• A four-stroke engine (also known as four-cycle) is an internal combustion engine in which the piston completes four separate strokes which constitute a single thermodynamic cycle. The four separate strokes are termed as Intake, Compression, Power, and Exhaust. The fuel used is diesel. Air is compressed first and then the fuel is injected.
  • This model shows the internal structure and the operating principles of a four stroke water-cooled diesel engine.
  • This is of the chain-driven overhead camshaft type and all functional components like camshaft, rock-arms, tappets etc. are clearly demonstrated.
  • The valves are clearly evident, cams being driven by a gear train from the rear of the main crank.
  • The functioning of fuel injection system is also represented.
  • Cross sections of the fuel supply is also shown.
  • Hand powered motion supplied through a crank demonstrates the moving parts of the engine.
  • Crank shaft, piston, valves and cams, cycle through all stages of the four-stroke process as the hand crank is rotated.
  • Ignition is shown by means of a miniature bulb.
  • The model is mounted on a base that comes with a labeled placard which also has printed diagrams explaining the working of the engine.


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