Diesel engines - how they work

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Across
  1. 2. Another element of the slider-crank mechanism
  2. 3. Diesel engines are ______ combustion engines
  3. 5. Fires and ignites the fuel mixture in petrol engines (5,4)
  4. 6. Control opening and closing of valves
  5. 8. The more _________ an engine has, the smoother it will operate
  6. 11. The more you compress air, the ______ it gets
  7. 12. Steam engines are ______ combustion engines
  8. 13. One of the four elements of the slider-crank mechanism, moves up and down in the cylinder during combustion
  9. 15. Diesel engines are more _________ than steam engines
  10. 16. What happens when fuel is injected in during the power stroke
  11. 18. During the ____ stroke, chemical energy is converted to mechanical energy
  12. 19. Also help smooth out power
  13. 20. Linear motion at the piston is converted to ______ motion at the crank
  14. 21. Houses the valves (8,4)
Down
  1. 1. Supports the slider-crank mechanism (6,5)
  2. 4. Device that controls the flow of fluid or air by opening and closing
  3. 5. When the piston goes down, the inlet valve opens and air enters, the engine "breathes" (7,5)
  4. 7. Helps smooth out power
  5. 9. Pump that delivers fuel at high pressure to the combustion chambers
  6. 10. Position of inlet and exhaust valves during the compression stroke
  7. 14. Part of the slider-crank mechanism, joins the piston to the crankshaft (10,3)
  8. 17. Causes the movement of the piston during the exhaust stroke