Four stroke engine-basics

1. Four-Stroke Engine Four-Stroke Engine
BasicsBasics
Instructor: Adam MegelInstructor: Adam Megel
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2. OrientationOrientation
Throughout this lesson on four-Throughout this lesson on four-
stroke engines, learner will self-stroke engines, learner will self-
navigate through this navigate through this
PowerPoint presentationPowerPoint presentation
Be sure to click on every linkBe sure to click on every link
Learner will be quizzed at the Learner will be quizzed at the
end of the lesson end of the lesson
Click on Next to move on, or Click on Next to move on, or
Back to go back.Back to go back.
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3. Orientation Continued Orientation Continued
Material that will be covered:Material that will be covered:
Four-stroke engine basicsFour-stroke engine basics
Other engine typesOther engine types
Basic components of a four-stroke Basic components of a four-stroke
engineengine
The four-stroke cycleThe four-stroke cycle
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4. NextBack

5. The BasicsThe Basics
A four-stroke engine:A four-stroke engine:
Is an internal combustion engineIs an internal combustion engine
Converts gasoline into motionConverts gasoline into motion
Is the most common car engine Is the most common car engine
typetype
Is relatively efficientIs relatively efficient
Is relatively inexpensive Is relatively inexpensive
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6. Other Engine TypesOther Engine Types
Two-stroke enginesTwo-stroke engines
Diesel enginesDiesel engines
Rotary enginesRotary engines
Turbine enginesTurbine engines
Steam engines Steam engines
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7. Basic Components of Four-Basic Components of Four-
Stroke EnginesStroke Engines
Intake Valve
Valve Cover
Intake Port
Head
Coolant
Engine Block
Oil Pan
Oil Sump
Crankshaft
Camshaft
Exhaust Valve
Spark Plug
Exhaust Port
Piston
Connecting Rod
Rod Bearings
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Diagram

8. A. A. Intake Valve-Intake Valve- opens at the opens at the
proper time to let in air and fuel.proper time to let in air and fuel.
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9. B. B. Valve CoverValve Cover- Protects the - Protects the
valves and the valve springs. valves and the valve springs.
Keeps dirt out and lubricating oil Keeps dirt out and lubricating oil
in.in.
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10. C. C. Intake PortIntake Port- the passageway - the passageway
in a cylinder head for the fuel in a cylinder head for the fuel
and air to pass through.and air to pass through.
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11. D. D. HeadHead- a platform containing - a platform containing
most of the parts of the most of the parts of the
combustion chamber.combustion chamber.
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12. E. E. CoolantCoolant- circulating water - circulating water
and antifreeze to keep the and antifreeze to keep the
temperature regulated. temperature regulated.
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13. F. F. Engine BlockEngine Block- cast in one - cast in one
piece. The basis for most of the piece. The basis for most of the
parts of the engine.parts of the engine.
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14. G. G. Oil PanOil Pan- where the oil is - where the oil is
collected and recirculated.collected and recirculated.
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15. H. H. Oil SumpOil Sump- the collected oil - the collected oil
primarily for lubricating the primarily for lubricating the
crankshaft and rod bearingcrankshaft and rod bearing
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16. I. I. CamshaftCamshaft- a round shaft with - a round shaft with
lobes, that rotates to open and lobes, that rotates to open and
close the fuel and exhaust close the fuel and exhaust
valves.valves.
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17. J. J. Exhaust ValveExhaust Valve- open at the - open at the
proper time to release the proper time to release the
exhaustexhaust
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18. K. K. Spark PlugSpark Plug- a device, - a device,
inserted into the combustion inserted into the combustion
chamber for firing an electrical chamber for firing an electrical
spark to ignite air-fuel mixturespark to ignite air-fuel mixture
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19. L. L. Exhaust PortExhaust Port- the - the
passageway in a cylinder head, passageway in a cylinder head,
for the exhaust to pass throughfor the exhaust to pass through
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20. M. M. PistonPiston- the part of the - the part of the
engine that moves up and down engine that moves up and down
in the cylinder converting the in the cylinder converting the
gasoline into motiongasoline into motion
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21. N. N. Connecting RodConnecting Rod- links the - links the
piston to the crankshaft.piston to the crankshaft.
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22. O. O. Rod BearingRod Bearing- used to reduce - used to reduce
friction to the rod and crankshaftfriction to the rod and crankshaft
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23. P. P. CrankshaftCrankshaft- converts the up - converts the up
and down motion of the piston and down motion of the piston
into a turning, or rotating motioninto a turning, or rotating motion
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24. The 4-Stroke CycleThe 4-Stroke Cycle
1. 1.
2. 2.
3. 3.
4. 4.
Intake
Compression
Combustion
Exhaust
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25. IntakeIntake-- process of process of
filling the cylinder filling the cylinder
with the proper air-with the proper air-
fuel mixture fuel mixture
through the intake through the intake
valve.valve.
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26. CompressionCompression- -
the process of the process of
compressing the compressing the
air-fuel mixture in air-fuel mixture in
the cylinder to the cylinder to
make it more make it more
combustible combustible
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27. CombustionCombustion-the -the
process of igniting process of igniting
the compressed the compressed
air-fuel mixture to air-fuel mixture to
create motion and create motion and
the over all power the over all power
of the engine.of the engine.
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28. ExhaustExhaust- the - the
process of process of
releasing the releasing the
exhaust out of exhaust out of
the cylinder the cylinder
through the through the
exhaust valve.exhaust valve.
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29. ApplicationApplication
Now that you understand the Now that you understand the
basics of four-stroke engines, basics of four-stroke engines,
how can you use this how can you use this
information in the real world?information in the real world?
BackQuiz

30. Lets take a quiz to see what you Lets take a quiz to see what you
have learned!have learned!
BackQuiz

31. 1. The ____ controls the amount 1. The ____ controls the amount
of intake and the release of of intake and the release of
exhaust.exhaust.
a. heada. head
b. valvesb. valves
c. coolantc. coolant
d. connecting rodd. connecting rod

32. 2.2.The _____ Cycle is the ignition The _____ Cycle is the ignition
of the compressed fuel-air of the compressed fuel-air
mixture.mixture.
a. Exhausta. Exhaust
b. Combustionb. Combustion
c. Compressionc. Compression
d. Intaked. Intake

33. 3.3.The most common type of The most common type of
engine?engine?
a. diesel enginesa. diesel engines
b. 2-stroke enginesb. 2-stroke engines
c. rotary enginesc. rotary engines
d. 4-stroke enginesd. 4-stroke engines

34. 4.4.What part of the engine What part of the engine
converts up and down motion converts up and down motion
into a rotation motion?into a rotation motion?
a. crankshafta. crankshaft
b. pistonb. piston
c. valve coverc. valve cover
d. camshaftd. camshaft

35. 5.5.What is the name What is the name
of the part listed?of the part listed?
a. intake valvea. intake valve
b. piston b. piston
c. oil panc. oil pan
d. spark plugd. spark plug

36. Sorry, that is the wrong answer. Sorry, that is the wrong answer.
Try again.Try again.
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37. Sorry, that is the wrong answer. Sorry, that is the wrong answer.
Try again.Try again.
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38. Sorry, that is the wrong answer. Sorry, that is the wrong answer.
Try again.Try again.
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39. Sorry, that is the wrong answer. Sorry, that is the wrong answer.
Try again.Try again.
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40. Sorry, that is the wrong answer. Sorry, that is the wrong answer.
Try again.Try again.
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41. That is correct! Lets try the next That is correct! Lets try the next
one.one.
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42. That is correct! Lets try the next That is correct! Lets try the next
one.one.
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43. That is correct! Lets try the next That is correct! Lets try the next
one.one.
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44. That is correct! Lets try the next That is correct! Lets try the next
one.one.
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45. That is correct! Lets try the next That is correct! Lets try the next
one.one.
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46. Congratulations! That is the Congratulations! That is the
end of your quiz, and the end of end of your quiz, and the end of
your lesson on four-stroke your lesson on four-stroke
engines.engines.
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47. ReferencesReferences
www.howstuffworks.com/www.howstuffworks.com/
www.www.mdamda.org..org.ukuk/railway//railway/railobjvrailobjv
..htmhtm
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