If you have Model-Based Calibration Toolbox™ and Stateflow®, you can use the engine dynamometer reference application to generate lookup tables for the Mapped SI Engine block. The reference application uses engine data to calibrate the engine and generate the tables.
If it is not opened, open the reference application.
Click Generate Mapped Engine from Spreadsheet.
Use the Spreadsheet file field to provide a data
file. By default, the reference application has
SiEngineData.xlsx
containing required and optional
data. The tables summarize the data file requirements for generating
calibrated tables that are functions of either injected fuel mass or engine
torque and engine speed.
Firing data contains data collected at different engine torques and speeds.
Firing Data | Description | Data Requirements for Generating Mapped Engine Tables |
---|---|---|
FuelMassCmd | Injected fuel mass, in mg per injection | Not Used |
Torque | Engine torque command, in N·m | Required |
EngSpd | Engine speed, in rpm | Required |
AirMassFlwRate | Air mass flow, in kg/s | Optional |
FuelMassFlwRate | Fuel mass flow, in kg/s | Optional |
ExhTemp | Exhaust temperature, in K | Optional |
BSFC | Engine brake-specific fuel consumption (BSFC), in g/kWh | Optional |
HCMassFlwRate | Hydrocarbon emission mass flow, in kg/s | Optional |
COMassFlwRate | Carbon monoxide emission mass flow, in kg/s | Optional |
NOxMassFlwRate | Nitric oxide and nitrogen dioxide emissions mass flow, in kg/s | Optional |
CO2MassFlwRate | Carbon dioxide emission mass flow, in kg/s | Optional |
PMMassFlwRate | Particulate matter emission mass flow, in kg/s | Optional |
Nonfiring data contains data collected at different engine speeds without fuel consumption.
Nonfiring Data | Description | Data Requirements for Generating Mapped Engine Tables |
---|---|---|
FuelMassCmd | Injected fuel mass, in mg per injection | Not used |
Torque | Engine torque command, in N·m | Required |
EngSpd | Engine speed, in rpm | Required |
AirMassFlwRate | Air mass flow, in kg/s | Optional |
Click Generate mapped engine calibration to generate response surface models in the Model-Based Calibration Toolbox and calibration in CAGE (CAlibration GEneration). CAGE and the model browser open when the process completes. To calibrate the data, Model-Based Calibration Toolbox uses templates.
The Model Browser provides the response model fits for the data contained in the data file, for example:
The CAGE Browser provides the calibrated data, for example:
When you click Apply calibration to mapped engine model, Powertrain Blockset™:
Updates the Mapped SI Engine block parameters with the calibrated table and breakpoint data.
Sets the Mapped SI Engine as the active variant.
Executes the engine mapping experiment.
When the dynamometer engine mapping completes, use the Simulation Data Inspector to verify the results.
Mapped SI Engine | SI Core Engine