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Automotive Engines

Automotive Engines. Engine Construction. Block Top End Bottom End Front End Rear Valve Train. Engine Block Mfg. Machining. Casting Marks. Operational Cycles Number of Cylinders Cylinder Arrangement Valve Train Types Ignition System Cooling System Fuel Type. ENGINE CLASSIFICATION.

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Automotive Engines

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  1. Automotive Engines

  2. Engine Construction • Block • Top End • Bottom End • Front End • Rear • Valve Train

  3. Engine Block Mfg.

  4. Machining

  5. Casting Marks

  6. Operational Cycles Number of Cylinders Cylinder Arrangement Valve Train Types Ignition System Cooling System Fuel Type ENGINE CLASSIFICATION

  7. Bore Stroke Displacement Compression Ratio Square Combustion Chamber TDC BDC Engine related terms

  8. Compression Ratio • Volume at • BDC • : • Volume at • TDC

  9. Displacement • π x r2 X Stroke • OR • (Bore2 X π X stroke) • 4

  10. Displacement • π x r2 X Stroke • (X # of cylinders) • OR • (Bore2 X π X stroke) • 4 • X (# of cylinders)

  11. Metric Liters Cubic Centimeters Standard IN3 Conversion Metric to IN3 Liters X 62 IN3 to L IN3 /62 Displacement

  12. Cylinder parts • Piston • Stroke • Diameter • Crankshaft • Throw • Pins • Cylinder • Bore • Square • Connecting Rod

  13. Operational Cycles • 2 Stroke • 4 Stroke • Rotary • Wankel • Intake • Compression • Power • Exhaust

  14. NUMBER of Cylinders • 3 • 4 • 6 • 8 • 10 • 12 • 16

  15. V Inline Horizontally Opposed Slant Rotary Cylinder Arrangements

  16. IGNITION • Spark • Heat/Compression

  17. COOLING SYSTEMS • Air • Liquid

  18. 4-Stroke Gasoline Engines • Intake • Compression • Power • Exhaust http://www.howstuffworks.com/engine1.htm

  19. INTAKE • Intake Valve Open • Cam Shaft • Air Fuel Charge Enters • Piston Travels Down in Cylinder • TDC-BDC

  20. COMPRESSION STROKE • Valves Closed • Piston Upward • Compression of Air-Fuel Mixture • Make Charge Volatile • BDC-TDC

  21. POWER STROKE • SPARK • Explosion • Both Valves Closed • Piston Pushed Down • Turns Crankshaft • TDC-BDC

  22. EXHAUST STROKE • Exhaust Valve open • Burnt air/fuel Mixture Evacuated • Piston Travels Upward • BDC-TDC • Start 4 strokes again

  23. 2 Stroke • Intake and Exhaust together • Compression and Intake together • Oil/Gas mixed • No oil in oil pan • Works at any angle • http://www.howstuffworks.com/two-stroke2.htm

  24. CHARACTERISTICS of 4 Stroke Engine Design • In-Line • V-Type • Slant Cylinder Opposed Cylinder • Valve and Cam Shaft Placement • Valve Arrangements • Valve Operation • Engine Location

  25. INLINE ENGINE http://www.howstuffworks.com/engine-inline.htm

  26. V-TYPE ENGINES http://www.howstuffworks.com/engine-inline.htm

  27. 15˚ V

  28. SLANT CYLINDER

  29. OPPOSED CYLINDER http://www.howstuffworks.com/engine-flat.htm

  30. W

  31. ENGINE LOCATION • Front Engine • Rear Engine • Mid-Engine

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