Four stroke engine-basics

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Four stroke engine-basics

  1. 1. Four-Stroke Engine Basics Instructor: Adam Megel Next
  2. 2. Orientation     Throughout this lesson on fourstroke engines, learner will selfnavigate 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. Back Next
  3. 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 Back Next
  4. 4. Back Next
  5. 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 Back Next
  6. 6. Other Engine Types      Two-stroke engines Diesel engines Rotary engines Turbine engines Steam engines Back Next
  7. 7. Basic Components of FourStroke Engines Camshaft Intake Valve Exhaust Valve Valve Cover Spark Plug Intake Port Exhaust Port Head Piston Connecting Rod Coolant Rod Bearings Engine Block Crankshaft Next Diagram Oil Pan Oil Sump Back
  8. 8.  A. Intake Valve- opens at the proper time to let in air and fuel. Back
  9. 9.  B. Valve Cover- Protects the valves and the valve springs. Keeps dirt out and lubricating oil in. Back
  10. 10.  C. Intake Port- the passageway in a cylinder head for the fuel and air to pass through. Back
  11. 11.  D. Head- a platform containing most of the parts of the combustion chamber. Back
  12. 12.  E. Coolant- circulating water and antifreeze to keep the temperature regulated. Back
  13. 13.  F. Engine Block- cast in one piece. The basis for most of the parts of the engine. Back
  14. 14.  G. Oil Pan- where the oil is collected and recirculated. Back
  15. 15.  H. Oil Sump- the collected oil primarily for lubricating the crankshaft and rod bearing Back
  16. 16.  I. Camshaft- a round shaft with lobes, that rotates to open and close the fuel and exhaust valves. Back
  17. 17.  J. Exhaust Valve- open at the proper time to release the exhaust Back
  18. 18.  K. Spark Plug- a device, inserted into the combustion chamber for firing an electrical spark to ignite air-fuel mixture Back
  19. 19.  L. Exhaust Port- the passageway in a cylinder head, for the exhaust to pass through Back
  20. 20.  M. Piston- the part of the engine that moves up and down in the cylinder converting the gasoline into motion Back
  21. 21.  N. Connecting Rod- links the piston to the crankshaft. Back
  22. 22.  O. Rod Bearing- used to reduce friction to the rod and crankshaft Back
  23. 23.  P. Crankshaft- converts the up and down motion of the piston into a turning, or rotating motion Back
  24. 24. The 4-Stroke Cycle     1. Intake 2. Compression 3. Combustion 4. Exhaust Back Next
  25. 25.  Intake- process of filling the cylinder with the proper airfuel mixture through the intake valve. Back
  26. 26.  Compressionthe process of compressing the air-fuel mixture in the cylinder to make it more combustible Back
  27. 27.  Combustion-the process of igniting the compressed air-fuel mixture to create motion and the over all power of the engine. Back
  28. 28.  Exhaust- the process of releasing the exhaust out of the cylinder through the exhaust valve. Back
  29. 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. 30.  Lets take a quiz to see what you have learned! Back Quiz
  31. 31. 1. The ____ controls the amount of intake and the release of exhaust. a. head b. valves c. coolant d. connecting rod
  32. 32. 2. The _____ Cycle is the ignition of the compressed fuel-air mixture. a. Exhaust b. Combustion c. Compression d. Intake
  33. 33. 3. The most common type of engine? a. diesel engines b. 2-stroke engines c. rotary engines d. 4-stroke engines
  34. 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. 35. 5. What is the name of the part listed? a. intake valve b. piston c. oil pan d. spark plug
  36. 36.  Sorry, that is the wrong answer. Try again. Back
  37. 37.  Sorry, that is the wrong answer. Try again. Back
  38. 38.  Sorry, that is the wrong answer. Try again. Back
  39. 39.  Sorry, that is the wrong answer. Try again. Back
  40. 40.  Sorry, that is the wrong answer. Try again. Back
  41. 41.  That is correct! Lets try the next one. Next
  42. 42.  That is correct! Lets try the next one. Next
  43. 43.  That is correct! Lets try the next one. Next
  44. 44.  That is correct! Lets try the next one. Next
  45. 45.  That is correct! Lets try the next one. Next
  46. 46.  Congratulations! That is the end of your quiz, and the end of your lesson on four-stroke engines. Next
  47. 47. References   www.howstuffworks.com/ www.mda.org.uk/railway/railobjv .htm To Beginning Last Slide
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