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Engine Friction and Lubrication topics include: Engine and mechanical friction, lubrication types and properties, classification and mechanisms of lubricating systems.
Friction is the resistance to motion caused by sliding. Lubrication is the use of fluids, gases, vapors, plastic substances, and solids to reduce friction and wear and tear between two moving surfaces.
Engines have several types of friction, including: Mechanical friction: The resistance to motion of mechanical parts in an operating engine Coulomb friction: Occurs when there is no lubrication and the force creating movement is held constant Viscous friction: Occurs when the sliding surfaces are separated by a thin film of lubrication Pumping friction: The summation of work performed during the inlet cycle and exhaust cycles
Lubrication systems in engines help reduce friction between moving parts. They provide a continuous supply of clean oil to all parts of the engine that require lubrication and ensure smooth operation.
Lubricants perform several key functions, including: Keeping moving parts apart Reducing friction Transferring heat Carrying away contaminants and debris Transmitting power Protecting against wear Preventing corrosion Sealing for gases Stopping the risk of smoke and fire of objects Preventing rust
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