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Oil Pump System: Operation Diagram Structure and Components

The oil pump is vital for circulating oil to cool, clean, and lubricate internal engine components. It is driven by the crankshaft and uses suction to draw oil from the pan through a strainer, then pushes it through a filter and cooler before returning it to the pan. Oil pumps can be directly driven by the crankshaft or use various drive systems like chains or gears to transfer power. The basic pump consists of a drive rotor within a driven rotor housing that uses their complex geometry to create suction and expel oil through intake and discharge ports, with a relief valve to prevent over-pressurization.

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4K views2 pages

Oil Pump System: Operation Diagram Structure and Components

The oil pump is vital for circulating oil to cool, clean, and lubricate internal engine components. It is driven by the crankshaft and uses suction to draw oil from the pan through a strainer, then pushes it through a filter and cooler before returning it to the pan. Oil pumps can be directly driven by the crankshaft or use various drive systems like chains or gears to transfer power. The basic pump consists of a drive rotor within a driven rotor housing that uses their complex geometry to create suction and expel oil through intake and discharge ports, with a relief valve to prevent over-pressurization.

Uploaded by

Radamir
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Oil Pump System

Operation Diagram

The oil pump is the vital component that provides the circulation of oil which cools, cleans and
lubricates internal engine components. In some engines, the oil pump also provides hydraulic
power to valve lifters and valve timing components. Driven by crankshaft power, the pump
creates suction to draw oil from the oil pan through the strainer. The suction by the pump
creates the pressure where oil is driven through the oil filter, oil cooler, internal moving parts,
provide hydraulic power, then collected back into the oil pan.

Oil Pump Oil Cooler

Oil Strainer

Oil Filter Oil Pan

Drive Systems
Various systems are utilized to transfer power from the crankshaft to the oil pump. The type of
drive system influences the configuration and location of the oil pump.

Direct Crankshaft Drive Integral Unit with W/P Chain Drive Gear Drive
(Front Module) (Integral Unit with Gear Case)

2
Introduction

Structure and Components


The basic structure of the oil pump consists of a sprocket (drive rotor) which revolves within a
housing (driven rotor). The complex geometry of the rotor and the housing creates suction.
Depending on the type of oil pump drive system, the rotor can receive power through a shaft that is
connected to a pulley, a gear, a sprocket or directly into the crankshaft. When the rotor is revolved,
oil is drawn in from the suction port and expelled into the discharge port. This process creates oil
pressure to supply oil to the moving components of the engine. A relief valve is strategically
configured in between the ports to prevent excessive pressure build-up and maintain optimal
operating oil pressure.

Oil Pump Configuration


Chain Drive / Gear Drive Rotation
Drive Rotor
Shaft Drive Rotor Shaft
Driven Rotor
Driven Rotor

Suction Discharge
Inlet Outlet

Suction Port

Discharge Port
Relief Valve Relief Valve

Direct Crankshaft Drive


Drive Rotor Driven Rotor

Oil Seal

Crank Pulley
Crankshaft

Oil Pump

Relief Valve Configuration The relief valve is configured to


prevent excessive oil pressure.
Discharge Port
The excess pressure along the
discharge port compresses the
Relief Valve
relief valve spring to open the
valve, relieving pressure by
Valve
re-circulating the oil back into
Spring the suction port.

Suction Port
Plug

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