter commonly referred to simply as gear-type oil pumps. Gear-type oil pumps are widely used due to their simple structure, ease of manufacturing, reliable operation, long service life, and high oil pressure capability. Rotor-type pumps have more complex rotor shapes and are often made using powder metallurgy pressing. These pumps share the same advantages as gear-type pumps but are more compact and smaller in size, leading to their increasing application in internal combustion engines.
The oil pump, I've seen plenty of them in repair work. Its main function is like the heart of the engine, responsible for drawing oil from the oil pan, pressurizing it, and pumping it to friction-prone parts such as the crankshaft, camshaft, and piston rings, providing lubrication to reduce component wear while also aiding in heat dissipation and removing impurities. If the oil pump fails, oil pressure drops quickly, leading to dry friction and overheating of parts. At best, this results in increased noise and higher fuel consumption; at worst, it can cause the engine to seize and become irreparable. I've seen many drivers spend a fortune replacing engines because of this. Prevention is simple: I recommend car owners regularly check the oil dipstick level and oil pressure gauge, especially for older cars prone to leaks and wear. Change the oil and filter every 5,000 kilometers to prevent debris from clogging the oil pump. Smooth engine operation relies entirely on its lubrication and cooling functions—don’t overlook this small but crucial maintenance task.
