Engine lubrication

Page 69 of workbook

AimsAims

Objectives (Learning outcomeObjectives (Learning outcome)

To understand the principle of theTo understand the principle of the Lubrication system in a modern engine. Lubrication system in a modern engine.

The student will know the mainThe student will know the main Components that make up the lubricationComponents that make up the lubrication system.system.

Engine lubrication systemEngine lubrication system

Name the parts indicated, which make Name the parts indicated, which make up the engine lubrication systemup the engine lubrication system

CamshaftCamshaft

Big endBig endbearingbearing

MainMainbearingbearing

Gauze FilterGauze Filter

Oil PumpOil Pump

PressurePressureRelief valve Relief valve

Oil filterOil filter

CrankshaftCrankshaftOil drillingOil drilling

Drilling toDrilling toMain bearingMain bearing

Main oilMain oilgallerygallery

Oil pick up tubeOil pick up tube

Engine sumpEngine sump

Oil FilterOil Filter

Oil pumpOil pump

Oil Pressure relief valveOil Pressure relief valve

Pressure feed systemPressure feed system

State Four functions provided by State Four functions provided by the oilthe oil

It reduces friction and wear and acts as aIt reduces friction and wear and acts as acleaner and coolantcleaner and coolant

State the purpose of the following State the purpose of the following itemsitems

• Gauze filter

• Oil pump

• Relief valve

• External (secondary)filter

• Main Gallery

To trap and prevent large particlesTo trap and prevent large particlesFrom entering the systemFrom entering the systemTo supply the system with oilTo supply the system with oilUnder pressureUnder pressureTo control or limit the pressure inTo control or limit the pressure inThe systemThe systemTo trap fine particles beforeTo trap fine particles beforethey contact the bearing surfacesthey contact the bearing surfaces

To distribute the oil supply at anTo distribute the oil supply at anEven pressure to the camshaft andEven pressure to the camshaft andCrankshaft bearings Crankshaft bearings

InvestigationInvestigationExamine an engine so as to determine theExamine an engine so as to determine thePosition of the oil passage-ways,filters,Position of the oil passage-ways,filters,pumps and pressure relief valvespumps and pressure relief valves

Engine makeEngine make FordFord

ModelModel 16001600

ComponentComponent TypeType PositionPosition

Oil pumpOil pump

PrimaryPrimaryFilterFilter

SecondarySecondaryfilterfilterOil PressureOil PressureRelief valveRelief valve

Oil pressureOil pressureindicatorindicator

EccentricEccentricvanevane

Spring loaded pressingSpring loaded pressingOn sump bottomOn sump bottom

PaperPaperelementelement

Bolted onto oilBolted onto oilpump bodypump body

PlungerPlunger Fitted in oil pumpFitted in oil pumpFilter bodyFilter body

DiaphragmDiaphragmSwitchSwitch

Screws into the mainScrews into the mainGallery on the block atGallery on the block at the side of the pumpthe side of the pump

On side of engine blockOn side of engine block

CoarseCoarseMesh bowlMesh bowl

Loss of oil pressureLoss of oil pressure

Progress CheckEngine lubrication systemEngine lubrication system

1.1. What is the purpose of the gauze filter?What is the purpose of the gauze filter?

a. To regulate oil pressurea. To regulate oil pressure b. To maintain the oil levelb. To maintain the oil level c. To prevent small particles from c. To prevent small particles from

entering the systementering the system d. To prevent large particles from d. To prevent large particles from

entering the systementering the system

Progress check

2. What is the purpose of the relief 2. What is the purpose of the relief valve?valve?

a. To control the speed of the engine.a. To control the speed of the engine. b. To aid the starting of the vehicle.b. To aid the starting of the vehicle. c. To control the oil pressure in thec. To control the oil pressure in the system.system. d. To reduce engine lubrication to ad. To reduce engine lubrication to a minimum.minimum.

Progress check

3. What is the purpose of the oil filter?3. What is the purpose of the oil filter? a. a. To trap fine dirt particles in the To trap fine dirt particles in the oil waysoil ways

b. To trap large dirt particles in the b. To trap large dirt particles in the oil waysoil ways c. To trap waterc. To trap water

d. To serve as a top-up reservoir for the d. To serve as a top-up reservoir for the sumpsump

Progress check

4.4. What is the purpose of the main oil What is the purpose of the main oil gallery?gallery?

a. A place for the oil to drain backa. A place for the oil to drain back to the sumpto the sump b. To distribute the oil supply at anb. To distribute the oil supply at an even pressureeven pressure c. Provides a direct route for thec. Provides a direct route for the oil to the oil filteroil to the oil filter d. Provides lubrication for thed. Provides lubrication for the camshaft onlycamshaft only

Progress check

5. What is the purpose of the oil pump?5. What is the purpose of the oil pump?

a. To ensure the oil doesn’t stay ina. To ensure the oil doesn’t stay in the cylinder head.the cylinder head. b. To ensure the oil doesn’t leak intob. To ensure the oil doesn’t leak into the combustion chamber.the combustion chamber. c. To lubricate the flywheel c. To lubricate the flywheel d. To supply the system withd. To supply the system with pressurised oil.pressurised oil.

Progress check

1.1. What is the purpose of the gauze filter?What is the purpose of the gauze filter?

a. To regulate oil pressurea. To regulate oil pressure b. To maintain the oil levelb. To maintain the oil level c. To prevent small particles from c. To prevent small particles from

entering the systementering the system d. To prevent large particles from d. To prevent large particles from

entering the systementering the system

Progress check

2. What is the purpose of the relief 2. What is the purpose of the relief valve?valve?

a. To control the speed of the engine.a. To control the speed of the engine. b. To aid the starting of the vehicle.b. To aid the starting of the vehicle. c. To control the oil pressure in thec. To control the oil pressure in the system.system. d. To reduce engine lubrication to ad. To reduce engine lubrication to a minimum.minimum.

Progress check

3. What is the purpose of the oil filter?3. What is the purpose of the oil filter? a. a. To trap fine dirt particles in the To trap fine dirt particles in the oil waysoil ways

b. To trap large dirt particles in the b. To trap large dirt particles in the oil waysoil ways c. To trap waterc. To trap water

d. To serve as a top-up reservoir for the d. To serve as a top-up reservoir for the sumpsump

Progress check

4.4. What is the purpose of the main oil What is the purpose of the main oil gallery?gallery?

a. A place for the oil to drain backa. A place for the oil to drain back to the sumpto the sump b. To distribute the oil supply at anb. To distribute the oil supply at an even pressureeven pressure c. Provides a direct route for thec. Provides a direct route for the oil to the oil filteroil to the oil filter d. Provides lubrication for thed. Provides lubrication for the camshaft onlycamshaft only

Progress check

5. What is the purpose of the oil pump?5. What is the purpose of the oil pump?

a. To ensure the oil doesn’t stay ina. To ensure the oil doesn’t stay in the cylinder head.the cylinder head. b. To ensure the oil doesn’t leak intob. To ensure the oil doesn’t leak into the combustion chamber.the combustion chamber. c. To lubricate the flywheel c. To lubricate the flywheel d. To supply the system withd. To supply the system with pressurised oil.pressurised oil.

Progress check

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