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

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1

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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

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Exhaust CamPhaser

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Intake CamPhaser

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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?