Objective Determination of Minimum
 Engine M
 E i    Mapping Requirements for
              i  R    i      t f
Optimal SI ...
Topics
Problem Definition

Results Summary
               y

Problem Solving Approach
Problem-Solving

Conclusions an...
Problem Definition




Determine Minimum Number of Spark-Sweep
 Test-Points Required For Optimal Calibration
            ...
Results Summary
                                          Torque Residuals as a function of DoE Size
                     ...
Problem-Solving Approach




          5            2009-01-0246
Problem-Solving Approach

         52 Pt. Sobol Survey Test Design




           6                    2009-01-0246
Problem-Solving Approach
         5th Sobol Augmentation Design
                    (406 Pts)




          7             ...
Problem-Solving Approach
       2-Stage Model Definition




Local Model             Global Model
                8       ...
Problem-Solving Approach
        Optimal Calibrations From 52 Pt. Survey DoE
         p                                   ...
Problem-Solving Approach
  Exhaustive Calibration Development DoE

                               100 Cam-Phaser
         ...
Problem-Solving Approach
         Optimal Calibrations From Exhaustive DoE
          p




Optimal Calibrations From Final...
Problem-Solving Approach
                DoE Augmentation 5 Calibration vs Baseline Exhaustive Calibration
               ...
Conclusions And Next Steps
•~100 Spark Sweeps Required For DIVCP Calibration

•VCP Calibration Shapes Can Vary But Yield S...
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Objective Determination Of Minimum Engine Mapping Requirements For Optimal SI DIVCP Engine Calibration

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Transcript of "Objective Determination Of Minimum Engine Mapping Requirements For Optimal SI DIVCP Engine Calibration"

  1. 1. Objective Determination of Minimum Engine M E i Mapping Requirements for i R i t f Optimal SI DIVCP Engine Calibration Pete Maloney The MathWorks, Inc. ,
  2. 2. Topics Problem Definition Results Summary y Problem Solving Approach Problem-Solving Conclusions and Next Steps 2 2009-01-0246
  3. 3. Problem Definition Determine Minimum Number of Spark-Sweep Test-Points Required For Optimal Calibration 3 2009-01-0246
  4. 4. Results Summary Torque Residuals as a function of DoE Size 3 2 1 0 duals (Nm) -1 Torque Resid -2 Median M di Max Min -3 -4 -5 -6 -7 50 100 150 200 250 300 350 400 450 Number of DoE Points •Approximately 100 Spark-Sweeps Required to Optimally Calibrate This Type of Engine With a Workload Feasible 2 Stage Modeling Approach Workload-Feasible 2-Stage 4 2009-01-0246
  5. 5. Problem-Solving Approach 5 2009-01-0246
  6. 6. Problem-Solving Approach 52 Pt. Sobol Survey Test Design 6 2009-01-0246
  7. 7. Problem-Solving Approach 5th Sobol Augmentation Design (406 Pts) 7 2009-01-0246
  8. 8. Problem-Solving Approach 2-Stage Model Definition Local Model Global Model 8 2009-01-0246
  9. 9. Problem-Solving Approach Optimal Calibrations From 52 Pt. Survey DoE p y Optimal Calibrations From Final Augmentation: 406 Pt. DoE 5 9 2009-01-0246
  10. 10. Problem-Solving Approach Exhaustive Calibration Development DoE 100 Cam-Phaser Combinations at Each of 100 Calibration Table Breakpoints in Speed/Load (10,000 (10 000 Spark Sweeps) 10 2009-01-0246
  11. 11. Problem-Solving Approach Optimal Calibrations From Exhaustive DoE p Optimal Calibrations From Final Augmentation: 406 Pt. DoE 5 11 2009-01-0246
  12. 12. Problem-Solving Approach DoE Augmentation 5 Calibration vs Baseline Exhaustive Calibration g Spark Advance Residuals (DegBTDC) Intake Phaser Advance Residuals (DegCrank) Exhaust Phaser Retard Residuals (DegCrank) 0.9 10 0.9 10 0.9 10 8 8 8 0.8 0.8 0.8 6 6 6 0.7 0.7 0.7 4 4 4 0.6 0.6 0.6 2 2 2 %) %) Load (% ) Load (% Load (% 0.5 0 0.5 0 0.5 0 -2 -2 -2 0.4 0.4 0.4 -4 -4 -4 0.3 0.3 0.3 -6 -6 -6 0.2 0.2 0.2 -8 -8 -8 0.1 01 -10 10 0.1 01 -10 10 0.1 01 -10 10 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Speed (RPM) Speed (RPM) Speed (RPM) Torque Residuals (Nm) Residual Fraction Residuals (%) Torque Prediction Error (Nm) 0.9 2 0.9 5 0.9 10 1 4.5 45 8 0.8 0.8 0.8 0 4 6 0.7 0.7 0.7 -1 3.5 4 0.6 0.6 0.6 -2 3 2 Load (%) Load (%) Load (%) 0.5 -3 0.5 2.5 0.5 0 -4 2 -2 0.4 0.4 0.4 04 -5 1.5 -4 0.3 0.3 0.3 -6 1 -6 0.2 0.2 0.2 -7 0.5 -8 0.1 -8 0.1 0 0.1 -10 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Speed (RPM) Speed (RPM) Speed (RPM) •Engine Model Re-Tested At DoE 5 and Exhaustive Calibraiton Table Breakpoints 12 2009-01-0246
  13. 13. Conclusions And Next Steps •~100 Spark Sweeps Required For DIVCP Calibration •VCP Calibration Shapes Can Vary But Yield Similar Results •VCP Calibration Shapes Sensitive to Modeling Process •Sparser Version of Exhaustive Process Should Be Tried 13 2009-01-0246

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