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2. 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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3. Other Engine Types Two-stroke engines Diesel engines Rotary engines
Turbine engines
Steam engines
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4. Basic Components of Four-Stroke Engines
Camshaft
Intake Valve
Exhaust Valve
Valve Cover
Spark Plug
Intake Port
Exhaust Port
Head
Piston
Connecting Rod
Coolant
Rod Bearings
Engine Block
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Diagram
Crankshaft
Oil Pan
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Oil Sump

5. A. Intake Valve- opens at the proper time to let in air and fuel.
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6. B. Valve Cover- Protects the valves and the valve springs
B. Valve Cover- Protects the valves and the valve springs. Keeps dirt out and lubricating oil in.
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7. C. Intake Port- the passageway in a cylinder head for the fuel and air to pass through.
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8. D. Head- a platform containing most of the parts of the combustion chamber.
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9. E. Coolant- circulating water and antifreeze to keep the temperature regulated.
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10. F. Engine Block- cast in one piece
F. Engine Block- cast in one piece. The basis for most of the parts of the engine.
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11. G. Oil Pan- where the oil is collected and recirculated.
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12. H. Oil Sump- the collected oil primarily for lubricating the crankshaft and rod bearing
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13. I. Camshaft- a round shaft with lobes, that rotates to open and close the fuel and exhaust valves.
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14. J. Exhaust Valve- open at the proper time to release the exhaust
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15. K. Spark Plug- a device, inserted into the combustion chamber for firing an electrical spark to ignite air-fuel mixture
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16. L. Exhaust Port- the passageway in a cylinder head, for the exhaust to pass through
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17. M. Piston- the part of the engine that moves up and down in the cylinder converting the gasoline into motion
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18. N. Connecting Rod- links the piston to the crankshaft.
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19. O. Rod Bearing- used to reduce friction to the rod and crankshaft
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20. P. Crankshaft- converts the up and down motion of the piston into a turning, or rotating motion
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21. The 4-Stroke Cycle 1. Intake 2. 3. Compression 4. Combustion Exhaust
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22. Intake- process of filling the cylinder with the proper air- fuel mixture through the intake valve.
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23. Compression- the process of compressing the air-fuel mixture in the cylinder to make it more combustible
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24. 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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25. Exhaust- the process of releasing the exhaust out of the cylinder through the exhaust valve.
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26. Application
Now that you understand the basics of four-stroke engines, how can you use this information in the real world?
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Quiz

27. Lets take a quiz to see what you have learned!
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Quiz

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

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

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

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

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