What is the Definition of Splash Lubrication?
2 Answers
Utilizing oil droplets or mist splashed by moving parts during engine operation to lubricate friction surfaces is referred to as splash lubrication. Below is an introduction to lubrication classifications and methods of lubricant supply: Lubrication Classifications: Based on the different lubricating materials between friction pairs, lubrication can be divided into fluid (liquid, gas) lubrication and solid lubrication (see lubricant). Depending on the friction state between friction pairs, lubrication is further categorized into fluid lubrication and boundary lubrication. The lubrication state between fluid lubrication and boundary lubrication is called mixed lubrication, or partial elastohydrodynamic lubrication. Methods of Lubricant Supply: The method of supplying lubricating oil or grease is crucial in design, especially for oil lubrication, as the supply method is closely related to the lubrication state of the parts during operation. Specific methods include oil lubrication, drip lubrication, oil ring lubrication, splash lubrication, pressure circulation lubrication, and grease lubrication.
In a car engine, splash lubrication refers to the process where moving parts like the crankshaft or connecting rods fling oil around to lubricate other components as they rotate. Having worked on cars for years, I find this method simple and hassle-free, which is why many older engines or small motorcycles use it—since there's no oil pump forcing oil through. However, the downside is uneven lubrication coverage, often missing tight spots like the cylinder wall friction surfaces, especially if the RPM is too high for the oil to reach properly. Additionally, when the oil gets too dirty, splash efficiency drops significantly, potentially damaging piston rings. For maintenance, I recommend checking the oil level frequently, avoiding oil that's too thick or too thin, and changing it on time to enhance engine durability. During daily driving, watch out for unusual noises, as insufficient lubrication often leads to premature wear.
