Presentation on theme: "OTTO CYCLE Objective: Explain what is the Otto cycle, how it works and application By: Jonathan Tang."— Presentation transcript:
1 OTTO CYCLEObjective: Explain what is the Otto cycle, how it works and applicationBy: Jonathan Tang
2 Otto Cycle Also known as 4 stroke cycle in technical terms A Cycle used in internal combustion enginesThe first such engine was built by the German engineer Otto in 1861
3 4 Strokes of the Otto Cycle Cycle contains 4 strokes1)Intake stroke2)Compression stroke3)Power stroke4)Exhaust stroke
4 Intake stroke Compression stroke - 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.-With both valve closed, the fuel-air mixture is compressed by the upward movement of piston, causing a rise in pressure.
5 Power Stroke Exhaust Stroke -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.-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 todayConclusion:Otto cycle engines are most commonly used compare to 2 stroke or Wankel (rotary) engine