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

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Content: Objective Summary Modeling Results Conclusion Mechatronics Simulation Project

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

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Mechatronics Simulation Project Proposal 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 Project Proposal Presentation Single Cylinder Model: Model x 6 Input Pressure function @ piston Output Torque @ 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: = F (-a sin - (b 2 - a 2 sin 2 ) -1/2 a 2 sin cos ) a=stroke b=rod length

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Mechatronics Simulation Project 20Sim Model:

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

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Mechatronics Simulation Project Cylinder Pressure Data: Peak Torque @ 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 in 2 )

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

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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.

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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.

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