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Build Hybrid Electric Vehicle P2 Model

The hybrid electric vehicle (HEV) P2 reference application represents a full HEV model with an internal combustion engine, transmission, battery, motor, and associated powertrain control algorithms. Use the reference application for hardware-in-the-loop (HIL) testing, tradeoff analysis, and control parameter optimization of a HEV P2 hybrid. To create and open a working copy of the reference application project, enter

autoblkHevP2Start
By default, the HEV P2 reference application is configured with:

  • Lithium-ion battery pack

  • Mapped electric motor

  • Mapped spark-ignition (SI) engine

This diagram shows the powertrain configuration.

Note

The Virtual Vehicle Composer configures the reference application. If you want to the change the configuration, use the Virtual Vehicle Composer to specify a different powertrain and vehicle.

This table describes the blocks and subsystems in the reference application.

Reference Application ElementDescription

Analyze Power and Energy

Double-click Analyze Power and Energy to open a live script. Run the script to evaluate and report power and energy consumption at the component- and system-level. For more information about the live script, see Analyze Power and Energy.

Scenarios

Implements the Drive Cycle Source block to generate a FTP75 (2474 seconds) drive cycle.

Environment

Creates environment variables, including road grade, wind velocity, and ambient temperature and pressure.

Driver Commands

Implements the Longitudinal Driver to generate normalized acceleration and braking commands.

Controllers

Implements a powertrain control unit containing a hybrid vehicle control unit (VCU) and an engine control unit (ECU).

Vehicle

Implements a hybrid passenger car that contains drivetrain, electric plant, and engine subsystems.

Visualization

Displays vehicle-level performance, battery state of charge (SOC), fuel economy, and emission results that are useful for powertrain matching and component selection analysis.

Evaluate and Report Power and Energy

Double-click Analyze Power and Energy to open a live script. Run the script to evaluate and report power and energy consumption at the component- and system-level. For more information about the live script, see Analyze Power and Energy.

The script provides:

  • An overall energy summary that you can export to an Excel® spreadsheet.

  • Engine plant, electric plant, and drivetrain plant efficiencies, including an engine histogram of time spent at the different engine plant efficiencies.

  • Data logging so that you can use the Simulation Data Inspector to analyze the powertrain efficiency and energy transfer signals.

Controllers

The Controller subsystem implements the hybrid vehicle control unit (VCU), engine control unit (ECU), transmission control unit (TCU), and open loop braking control.

This table describes the Controller subsystem implementation.

ElementDescription

VCU

Implements the Equivalent Consumption Minimization Strategy block and series regenerative braking control.

ECU

Implements the SI Controller block.

TCU

Sets the transmission gear state according to vehicle speed thresholds for gear shifting. The thresholds are defined by 2D lookup tables of powertrain load and gear state.

Vehicle

The Virtual Vehicle Composer configures the reference application vehicle subsystem. If you want to the change the configuration, use the Virtual Vehicle Composer to specify a different powertrain and vehicle.

The hybrid vehicle has the characteristics provided in this table.

ElementDescription

Dual clutch transmission (DCT)

Implements the Ideal Fixed Gear Transmission block to configure an ideal fixed gear transmission without clutch or synchronization.

Wheels and Brakes

Implements the Longitudinal Wheel block with disc brakes to configure drivetrain for front wheel drive.

Vehicle Body

Implements the Vehicle Body 3DOF Longitudinal block to configure vehicle for 3 degrees-of-freedom.

Engine

Implements the Mapped SI Engine block.

Battery and DC-DC Converter

Implements the Datasheet Battery block to configure a lithium-ion battery pack.

Motors

Implements the Mapped Motor blocks with implicit controllers.

Acknowledgment

MathWorks® would like to acknowledge the contribution of Dr. Simona Onori to the ECMS optimal control algorithm implemented in this reference application. Dr. Onori is a Professor of Energy Resources Engineering at Stanford University. Her research interests include electrochemical modeling, estimation and optimization of energy storage devices for automotive and grid-level applications, hybrid and electric vehicles modeling and control, PDE modeling, and model-order reduction and estimation of emission mitigation systems. She is a senior member of IEEE®.

References

[1] Balazs, A., Morra, E., and Pischinger, S., Optimization of Electrified Powertrains for City Cars. SAE Technical Paper 2011-01-2451. Warrendale, PA: SAE International Journal of Alternative Powertrains, 2012.

[2] Onori, S., Serrao, L., and Rizzoni, G., Hybrid Electric Vehicles Energy Management Systems. New York: Springer, 2016.

See Also

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