1. Next 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. NextBack

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 NextBack

4. NextBack

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 NextBack

6. Other Engine Types Two-stroke engines Diesel engines Rotary engines Turbine engines Steam engines NextBack

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 Back Next Diagram

8. A. Intake Valve- opens at the proper time to let in air and fuel. Back

9. B. Valve Cover- Protects the valves and the valve springs. Keeps dirt out and lubricating oil in. Back

10. C. Intake Port- the passageway in a cylinder head for the fuel and air to pass through. Back

11. D. Head- a platform containing most of the parts of the combustion chamber. Back

12. E. Coolant- circulating water and antifreeze to keep the temperature regulated. Back

13. F. Engine Block- cast in one piece. The basis for most of the parts of the engine. Back

14. G. Oil Pan- where the oil is collected and recirculated. Back

15. H. Oil Sump- the collected oil primarily for lubricating the crankshaft and rod bearing Back

16. I. Camshaft- a round shaft with lobes, that rotates to open and close the fuel and exhaust valves. Back

17. J. Exhaust Valve- open at the proper time to release the exhaust Back

18. K. Spark Plug- a device, inserted into the combustion chamber for firing an electrical spark to ignite air-fuel mixture Back

19. L. Exhaust Port- the passageway in a cylinder head, for the exhaust to pass through Back

20. M. Piston- the part of the engine that moves up and down in the cylinder converting the gasoline into motion Back

21. N. Connecting Rod- links the piston to the crankshaft. Back

22. O. Rod Bearing- used to reduce friction to the rod and crankshaft Back

23. P. Crankshaft- converts the up and down motion of the piston into a turning, or rotating motion Back

24. The 4-Stroke Cycle 1. 2. 3. 4. Intake Compression Combustion Exhaust BackNext

25. Intake- process of filling the cylinder with the proper air-fuel mixture through the intake valve. Back

26. Compression- the process of compressing the air-fuel mixture in the cylinder to make it more combustible Back

27. Combustion-the process of igniting the compressed air-fuel mixture to create motion and the over all power of the engine. Back

28. Exhaust- the process of releasing the exhaust out of the cylinder through the exhaust valve. Back

29. Application Now that you understand the basics of four-stroke engines, how can you use this information in the real world? BackQuiz

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

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. Back

37. Sorry, that is the wrong answer. Try again. Back

38. Sorry, that is the wrong answer. Try again. Back

39. Sorry, that is the wrong answer. Try again. Back

40. Sorry, that is the wrong answer. Try again. Back

41. That is correct! Lets try the next one. Next

42. That is correct! Lets try the next one. Next

43. That is correct! Lets try the next one. Next

44. That is correct! Lets try the next one. Next

45. That is correct! Lets try the next one. Next

46. Congratulations! That is the end of your quiz, and the end of your lesson on four-stroke engines. Next

47. References www.howstuffworks.com/ www.mda.org.uk/railway/railobjv.htm To BeginningLast Slide