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Mechatronics Simulation Project

Mechatronics Simulation Project. IC Engine – Power Cylinder Modeling. Anthony R. Copp E579 - Mechatronic Modeling Spring 2006. Mechatronics Simulation Project. Content: Objective Summary Modeling Results Conclusion. Mechatronics Simulation Project. Objective

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Mechatronics Simulation Project

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  1. Mechatronics Simulation Project IC Engine – Power Cylinder Modeling Anthony R. Copp E579 - Mechatronic ModelingSpring 2006

  2. Mechatronics Simulation Project Content: • Objective • Summary • Modeling • Results • Conclusion

  3. Mechatronics Simulation Project Objective • Model a Six Cylinder 4.0L IC Engine • Observe total output torque • Observe “lump sum” resistance.

  4. 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.

  5. Mechatronics Simulation ProjectProposal Presentation Single Cylinder Model: Model x 6 Input Pressure function @ piston Output Torque @ Crank

  6. 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) • a=stroke b=rod length

  7. Mechatronics Simulation Project 20Sim Model:

  8. Mechatronics Simulation Project Cylinder Pressure Data: Peak Torque @ 3000 RPM. Average Pressure from 300 cycles for all 6 cylinders.

  9. Mechatronics Simulation Project Cylinder Pressure Data: Peak Torque @ 3000 RPM. 20Sim – File Input Data – All Cylinders

  10. Mechatronics Simulation Project Cylinder Force Data: 20Sim – Cylinder Force – All Cyl Force = Input Cylinder Pressure (psi) * Piston Area (12.54 in2)

  11. Mechatronics Simulation Project Output Torque = in–lb (3000 in-lb = 250 ft-lb)

  12. Mechatronics Simulation Project Results • Output: • w/ R=1.55 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.

  13. 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.

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