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Module 2: Power Train

Module 2: Power Train. “Getting the Power to the Pavement”. Eric Klang. The Rock 2005. MAE 442 – Automotive Engineering 2006. Vehicle Layout. Rear engine / rear wheel drive. Mid engine / four wheel drive. Front engine / front wheel drive. Front engine / rear wheel drive.

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Module 2: Power Train

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  1. Module 2: Power Train “Getting the Power to the Pavement” Eric Klang The Rock 2005 MAE 442 – Automotive Engineering 2006

  2. Vehicle Layout Rear engine / rear wheel drive Mid engine / four wheel drive Front engine / front wheel drive Front engine / rear wheel drive MAE 442 – Automotive Engineering 2006

  3. Drive Train Outline 2.1 Couplers 2.2 Transmissions 2.3 Differentials 2.4 Bearings 2.5 Axels 2.6 Brakes Grease Fitting Locations MAE 442 – Automotive Engineering 2006

  4. 2.1 Couplers MAE 442 – Automotive Engineering 2006

  5. 2.1 Couplers • Needs: • Start and Stop • Shift gears • Solutions: • Mechanical Coupler (clutch) • Fluid Coupler (torque converter) • Electrical Coupler (generator) MAE 442 – Automotive Engineering 2006

  6. 2.1.1 Clutches MAE 442 – Automotive Engineering 2006

  7. 2.1.1 Clutches MAE 442 – Automotive Engineering 2006

  8. 2.1.1 Clutch Operation Engine Disengaged With Transmission Clutch pedal in Eric Klang Engine Engaged With Transmission Clutch pedal out Eric Klang MAE 442 – Automotive Engineering 2006

  9. 2.1.1 Clutches MAE 442 – Automotive Engineering 2006

  10. 2.1.1 Clutches d F = spring force (normal to surface) m = friction coefficient N = number of surfaces (= 2 for most cars) D Torque equations for clutches MAE 442 – Automotive Engineering 2006

  11. 2.1.1 Clutches MAE 442 – Automotive Engineering 2006

  12. 2.1.1 Clutch References • http://auto.howstuffworks.com/clutch.htm • Automotive Engineering Fundamentals • MAE 442 Student Projects: • Automotive Clutches • Clutch Assembly MAE 442 – Automotive Engineering 2006

  13. 2.1.2 Torque Converters MAE 442 – Automotive Engineering 2006

  14. 2.1.2 Torque Converters Turbine, Stator and Pump MAE 442 – Automotive Engineering 2006

  15. 2.1.2 Torque Converters Turbine (driven) Pump (driver) Stator MAE 442 – Automotive Engineering 2006

  16. 2.1.2 Torque ConvertersReferences • http://auto.howstuffworks.com/torque-converter.htm • Automotive Engineering 2006 Fundamentals • MAE 442 Student Projects: • None Yet MAE 442 – Automotive Engineering 2006

  17. 2.2 Transmissions MAE 442 – Automotive Engineering 2006

  18. 2.2 Transmission Outline 2.2.1 Gears 2.2.2 Manual Transmissions 2.2.3 Automatic Transmissions 2.2.4 CVT’s MAE 442 – Automotive Engineering 2006

  19. 2.2.1 Gears • Spur • Rack and pinion • Internal • Helical • Herringbone • Bevel • Miter • Worm MAE 442 – Automotive Engineering 2006

  20. 2.2.1 Gear Ratio • Small = Pinion • Large = Gear • Input vs. Output • GR = dout /din MAE 442 – Automotive Engineering 2006

  21. 2.2.1 Gear Terminology MAE 442 – Automotive Engineering 2006

  22. 2.2.1 Gear Terminology Pitch = N/d N = Number of Teeth d = Diameter of Pitch Circle • Pressure Angle • Through Pitch Point • Tangent to Base Circle Gears mesh if Pitch and Pressure Angle match Note: dout /din = Nout /Nin = GR MAE 442 – Automotive Engineering 2006

  23. 2.2.1 Gear Pressure Angle • Lower angle = more efficiency • Higher angle = more clearance • 20o & 25o standard MAE 442 – Automotive Engineering 2006

  24. 2.2.1 Gear Animations • gear_teeth_contact.mov • involute_curve.mov • spur_gear.mov • helical_gears.mov • bevel_gears.mov • worm_gears.mov • herringbone_gears.mov MAE 442 – Automotive Engineering 2006

  25. 2.2.2 Manual Transmissions Real World Theoretical World Jetta Transmission Removal MAE 442 – Automotive Engineering 2006

  26. 2.2.2 Manual Transmissions MAE 442 – Automotive Engineering 2006

  27. 2.2.2 Manual Transmissions MAE 442 – Automotive Engineering 2006

  28. 2.2.2 Manual Transmissions MAE 442 – Automotive Engineering 2006

  29. 2.2.2 Manual Transmissions MAE 442 – Automotive Engineering 2006

  30. 2.2.2 Manual Transmissions MAE 442 – Automotive Engineering 2006

  31. 2.2.2 Synchronizers MAE 442 – Automotive Engineering 2006

  32. 2.2.3 Automatic Transmissions MAE 442 – Automotive Engineering 2006

  33. 2.2.3 Automatic Transmissions MAE 442 – Automotive Engineering 2006

  34. 2.2.3 Automatic Transmissions MAE 442 – Automotive Engineering 2006

  35. 2.2.3 Automatic Transmissions MAE 442 – Automotive Engineering 2006

  36. 2.2.3 Automatic Transmissions MAE 442 – Automotive Engineering 2006

  37. 2.2.3 Automatic Transmissions MAE 442 – Automotive Engineering 2006

  38. 2.2.4 CVT References • CVT.ppt • CVT Project.pdf MAE 442 – Automotive Engineering 2006

  39. Homework 2.1 • Problem 6 MAE 442 – Automotive Engineering 2006

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