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ARRDEKTA INSTITUTE OF TECHNOLOGY
GUIDED BY
PROF R.S.SAGAR IN MECHANICAL DEPT.
PROF.M.R.CHAUDHARY IN MECHANICAL DEPT
PREPARED BY
130930119064 PARMAR DEVENDRASINH
130930119065 PARMAR DHARMESHKUMAR BABULAL
130930119066 PARMAR YOGENDRASINH
130930119067 PARMAR YUVRAJSINH JASHVANTSINH
130930119068 PATEL AKSHAY ARAVINDBHAI
130930119070 PATEL ANUPKUMAR ARVINDBHAI
130930119071 PATEL DARSHITKUMAR MUKESHBHAI

2. Orientation
 Throughout this lesson on four-stroke engines, learner
will self-navigate through this PowerPoint
presentation
 Be sure to click on every link
 Learner will be quizzed at the end of the lesson
 Click on Next to move on, or Back to go back.
Next
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3. Orientation Continued
 Material that will be covered:
 Four-stroke engine basics
 Other engine types
 Basic components of a four-stroke engine
 The four-stroke cycle
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4. Next
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5. The Basics
 A four-stroke engine:
 Is an internal combustion engine
 Converts gasoline into motion
 Is the most common car engine type
 Is relatively efficient
 Is relatively inexpensive
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6. Other Engine Types
 Two-stroke engines
 Diesel engines
 Rotary engines
 Turbine engines
 Steam engines
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7. Basic Components of Four-Stroke
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. Intake Valve- opens at the proper time to let in air
and fuel.
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9.  B. Valve Cover- Protects the valves and the valve
springs. Keeps dirt out and lubricating oil in.
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10.  C. Intake Port- the passageway in a cylinder head for
the fuel and air to pass through.
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11.  D. Head- a platform containing most of the parts of
the combustion chamber.
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12.  E. Coolant- circulating water and antifreeze to keep
the temperature regulated.
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13.  F. Engine Block- cast in one piece. The basis for most
of the parts of the engine.
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14.  G. Oil Pan- where the oil is collected and recirculated.
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15.  H. Oil Sump- the collected oil primarily for
lubricating the crankshaft and rod bearing
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16.  I. Camshaft- a round shaft with lobes, that rotates to
open and close the fuel and exhaust valves.
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17.  J. Exhaust Valve- open at the proper time to release
the exhaust
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18.  K. Spark Plug- a device, inserted into the combustion
chamber for firing an electrical spark to ignite air-fuel
mixture
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19.  L. Exhaust Port- the passageway in a cylinder head, for
the exhaust to pass through
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20.  M. Piston- the part of the engine that moves up and
down in the cylinder converting the gasoline into
motion
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21.  N. Connecting Rod- links the piston to the crankshaft.
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22.  O. Rod Bearing- used to reduce friction to the rod and
crankshaft
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23.  P. Crankshaft- converts the up and down motion of
the piston into a turning, or rotating motion
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24. The 4-Stroke Cycle
 1.
 2.
 3.
 4.
Intake
Compression
Combustion
Exhaust
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25.  Intake- process of
filling the cylinder with
the proper air-fuel
mixture through the
intake valve.
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26.  Compression- the
process of compressing
the air-fuel mixture in
the cylinder to make it
more combustible
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27.  Combustion-the
process of igniting the
compressed air-fuel
mixture to create
motion and the over all
power of the engine.
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28.  Exhaust- the process
of releasing the
exhaust out of the
cylinder through the
exhaust valve.
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29. Application
 Now that you understand the basics of four-stroke
engines, how can you use this information in the real
world?
Back Quiz

30.  Lets take a quiz to see what you have learned!
Back Quiz

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

32. 2. The _____ Cycle is the ignition of the compressed
fuel-air mixture.
a. Exhaust
b. Combustion
c. Compression
d. Intake

33. 3. The most common type of engine?
a. diesel engines
b. 2-stroke engines
c. rotary engines
d. 4-stroke engines

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

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

36.  Sorry, that is the wrong answer. Try again.
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37.  Sorry, that is the wrong answer. Try again.
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38.  Sorry, that is the wrong answer. Try again.
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39.  Sorry, that is the wrong answer. Try again.
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40.  Sorry, that is the wrong answer. Try again.
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41.  That is correct! Lets try the next one.
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42.  That is correct! Lets try the next one.
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43.  That is correct! Lets try the next one.
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44.  That is correct! Lets try the next one.
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45.  That is correct! Lets try the next one.
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46.  Congratulations! That is the end of your quiz, and the
end of your lesson on four-stroke engines.
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47. References
 www.howstuffworks.com/
 www.mda.org.uk/railway/railobjv.htm
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