What are the lubrication methods for an engine?

[LeTravis]

Engine lubrication methods include: 1. Splash lubrication, which utilizes oil droplets splashed by rotating components such as the crankshaft and camshaft during engine operation or sprayed from oil holes on the connecting rod big end to lubricate friction surfaces. This method primarily lubricates cylinder walls, cams, and piston pins; 2. Periodic lubrication, achieved through regular greasing, mainly servicing components like generators, starters, and water pump bearings; 3. Pressure lubrication, where an oil pump delivers pressurized lubricating oil to component friction surfaces, forming an oil film of sufficient thickness to withstand mechanical loads. This ensures reliable lubrication for high-speed and heavily loaded engine components.