4 Stroke Engine Theory

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Across
  1. 1. Helps maintain the engine's rotational inertia.
  2. 6. (Bottom Dead Center) The lowest point the piston reaches in the cylinder.
  3. 7. The space in which the piston moves.
  4. 9. Rod Links the piston to the crankshaft.
  5. 11. The stroke where the air-fuel mixture ignites and expands, driving the piston down.
  6. 13. The stroke where the air-fuel mixture is drawn into the cylinder.
  7. 14. Coil Converts battery voltage to a high voltage to power the spark plug.
  8. 15. Ratio The ratio of the cylinder volume at BDC to the cylinder volume at TDC.
  9. 17. A cylindrical part that moves up and down inside the cylinder.
  10. 18. A seal that prevents fluid leakage between two surfaces.
  11. 19. The stroke where burnt gases are expelled from the cylinder.
Down
  1. 2. The process of reducing friction between engine components.
  2. 3. Opens or closes to control the flow of air-fuel mixture or exhaust gases.
  3. 4. Mixes air and fuel in the proper ratio for combustion.
  4. 5. (Top Dead Center) The highest point the piston reaches in the cylinder.
  5. 8. Plug Ignites the air-fuel mixture in the combustion chamber.
  6. 10. Converts the reciprocating motion of the piston into rotational motion.
  7. 12. The synchronization of engine components for optimal performance.
  8. 15. The stroke where the air-fuel mixture is compressed in the cylinder.
  9. 16. Controls the opening and closing of the intake and exhaust valves.