Virtual Engine Calibration Optimization (VECO)
Transcript of Virtual Engine Calibration Optimization (VECO)
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1© 2015 The MathWorks, Inc.
Virtual Engine Calibration Optimization (VECO)
Peter J Maloney, MathWorks Consulting
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Outline
§ Calibration After Engine Build Slows Design Iterations By About 4 Years
§ 4 Year Design Iteration Delay Can Be Removed With
– GT-POWER co-simulation (Simulink)
– Direct optimization of engine calibration maps (StateFlow)
– Rapid calibration development (Parallel Computing)
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Base Engine Calibration Problem Addressed by VECO
Cylinder PressureàTorque
(15 Operating Levels)
Speed (15 Operating Levels)
IgnitionTiming
FuelàAir/Fuel Ratio
ThrottlePosition
Pressure
Turbo WastegateAreaPressure
23
1
4
Exhaust Cam PhasingàNOx6
Intake Cam Phasing5
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Calibrations Produced By VECO Process
15 Engine SpeedsX
15 Engine TorquesX6 Variables
1350 Calibration Values
Engine Controller
Throttle Position
Turbo Wastegate Area
Ignition Timing Air/Fuel Ratio
2
3
1 4
Exhaust CamPhaser
6
Intake CamPhaser
5
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Example VECO At One Operating Point
1.5L SI DOHC I4 GDI Dual VCP Turbo Application Example
Brake-Specific Fuel Consumption(BSFC)
Ignition Timing
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Parallel Computing Used for 225x Speed-Up
Torque
Speed
Automated Base EngineCalibration Maps In 2hrs!
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Summary§ Engine Calibration Is a Major Bottleneck in Engine Design Process
§ VECO Process For SI Engine Removes Base Calibration Bottleneck
§ VECO Is Practical For Everyday Use Due To Parallel Computing
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Questions?