Mechatronics Simulation Project

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Mechatronics Simulation Project

• IC Engine Power Cylinder Modeling

Anthony R. Copp E579 - Mechatronic
ModelingSpring 2006
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Mechatronics Simulation Project

• Content
• Objective
• Summary
• Modeling
• Results
• Conclusion

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Mechatronics Simulation Project

• Objective
• Model a Six Cylinder 4.0L IC Engine
• Observe total output torque
• Observe lump sum resistance.

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Mechatronics Simulation ProjectProposal
Presentation

• Summary
• Input Data Obtained real world dynamometer
  data.
• Cyl Pressure Data, Torque Data, Engine
  Parameters
• Transposed Cylinder Pressure Data to Function
  format for each individual cylinder i.e.
  converted from crank angle to time based.
• Constructed 20Sim Model. Used real world data as
  input to MSe.
• Enter parameters and ran 20Sim simulation.
• Compared Torque output of model to real data.
  Altered R element to achieve comparable torque
  output.

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Mechatronics Simulation ProjectProposal
Presentation
Single Cylinder Model Model x 6 Input Pressure
function _at_ piston Output Torque _at_ Crank
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Mechatronics Simulation Project

• Model Construction
• 6 MSe Legs 6 Cylinders
• File Input Data Converted Data in to text file,
  linked to appropriate cylinder MSe.
• 1 Junction Crankshaft
• Integrate takes flow data (angular velocity)
  and integrates it to crank angle. Feeds back into
  MTF to calculate the torque per eqn 8.16.
• Eqn 8.16 t F (-a sin q - (b2 - a2 sin2 q) -1/2
  a2 sin q cos q)
• astroke brod length

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Mechatronics Simulation Project
20Sim Model
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Mechatronics Simulation Project
Cylinder Pressure Data Peak Torque _at_ 3000
RPM. Average Pressure from 300 cycles for all 6
cylinders.
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Mechatronics Simulation Project
Cylinder Pressure Data Peak Torque _at_ 3000
RPM. 20Sim File Input Data All Cylinders
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Mechatronics Simulation Project
Cylinder Force Data 20Sim Cylinder Force
All Cyl Force Input Cylinder Pressure (psi)
Piston Area (12.54 in2)
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Mechatronics Simulation Project
Output Torque inlb (3000 in-lb 250 ft-lb)
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Mechatronics Simulation Project

• Results
• Output
• w/ R1.55 in-lb-s / rad
• Ave Torque 2900 in-lb (242 ft-lb)
• Max Torque for test data used 243 ft-lb
• Removed I element.
• Caused radical data plots and no change with
  parameter setting.

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Mechatronics Simulation Project

• Conclusion
• Could provide good info with more model
  refinement more details, more parameters.
• Had a lot of issues getting model to operate
  properly.
• Units.