Mapped Core Engine

Steady-state core engine model using lookup tables

• Library:

• Powertrain Blockset / Propulsion / Combustion Engine Components / Core Engine

• 

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Description

The Mapped Core Engine block implements a steady-state core engine model using power, air mass flow, fuel flow, exhaust temperature, efficiency, and emission performance lookup tables. You can use the block for:

• Hardware-in-the-loop (HIL) engine control design.

• Vehicle-level fuel economy and performance simulations.

The block enables you to specify lookup tables for these engine characteristics. The lookup tables are functions of engine load, L, and engine speed N. If you select Input engine temperature, the tables are also a function of engine temperature, T.

• Power

• Air

• Fuel

• Temperature

• Efficiency

• Emissions

  • Hydrocarbon (HC)

  • Carbon monoxide (CO)

  • Nitric oxide and nitrogen dioxide (NOx)

  • Carbon dioxide (CO₂)

  • Particulate matter (PM) emissions

To bound the Mapped Core Engine block output, the block does not extrapolate the lookup table data.

Ports

Input

<TrqCmd> — Engine load

TrqCmd (default)

Engine load, L. Examples of engine load include:

• Commanded torque

• Commanded indicated mean effective pressure (IMEP) in the engine cylinder

• Normalized cylinder air mass

• Injected fuel mass

Dependencies

To specify an engine load port name, on the Configuration tab, enter a name in the Load input port name parameter field.

<EngSpd> — Engine speed

EngSpd (default)

Engine speed, N.

Dependencies

To specify an engine load port name, on the Configuration tab, enter a name in the Speed input port name parameter field.

<EngTemp> — Engine temperature

EngTemp (default)

Engine temperature, T.

Dependencies

To create the engine temperature input port name, select Input engine temperature parameter field.

To specify an engine load port name, on the Configuration tab, enter a name in the Temperature input port name parameter field.

Output

<EngTrq> — Power

EngTrq (default)

Engine power, $T_{brake}$.

Dependencies

• To create this port, on the Configuration tab, select Power.

• To specify the port name, on the Power tab, enter a name in the Power output port name parameter field.

<IntkAirMassFlw> — Air mass flow

IntkAirMassFlw (default)

Engine air mass flow, ${\dot{m}}_{intk}$.

Dependencies

• To create this port, on the Configuration tab, select Air.

• To specify the port name, on the Air tab, enter a name in the Air output port name parameter field.

<FuelMassFlw> — Fuel flow

FuelMassFlw (default)

Engine fuel flow, ${\dot{m}}_{fuel}$.

Dependencies

• To create this port, on the Configuration tab, select Fuel.

• To specify the port name, on the Fuel tab, enter a name in the Fuel output port name parameter field.

<ExhManGasTemp> — Exhaust temperature

ExhManGasTemp (default)

Engine exhaust temperature, $T_{exh}$.

Dependencies

• To create this port, on the Configuration tab, select Temperature.

• To specify the port name, on the Temperature tab, enter a name in the Temperature output port name parameter field.

<Bsfc> — Efficiency

Bsfc (default)

Brake-specific fuel consumption (BSFC), Eff.

Dependencies

• To create this port, on the Configuration tab, select Efficiency.

• To specify the port name, on the Efficiency tab, enter a name in the Efficiency output port name parameter field.

<EoHC> — Hydrocarbon emissions

EoHC (default)

Hydrocarbon emissions, HC.

Dependencies

• To create this port, on the Configuration tab, select HC.

• To specify the port name, on the HC tab, enter a name in the HC output port name parameter field.

<EoCO> — Carbon monoxide emissions

EoCO (default)

Carbon monoxide emissions, CO.

Dependencies

• To create this port, on the Configuration tab, select CO.

• To specify the port name, on the CO tab, enter a name in the CO output port name parameter field.

<EoNOx> — Nitric oxide and nitrogen dioxide emissions

EoNOx (default)

Nitric oxide and nitrogen dioxide emissions, NOx.

Dependencies

• To create this port, on the Configuration tab, select NOx.

• To specify the port name, on the NOx tab, enter a name in the NOx output port name parameter field.

<EoCO2> — Carbon dioxide emissions

EoCO2 (default)

Carbon dioxide emissions, CO2.

Dependencies

• To create this port, on the Configuration tab, select CO2.

• To specify the port name, on the CO2 tab, enter a name in the CO2 output port name parameter field.

<EoPm> — Particulate matter emissions

EoPm (default)

Particulate matter emissions, PM.

Dependencies

• To create this port, on the Configuration tab, select PM.

• To specify the port name, on the PM tab, enter a name in the PM output port name parameter field.

Parameters

Configuration

Engine Type — Type of engine image

Compression-ignition (CI) (default) | Spark-ignition (SI)

Type of mapped internal combustion engine image to use in the block.

Load input port name — Name

TrqCmd (default)

Engine load input port name.

Breakpoints for load input — Breakpoints

vector

Breakpoints for engine load input.

Speed input port name — Name

EngSpd (default)

Speed input port name.

Breakpoints for speed input — Breakpoints

vector

Breakpoints for engine speed input.

Temperature input port name — Name

EngTemp (default)

Temperature input port name.

Dependencies

To enable this parameter, select Input engine temperature.

Breakpoints for temperature input — Breakpoints

[233.15 273.15 373.15] (default) | vector

Breakpoints for engine temperature input.

Dependencies

To enable this parameter, select Input engine temperature.

Output Configuration — Create output ports

on (default)

Create the output ports.

Dependencies

The table summarizes the output ports that are created for each Output parameter selection.

Output Selection	Creates Port	Creates Tab
Power	EngTrq	Power
Air	IntkAirMassFlw	Air
Fuel	FuelMassFlw	Fuel
Temperature	ExhManGasTemp	Temperature
Efficiency	Bsfc	Efficiency
HC	EoHC	HC
CO	EoCO	CO
NOx	EoNOx	NOx
CO2	EoCO2	CO2
PM	EoPm	PM

Power

Power output port name — Power

EngTrq (default)

Power output port name.

Dependencies

To create this parameter, on the Configuration tab, select Power.

Power table — Power

array

Power table.

Dependencies

To create this parameter, on the Configuration tab, select Power.

Air

Air output port name — Air

IntkAirMassFlw (default)

Air mass flow output port name.

Dependencies

To create this parameter, on the Configuration tab, select Air.

Air table — Air

array

Air mass flow table.

Dependencies

To create this parameter, on the Configuration tab, select Air.

Fuel

Fuel output port name — Fuel

FuelMassFlw (default)

Fuel output port name.

Dependencies

To create this parameter, on the Configuration tab, select Fuel.

Fuel table — Fuel

array

Fuel table.

Dependencies

To create this parameter, on the Configuration tab, select Fuel.

Temperature

Temperature output port name — Temperature

ExhManGasTemp (default)

Temperature output port name.

Dependencies

To create this parameter, on the Configuration tab, select Temperature.

Temperature table — Temperature

array

Temperature table.

Dependencies

To create this parameter, on the Configuration tab, select Temperature.

Efficiency

Efficiency output port name — Efficiency

Bsfc (default)

Efficiency output port name.

Dependencies

To create this parameter, on the Configuration tab, select Efficiency.

Efficiency table — Efficiency

array

Efficiency table.

Dependencies

To create this parameter, on the Configuration tab, select Efficiency.

HC

HC output port name — Hydrocarbon

EoHC (default)

Hydrocarbon output port name.

Dependencies

To create this parameter, on the Configuration tab, select HC.

HC table — Hydrocarbon

array

Hydrocarbon table.

Dependencies

To create this parameter, on the Configuration tab, select HC.

CO

CO output port name — Carbon dioxide

EoCO (default)

Carbon monoxide output port name.

Dependencies

To create this parameter, on the Configuration tab, select CO.

CO table — Carbon dioxide

array

Carbon dioxide table.

Dependencies

To create this parameter, on the Configuration tab, select CO.

NOx

NOx output port name — Nitric oxide NO and nitrogen dioxide NO₂

EoNOx (default)

NOx output port name. NOx is nitric oxide NO and nitrogen dioxide NO₂.

Dependencies

To create this parameter, on the Configuration tab, select NOx.

NOx table — Nitric oxide NO and nitrogen dioxide NO₂

array

NOx emissions table. NOx is nitric oxide NO and nitrogen dioxide NO₂.

Dependencies

To create this parameter, on the Configuration tab, select NOx.

CO2

CO2 output port name — Carbon dioxide

EoCO2 (default)

Carbon dioxide output port name.

Dependencies

To create this parameter, on the Configuration tab, select CO2.

CO2 table — Carbon dioxide

array

Carbon dioxide table.

Dependencies

To create this parameter, on the Configuration tab, select CO2.

PM

PM output port name — Particulate matter

EoPm (default)

Particulate matter output port name.

Dependencies

To create this parameter, on the Configuration tab, select PM.

PM table — Particulate matter

array

Particulate matter table.

Dependencies

To create this parameter, on the Configuration tab, select PM.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.