types of lubrication system in ic engines pdf

When the engine runs, the connecting rod scoops up oil as it passes over the bottom dead center. This pan receives its oil supply from the crankcase, either using a pump or by gravity through equalizer holes drilled in the pan. Splash systemĪ dipper is provided at the bottom end of the connecting rod scoops oil out of the pan placed below the crankshaft in this system. If it is more, there will be excessive carbon deposits in the cylinder head, and the engine will also give dark smoke.

If it is less, there is a danger of insufficient lubrication causing the image to the engine. A certain amount of lubricating oil is mixed with petrol its self, the usual ratio is 2% to 3% of fuel. It is the simplest of all types of engine lubrication systems. This is generally used for small two-stroke engines, e.g., scooter and motorcycle engines. The various systems adopted for the lubrication of an engine are –

Other moving parts such as cooling fan, water pump, ignition mechanism, and so on.

The main parts of an engine which require lubrication are: Abrasive particles are dissolved into the lubricant by this process, making them also excellent solvents and cleaners. Lubricants chemically interact with all surfaces so that contact only occurs with smooth and free lubricants. A lubricant provides a protective film that allows two touching surfaces to be separated and “smoothed,” thus lessening the friction between them.

Removes the foreign material from between the engine working parts.Ī lubricant is a substance introduced between two moving surfaces to reduce the friction and wear between them.

Serves as a seal between piston rings and the cylinder wall.

Removes the heat from the piston and cylinder.

Reduces the power needed to overcome frictional resistance.

Reduces wear and prevents the seizure of rubbing surfaces.

Lubrication of the moving parts of an internal combustion engine performs the following functions: The moving parts of IC engines are required to be lubricated for proper functioning. Interposing a substance called lubricant between the surfaces to carry or help carry the load (pressure generated) between the opposing surfaces. Lubrication is the process or technique employed to reduce the wear of one or both surfaces nearby and moving relative to each other.

Types of lubrication system in ic engines pdf