Chapter 4: Thermodynamics and Engine Cycles

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Chapter 4 Thermodynamics and Engine Cycles

• BAE 517 - Lecture 4

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Brief History of IC Engine Development

• Abbe Hautefeuille (Frenchman) built a closed
  chamber in which he explode gunpowder. The
  resulting pressure raised a column of water.
• In 1680, a Dutch physicist, Huygens, replaced the
  water column with a piston.
• These systems were not efficient in that the
  gases were not compressed prior to combustion.

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Brief History of IC Engine Development

• In 1838 Burnett pointed out the advantages of
  compressing gases.
• Beau de Rochas (1862) set fourth four principles
  for an efficient IC engine
• Smallest possible surface-to-volume ratio for
  combustion chamber.
• Expansion should take place rapidly.
• Longest possible piston stroke.
• Pressure should be as high as possible at start
  of expansion.

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Brief History of IC Engine Development

• Nikolaus Otto built on the previous principles
  when he patented the Otto-cycle engine in 1876.
• First 4-stroke engine
• Expiration of this patent in 1890 prompted
  commercialization of this engine.
• In 1881 Sir Dugald Clerk built a 2-stroke engine