What are the three types of engine lubrication methods?

[ColtonLee]

There are three types of engine lubrication methods: pressure lubrication, splash lubrication, and gravity lubrication. Below is relevant information: Splash lubrication: This method utilizes oil droplets splashed by rotating components such as the crankshaft and camshaft during engine operation, or oil sprayed from oil holes on the connecting rod big end, to lubricate friction surfaces. It primarily lubricates cylinder walls, cams, piston pins, etc. Periodic lubrication: This method involves regular application of grease for lubrication. It mainly lubricates components such as generators, starters, and water pump bearings. Pressure lubrication: This method uses an oil pump to deliver lubricating oil under pressure to the friction surfaces of components, forming an oil film of sufficient thickness to withstand mechanical loads, ensuring reliable lubrication. It primarily meets the lubrication needs of high-speed and heavily loaded components in the engine.