What is the function of oil sump?

The oil sump, also known as the oil pan, serves as a reservoir for engine oil in an internal combustion engine. Its primary function is to store the oil that lubricates the engine components, helping to reduce friction and wear during operation. Additionally, the sump allows for the collection of debris and contaminants, which can be filtered out, ensuring clean oil circulation throughout the engine. It also aids in cooling the oil as it circulates back through the engine.