The diesel cycle
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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

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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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