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Oil Pumps
An oil pump is a pump designed to supply pressurised oil to a closed system. more...
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In automotive engineering, an oil pump is part of a lubrication system, transporting the oil to various moving parts inside the engine.;
In hydraulics, the oil pump is used to deliver mechanical energy to remote actuators via tubes, pipes and hoses.;
Internal combustion engines
In an internal combustion engine, the oil pump is usually a gear pump driven by the camshaft or crankshaft. Oil pressure varies quite a bit during operation, with lower temperature and higher RPM's increasing pressure to a maximum of about 4 bar. To ensure that the oil pressure does not exceed the rated maximum, a spring-loaded pressure relief valve routes oil back to its source once pressure exceeds a preset limit.
The oil pump usually sucks the oil out of the engine's oil pan through a wire mesh strainer and pumps the oil through an oil filter before it goes to the bearings.
Read more at Wikipedia.org
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