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Automotive Engines

Automotive Engines. Part 3 (internal Parts). Internal Parts of Block. Internal Parts of Block. Crankshaft – converts linear motion to rotational motion Made from cast iron or forged steel Cast iron = cheap Forged Steel = strong. Crankshaft. Purple – PTO Flange

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Automotive Engines

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  1. Automotive Engines Part 3 (internal Parts)

  2. Internal Parts of Block

  3. Internal Parts of Block • Crankshaft – • converts linear motion to rotational motion • Made from cast iron or forged steel • Cast iron = cheap • Forged Steel = strong

  4. Crankshaft • Purple – PTO Flange • Red – Crankpin, Throw, Offset • Blue – Main • Yellow – Counterweight • Green - Snout

  5. Internal Parts of Block • Piston – • a cylindrical part fitted in a cylinder transmitting power created by the combusting fuel & air • Cast Aluminum – Factory • Hypereutectic – Street/Strip • Forged – Hi-Perf

  6. Piston • Blue – Dome • Green – Ring Land • Red – Skirt • Purple – Wrist Pin

  7. Internal Parts of Block • Connecting Rod – • connects piston to crankshaft • I – Beam or H – Beam • Cast, Forged, Powdered Metal • Iron, Steel, Aluminum, Titanium

  8. Connecting Rod Blue: Big End Green: Small End Red: Bearings

  9. Internal Parts of Block • Camshaft – • controls valve movement (Dist. Drive, Fuel Pump) 2. Two Main Types Flat Tappet • Solid or Hydraulic Roller • Mechanical or Hydraulic

  10. Roller & Flat

  11. Camshaft (Flat) Flat Tappet Lobe: Narrow and “Peaky”

  12. Camshaft (Roller) • Roller Lobe: Wide and flat

  13. Tappets – Roller Vs. Flat

  14. Flat Tappet (Hydraulic Vs. Solid)

  15. Roller Tappet (Hydraulic Vs. Solid)

  16. Internal Parts of Block • Timing Chain / Gears – • connect crank to cam

  17. Timing Chain / Gears

  18. Internal Parts of Block • Oil Pump – pushes oil throughout engine • Gear Type • A pair of gears mesh with each other and revolve in a close fitting housing. Oil fed in at one side is carried out round the edge and out the outer side. • Rotor Type • An inner rotor meshes with the outer one which has one more lobe. Having different axes of rotation the spaces vary in size, causing oil to be drawn in and forced out.

  19. Gear Type

  20. Rotor Type

  21. Internal Parts of Block • Bearings (2 types) • Plain • Roller • Plain type: item rides on a film of oil • Three types • Mains – allow crank to spin (2 piece) • Rods – allow rods to spin (2 piece) • Cam – allow cam to spin (1 piece)

  22. Bearings

  23. The End

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