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

Content:  Objective  Summary  Modeling  Results  Conclusion Mechatronics Simulation Project

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

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.

Mechatronics Simulation Project Proposal Presentation Single Cylinder Model: Model x 6 Input Pressure piston Output Crank

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  Eqn 8.16:  = F (-a sin  - (b 2 - a 2 sin 2  ) -1/2 a 2 sin  cos  )  a=stroke b=rod length

Mechatronics Simulation Project 20Sim Model:

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

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

Mechatronics Simulation Project Cylinder Force Data: 20Sim – Cylinder Force – All Cyl Force = Input Cylinder Pressure (psi) * Piston Area (12.54 in 2 )

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

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.

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.