The Diesel Cycle

1
The Diesel Cycle

• Robert Amirault
• Objective To establish the function, pros and
  cons and uses of a diesel engine.

2
Gasoline Engine

• Burns unleaded refined gasoline
• Lower compression ratio (81 to 121)
• Subject to knocking at high compression
• Mixes the fuel before injection
• Uses spark plugs

3
Diesel Engine

• Burns less refined diesel fuel
• High compression ratio (141 to 251)
• 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

4
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

5
Drawbacks

• More expensive to manufacture
• Noisier
• More pollutant
• Low acceleration due to high torque
• Required to run at lower RPM

6
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

7
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.

8
References

• http//hyperphysics.phy-astr.gsu.edu/hbase/thermo/
  diesel.html
• http//www.google.ca/search?hlenlrsafeoffrls
  GGGL,GGGL2005-09,GGGLenoidefmoredeflenqde
  fineDieselcycle
• http//auto.howstuffworks.com/diesel1.htm