Internal Combustion Engine

1
Internal Combustion Engine

• By
• Jonathan Seals
• Brandon Sykes
• Nimeka Dupree
• Hilary Briscoe
• Kristoff Fajardo

2
Outline

• Concept
• Motors
• Electromagnetics
• Generation of electricity
• Internal Combustion Engine
• 4-stroke engine
• 2-stroke engine
• Device we built
• Data
• How can we improve?
• Conclusions

3
Motors

• Electromagnetic
• electrical current
• magnetic field
• magnetic poles
• brushes
• changes flow of electrons leading to spinning of
  motor

• Generation of electricity
• Wires connected to magnetic field
• Load

4
Parts

• Armature or rotor
• Commutator
• Brushes
• Axle
• Field magnet
• DC power supply

5
Internal Combustion Engine

• An electric spark ignites the fuel and air behind
  the piston, driving it forward and causing the
  crank to turn.
• The air/fuel mixture compresses in the crank
  case, releasing exhaust.
• As the piston bottoms out, more exhaust is
  pressed outward, filling the cylinder with a
  fresh fuel source.
• The momentum of the crank pushes the piston back
  into the cylinder, creating a vacuum in the crank
  case.
• As the piston keeps pushing back, the decreasing
  air pressure in the crank case pulls more fuel
  back into the crank case.

6
Our Device

• Our device is the same as the two-stroke
  generator. It has been modified to be more
  efficient.

7
Advantages

• Two stroke engines are small, lightweight, and
  inexpensive.
• Unlike four stroke engines, two stroke engines
  dont have valves, giving them a simpler
  construction.
• They have a significant power boost over a four
  stroke engine because two stroke engines have
  twice the number of power strokes per revolution.
• This gives it a greater power-to-weight ratio
  than a four stroke engine.

8
Disadvantages

• Two stroke engines dont last as long as four
  stroke engines because they arent as lubricated
  as much as they should be.
• This leads to greater friction, wearing out the
  parts and losing energy to heat.
• It requires a special oil that is expensive and
  needed in large amounts. (If used as a car
  engine, they would burn about a gallon of oil
  every thousand miles.)
• Theyre not fuel efficient. (As new fuel enters
  the cylinder, some of it spits out with the
  exhaust.)
• They emit a lot of pollution, releasing oily
  smoke and leaking more oil.

9
Hypothesized Results

• Manufacturers Data

10
Experimental Results
11
Experimental Results (cont.)

• Fuel Efficiency
• Energy Output
• PtE (6J/sec)(80sec)480J
• Mass of Fuel Used
• M1 57.2 M237.1 ?M20.1
• Efficiency
• Hypothesized value 11,000 J/g
• Actual value 23.9 J/g
• 23.9/11,000.002.2

12
How Can We Improve

• Try to develop an oil that is light and
  inexpensive.
• Develop a new system of piping so that fuel
  cannot eject out but the exhaust can.
• Devise a new clean-burning fuel.
• Encase engine in a sound-proof case.
• Mufflers

13
Technical Conclusion
We have a powerful and very useful engine that
people can really take advantage of, but we have
to do much research to harness a more efficient
way to producing that energy. There are many
advantages and also its disadvantages. As it
stands we can only obtain 0.2 conversion of fuel
to electricity efficiency. The engine needs a
better generator (transformer and magnet) and it
can work more efficiently.