Requirements of Lubrication
Almost all machine parts of an I.C. engine have relative motion and rub against each other. The lubrication is required to reduce the rubbing action and increase the life of the engine. The purpose of lubrication in I.C. engine is generally two fold. It reduces the rubbing action between different machine parts having relative motion with each other and to carry out part of the heat generated inside the cylinder. The engine parts which are generally lubricated are listed below :
1. Cylinder and piston.
2. Main bearings
3. Big end and small-end bearings of the connecting rod.
4. Gears carrying the motion from one shaft to another shaft.
There are many other minor parts which also require lubrication as rocker arm, camshaft drive and so on.
The lubrication system is considered one of the most important systems to increase the life and for smooth working of the engine.
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