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The Diesel Cycle. Robert Amirault Objective: To establish the function, pros and cons and uses of a diesel engine. Gasoline Engine. Burns unleaded refined gasoline Lower compression ratio (8:1 to 12:1) Subject to “knocking” at high compression Mixes the fuel before injection

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the diesel cycle

The Diesel Cycle

Robert Amirault

Objective: To establish the function, pros and cons and uses of a diesel engine.

gasoline engine
Gasoline Engine
  • Burns unleaded refined gasoline
  • Lower compression ratio (8:1 to 12:1)
  • Subject to “knocking” at high compression
  • Mixes the fuel before injection
  • Uses spark plugs
diesel engine
Diesel Engine
  • Burns less refined diesel fuel
  • High compression ratio (14:1 to 25:1)
  • Low risk of “knocking” easy to turbo charge and supercharge
  • Relies only on pressure to ignite fuel
  • Uses glow plugs (larger engines do not)
  • Injects the fuel directly into the cylinder
benefits
Benefits
  • More energy is contained in diesel fuel
    • One gallon of diesel contains 155 MJ
    • One gallon of gasoline contains 132 MJ
  • More efficient
  • Cheaper fuel
drawbacks
Drawbacks
  • More expensive to manufacture
  • Noisier
  • More pollutant
  • Low acceleration due to high torque
  • Required to run at lower RPM
the diesel cycle1
The Diesel Cycle
  • Definition
    • The diesel cycle is the combustion process of a type of internal combustion engine in which the burning of the fuel is triggered not by a spark plug as in the Otto cycle, but rather by the heat generated in compressing the fuel-air mixture.
  • Four parts
    • Intake
    • Compression
    • Injection/combustion
    • Exhaust
the engine
The Engine
  • The dissected engine was a gasoline engine
  • The spark plug shows that it is not diesel
  • Diesel engines are most often found in large trucks, boats, trains and anything requiring a lot of power without much speed.
references
References
  • http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/diesel.html
  • http://www.google.ca/search?hl=en&lr=&safe=off&rls=GGGL,GGGL:2005-09,GGGL:en&oi=defmore&defl=en&q=define:Diesel+cycle
  • http://auto.howstuffworks.com/diesel1.htm
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