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OTTO CYCLE

OTTO CYCLE. Objective: Explain what is the Otto cycle, how it works and application By: Jonathan Tang. Otto Cycle. Also known as 4 stroke cycle in technical terms A Cycle used in internal combustion engines The first such engine was built by the German engineer Otto in 1861.

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OTTO CYCLE

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  1. OTTO CYCLE Objective: Explain what is the Otto cycle, how it works and application By: Jonathan Tang

  2. Otto Cycle • Also known as 4 stroke cycle in technical terms • A Cycle used in internal combustion engines • The first such engine was built by the German engineer Otto in 1861

  3. 4 Strokes of the Otto Cycle • Cycle contains 4 strokes 1)Intake stroke 2)Compression stroke 3)Power stroke 4)Exhaust stroke

  4. - Intake valve opens and a mixture of air and fuel with a relatively low pressure (near atmosphere) is drawn into the cylinder. As piston begin to move back up, intake valve closes. • Intake stroke • Compression stroke -With both valve closed, the fuel-air mixture is compressed by the upward movement of piston, causing a rise in pressure.

  5. -The mixture is ignited by spark plugs with the piston staying nearly fixed, leading to a rise in pressure and temperature. -The hot gas is then allowed to do work by pushing the piston back. • Power Stroke • Exhaust Stroke -The exhaust valve is opened and some exhaust escapes with the piston remaining fixed. -The piston forces the remaining exhaust to escape. The exhaust valve is then closed, the intake valve opened, and the cycle repeats

  6. Applications • Common cycle used in internal combustion engines. • Otto cycle (4 stroke) engines are commonly used in most cars and trucks today Conclusion: • Otto cycle engines are most commonly used compare to 2 stroke or Wankel (rotary) engine

  7. References • http://en.wikipedia.org/wiki/Otto_cycle • http://scienceworld.wolfram.com/physics/OttoCycle.html • http://www.keveney.com/otto.html • http://www.grc.nasa.gov/WWW/K12/airplane/engopt.html

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