Modeling Engine Heat Distribution

This two-day class will introduce the use of GT-SUITE software for modeling the distribution of heat within the engine thermal structure. Engine heat distribution models allow the prediction of heat rejection to coolant/oil at any operating condition, and may be used to study concepts for reducing fuel consumption by optimizing energy flows to minimize friction during transient warmup events.  The course is targeted towards engineers with responsibility for powertrain cooling, friction reduction, or total vehicle energy management.

This course will cover the process of building and calibrating an engine heat distribution model, beginning from engine CAD data.  The process involves significant use of the 3D pre-processing tools of GT-SUITE (GEM3D and GT-SPACECLAIM).  The following are the primary topics to be covered:

• Conversion of coolant jackets from CAD Data
• Conversion of block/head thermal masses from CAD Data
• Modeling the cylinder structure with 3D finite elements
• Modeling lubrication oil
• Calibration of heat transfer
• Options for modeling engine friction
• Integration with engine performance model and vehicle cooling circuits

 

Note:  This course may be offered as a future open registration event OR requested as a custom training at a GTI office location or your location.

Fast Running Engine Models (FRMs) for Integrated Simulations (including Real-Time/SiL/HiL)

This course will cover the creation of Fast Running Engine Models (FRMs) from their detailed equivalent, so they can be used in a variety of integrated simulations.  FRMs execute much more rapidly than the typical detailed GT-POWER engine model, and are ideal for integrating with other vehicle systems where an accurate and predictive engine plant model is desired and where computational speed is critical.  FRMs adapt to changing conditions (e.g. valve timing, spark/injection timing, turbo lag, external temperature, altitude, cooling system conditions, etc.) without the need to apply non-physical correction factors.  Whether studying changes to ambient conditions, or simulating events that are heavily transient in nature, FRMs will maintain the predictive capabilities of a detailed engine model while allowing for the fast computational speeds that are expected when performing drive cycle analysis and other transient-focused simulations.

Some examples of applications that are ideal for FRMs are:

• ECU Modeling (including HiL) – where a fast-running and transient-capable engine model is essential for optimizing ECU strategy
• Engine + Drivetrain/Vehicle – where accurate torque pulsations are key for optimizing drivetrain design and strategy
• Vehicle Thermal Management modeling, where the engine provides the heat to the cooling system, and the cooling system behavior feeds back into the engine performance predictions (great for simulating off-ambient conditions)
• And many more.

In addition to covering the complete conversion process of going from a detailed engine model into an FRM, this class will also cover special considerations that may come up depending on the intended use of the FRM.  An agenda of this class is below:

1. Brief introductions to FRMs and their applications
2. Converting a Detailed GT-POWER model into an FRM
   1. Reviewing the baseline detailed model
   2. Simplifying each subsystem of the detailed model
   3. Additional modifications for achieving even faster run times
3. Discussion of application-specific considerations when making an FRM
   1. Real-Time and Hardware-in-the-Loop modeling
   2. Engine Cooling and Heat Rejection
   3. Aftertreatment modeling
4. Discussion of Transient Simulations using GT-SUITE (including Controls)

Transmission and Driveline Modeling

This course is intended for new and existing GT-SUITE users interested in developing detailed transmission and driveline models. The focus of the course will be modeling the internals of the transmission, including the rotational and axial mechanics and the clutch actuation systems. Coupling the detailed transmission model to an engine and vehicle model will also be accomplished to evaluate shift quality.

Introductory Concepts of GT-SUITE :

• 1-D hydraulic control systems for actuators (control valves and pressure regulating valves)
• Model-building from CAD data
• 1-D torsional driveline modeling
• Wet clutch models
• Integration with Simulink

The class will include discussion of detailed, predictive component models in which the fluid-mechanical interaction is important.  Most of the instruction will be based on interactive model building, but may also include demonstrations from the instructor and guided examination/analysis of pre-built models.  Below is a list of common topics that can be prioritized based on the audience.

 

The following modeling topics may be included:

• System-Level Transmission Modeling
  • Shift Strategy Generation
• Torsional vibration analysis
  • Time and frequency domain
  • Integration of GT-POWER engine model
  • Torsional damper modeling
• Real Time Modeling
  • Model preparation and reduction for HiL applications
  • Supported platforms
• General GT-SUITE topics
  • Fluid properties
  • Cavitation and aeration
  • Optimization and DOEs
  • Others

Note:  This course may be offered as a future open registration event OR requested as a custom training at a GTI office location or your location.

 

Valvetrain Modeling

Vehicle Cooling Systems

Air Conditioning, Heat Pump, and Ventilation Systems (HVAC Climate)

This two-day class will introduce the use of GT-SUITE software for modeling of air conditioning or heat pump systems, including the refrigerant circuit, HVAC ducting, and cabin.  The course is targeted towards engineers with responsibility for design and analysis of A/C systems, or for those who are responsible for overall vehicle energy management including an A/C system.

The class will consist primarily of interactive model building exercises.  The following are the primary topics to be covered:

Modeling the refrigerant flow network:  The participant will learn how to build a model of the refrigerant flow network by two methods.  First, the participant will learn how to build flow components manually to understand basic modeling and discretization concepts.  Second, the participant will learn how to quickly and easily transform a 3D CAD geometry file into a 1D flow network in GT-SUITE using the pre-processing tool GEM3D.

Modeling A/C system components:  The participant will learn how to build and calibrate the basic components of A/C systems, such as compressor, receiver/dryer, thermal expansion valve, and heat exchangers.  The participant will also learn how the COOL3D pre-processing tool can be used to build and automatically discretize more complex scenarios (non-uniform inlet air flow, for example).

Assembling the complete A/C system model for system level calculations:  The participant will learn how to assemble the refrigerant flow network and A/C components into a complete model of the A/C system. Steady state and transient analysis of this system will be discussed.  The participant will learn the basics of the GT-POST post-processing tool for all analysis of results.

Modeling air circuits:  Modeling of the HVAC ducting and blower will be discussed.  The participant will also learn how the model could be extended to include a more complete model of the underhood air path (cooling module or complete underhood).

Modeling the vehicle cabin:  The participant will learn about the different levels of modeling detail available for modeling the cabin within GT-SUITE.  The use of COOL3D to create a detailed 3-D cabin model will be discussed.

Integration with Cooling/Engine/Vehicle models:  The participant will understand the capabilities of GT-SUITE to integrate A/C system models into larger vehicle system level simulations that may include cooling, engine, and driveline systems.  Cabin pulldown transient simulations will be discussed, as well as transient drive cycle analysis for fuel economy/energy management (i.e. US EPA SC03 cycle).

Note: This course may be offered as a future open registration event OR requested as a custom training at a GTI office location or your location.

Lubrication Systems

This class is intended to show engineers how to model a lubrication circuit in GT-SUITE and to introduce basic modeling concepts in GT-SUITE.  The participant will be able to understand in detail the advantage of GT-SUITE compared to previous modeling methodologies of lube circuits.  The participant will also discover a new way of creating an oil circuit model directly from a CAD File, which is a true alternative & technological breakthrough to efficiently generate 1D lubrication circuit models.

1. How to Build a Model from a CAD File: The participant will learn how to transform a CAD File into a 1D lubrication model in GT-SUITE using the GEM3D pre-processor.
2. How to Model Oil Circuit Components in GT-SUITE: The participant will learn how to construct a lubrication model from scratch, including oil passages, bearings, relief valve, and pump.
3. Analyze Results in GT-POST: The participant will learn how to analyze results of a lubrication model, including a breakdown of the oil flow distribution to various consumers, as well as performing an engine speed and temperature sweep to see how these variables affect results.
4. How to Model Important Oil Circuit Behavior: The instructor will show that the following types of oil circuit analysis can be performed in GT-SUITE:
   • Steady state
   • Priming/filling
   • Transient thermal oil response (both temperature and engine speed changing)
   • Pump power/energy consumption over driving cycle
   • Detailed pump analysis
5. Introductory GT-SUITE Concepts: In addition to lubrication specific modeling, this course will also focus on the basics of using GT-SUITE, including:
   • 1-D Flow Simulation
   • Discretization of 1-D Models
   • Model Setup- initialization, parameter sweeps, convergence
   • Post-processing (GT-POST)
   • Modeling of pipes & fluid components
   • Fluid Properties

Note:  This course may be offered as a future open registration event OR requested as a custom training at a GTI office location or your location.

GT-DRIVE+ HEV and EV Modeling

This course is intended for those interested in developing Hybrid Electric Vehicle or pure Electric Vehicle models for fuel economy or range studies.  The following topics will be covered in this course:

Introductory Concepts of GT-SUITE :

• 1-D Mechanical Simulation
• Model Setup- initialization, parameters sweeps, Optimization/Design of Experiments
• Post-processing (GT-POST)
• Subassemblies: internal, external, encryption of subassemblies

The following vehicle modeling topics will be included:

• Conventional Vehicle
  • Mapped Engine Model
  • Transmissions (Automatic, Manual, CVT, Other)
  • Vehicle
• Hybrid Electric Components
  • Battery
  • Electric Motors
  • Energy Management Controls
• Engine Start/Stop
• Electric Launch and Assist
• Regenerative Braking
• Driving Cycle Analysis (with Model Based Targeting Controller)

If time permits, extra and more specialized topics may be covered.  The topics will selected by the participants.  Some possible topics are:  Advanced Control Strategies, Plug-in Hybrids, Integrated Simulations (e.g HEV+Fast Running detailed engine Model, HEV + Vehicle Thermal Management), Circuit-based modeling of electrical components, Simulink coupling for controls, user-defined

Note:  This course may be offered as a future open registration event OR requested as a custom training at a GTI office location or your location.

GT-DRIVE+ Conventional Vehicle Modeling

This course is intended for those interested in developing vehicle models for fuel economy studies as well as dynamic performance tests.  The following topics will be covered in this course:

Introductory Concepts of GT-SUITE :

• 1-D Mechanical Simulation
• Model Setup- initialization, parameter sweeps, Optimization/Design of Experiments
• Post-processing (GT-POST)
• Subassemblies: internal, external, encryption of subassemblies

The following vehicle modeling topics will be included:

• Mapped Engine Model
• Transmissions (Automatic, Manual, CVT, Other)
• Tire Modeling
• Vehicle
• Acceleration Studies (0-100 kph, ¼ mile, etc.)
• Driver Controls (for Automatic or Manual Transmissions)
• Driving Cycle Analysis (with Model Based Targeting Controller)
• Alternative Analysis Modes (Static calculations)

If time permits, extra and more specialized topics may be covered.  The topics will selected by the participants.  Some possible topics are:  Detailed Transmission Modeling, Drivetrain Torsional Analysis and Driveability, Advanced Control Strategies, Integrated Simulations (e.g drivetrain + Fast Running detailed engine Model, drivetrain +cranktrain), user-defined

Note:  This course may be offered as a future open registration event OR requested as a custom training at a GTI office location or your location.

Hydraulic and Injection Components and Systems Modeling

This course will introduce engineers to modeling fuel injection and hydraulic components as well as complete hydraulic systems in GT-SUITE.  This includes, but is not limited to, the following:

• Pumps and valves (control valves, pressure regulators, etc.)
• Fuel injection components (high-pressure pumps, injectors, regulating valves, etc.)
• Variable valvetrains with hydraulic actuation
• Cam phasers
• Compression release brakes with hydraulic actuation
• Exhaust valve control for large 2-stroke engines=Gearbox/transmission hydraulic actuation

The class will include discussion of detailed, predictive component models in which the fluid-mechanical interaction is important.  Most of the instruction will be based on interactive model building, but may also include demonstrations from the instructor and guided examination/analysis of pre-built models.  Below is a list of common topics that can be prioritized based on the audience.

1. Modeling the flow network: build a model of the flow network by two methods.  First, the participant will learn how to build flow components manually to understand basic modeling and discretization concepts.  Second, a 3D CAD file will be quickly and easily transformed in to a 1D flow network model using the GT-SUITE pre-processor, GEM3D.
2. Modeling hydraulic and injection components: create detailed, predictive models of hydraulic components in which the fluid-mechanical interaction is important.  Examples of the components to be discussed include high pressure pumps, pressure control valves, injectors, etc.
3. Modeling pumps: discussion of different levels of models as well as the different types of pumps.  Pressure pulsation and flow ripple predictions will also be analyzed.
4. Modeling a hydraulic system: build a model of the full system.  Various levels of detail for modeling the hydraulic components (pumps, valves, etc.) will be discussed, ranging from imposing the behavior to predicting it.  Pressure waves in the system as well as thermal effects in a closed-loop circuit will be analyzed.
5. Integration of hydraulics with 2D and 3D multi-body dynamics: link hydraulics to 2D and 3D mechanical components.  Typical applications include detailed (2D) spring modeling, detailed dynamics of pumps including cam to follower tribology, cam shaft torsion and bending, mobile hydraulic equipment, etc.
6. Injection rate modeling for predictive combustion: various options for modeling the injection rate needed for predictive combustion models.  This ranges from imposing the injection rate to integrating a detailed injector in the engine performance model.
7. General GT-SUITE topics: In addition to the above topics, this course will also discuss some of the general features in GT-SUITE, including:
   • Solver options (explicit vs. implicit)
   • Fluid properties
   • Cavitation and aeration
   • Model Setup- initialization, parameters sweeps, convergence
   • Optimization and DOE
   • Simulink co-simulation
   • User-created compound templates
   • User routines

Note:  This course may be offered as a future open registration event OR requested as a custom training at a GTI office location or your location.

Advanced Turbocharger Modeling

This course will focus on the simulation of turbocharged IC engines.  It has been designed for automotive engineers who already have experience using GT to simulate engines, want to learn how to model turbochargers and techniques that improve the speed and results of models.  The class will include interactive work in GT using a model provided by GTI.

Modeling turbocharged engines using GT (also covered in our Engine Modeling training)

• Modeling of turbochargers
• Map fitting and extrapolation
• Intercooling methods: simple, semi-predictive and predictive
• Convergence
• Transients

Control of a wastegate or VG rack to meet a desired target (pressure, torque, BMEP, etc)

Other potential turbocharging topics (to be decided by the participants)

• Matching turbochargers to engines using TurboMapMatch
• Using mean value cylinders to study advanced turbocharging concepts (two-stage, turbocompounding, e-boost, etc.)
• CompressorSimple and TurbineSimple (no map data needed)
• Calibration of controls when more than one is present (e.g., wastegate and EGR)
• Advanced map fitting and analysis techniques

Other topics proposed by participants

Note:  This course may be offered as a future open registration event OR requested as a custom training at a GTI office location or your location.

 

Cranktrain Modeling

This course is designed for those interested in Cranktrain modeling and analysis in GT-SUITE.  It will focus on the simulation of engine cranktrain dynamics through the use of GT-SUITE.  The following topics will be covered:

Introductory Concepts of GT-SUITE:

• 2-D Mechanical Simulation
• Model Setup- initialization, parameters sweeps, Optimization/Design of Experiments
• Post-processing (GT-POST)
• Subassemblies and User Compounds

Rigid Crankshaft Analysis

• Crankshaft Balancing
• Cylinder Pressure Boundary Conditions Applied

Crankshaft Torsional Analysis

• Time Domain Solution with Steady State Convergence
• Frequency Domain Solutions (Free and Forced)

Crankshaft Quasi-Static and Dynamic Bending Solution

• Fillet Stress Calculations Based on Dynamic Loading
• Coupled Journal Bearing Solution

If time permits, extra and more specialized topics may be covered.  The topics will selected by the participants.  Some possible topics are:  Block Vibration, Integrated Simulations (e.g cranktrain + valvetrain, cranktrain + drivetrain), Transient simulations, user-supplied

Note:  This course may be offered as a future open registration event OR requested as a custom training at a GTI office location or your location.

Mean Value and Real Time Engine Modeling

This course introduces mean value cylinder engine modeling and focuses on the method by which a detailed engine model can be simplified to a mean value engine model.  A mean value model uses a simplified neural network-based engine cylinder, as well as a simplified intake and exhaust system.  This results in a model that executes much more rapidly than the typical detailed GT-POWER engine model.  The speed of a mean value model simulation makes these types of models useful for vehicle or control system level transient simulations where computation speed is critical.  Mean value models may be used for both software in the loop (SiL) simulations or hardware in the loop (HiL) simulations.  The course will include introductions to Design of Experiments (DOE) and neural network control capabilities in GT-SUITE, as these tools are integral to mean value modeling.  Each student will participate in the class by converting an example detailed model to a mean value model.

• Introduction to mean value modeling
• Conversion of detailed model to mean value model
  • Characterizing the detailed model using DOE
  • Training neural networks to control mean value cylinder
  • Simplifying intake and exhaust systems
  • Model calibration and other considerations
• Running a mean value model on an RT system
  • Preparing a mean value model to run RT
  • Setting up a coupled Simulink RT model
  • General description HiL capabilities and supported vendors

Note:  This course may be offered as a future open registration event OR requested as a custom training at a GTI office location or your location.

Exhaust Aftertreatment Modeling

This course is intended for users interested in learning how to model exhaust aftertreatment systems for gasoline and diesel engines.  The class will include discussion of exhaust aftertreatment modeling theory, and construction of exhaust aftertreatment system models.

The following topics will be discussed in detail:

• TWC, DPF, SCR, and other exhaust aftertreatment devices
• Modeling of chemical kinetic reactions for catalysts
• Soot filtration and regeneration models for DPFs
• Techniques for calibrating DPF pressure drop and soot regeneration
• Techniques for calibrating kinetic reaction mechanisms
• 0D, 1D, 2D, and 3D heat transfer modeling options
• Compounds and subassemblies for encryption of sensitive reaction information

Note:  This course may be offered as a future open registration event OR requested as a custom training at a GTI office location or your location.

Engine Intake and Exhaust System Flow and Acoustic Modeling

This course is designed for newer users of GT-POWER that are interested in modeling intake and exhaust systems of internal combustion engines, as well as acoustics.  This course will specifically focus on simulation of intake and exhaust systems, including resonators, airboxes, catalysts, and mufflers.  The course will include the construction of models and use of the software, which will enable the participants to use the software immediately.  It will cover the following topics:

Introductory concepts of GT-SUITE :

• 1-D flow simulation
• Discretization of 1-D models
• Model setup – initialization, parameters sweeps, convergence
• Optimization/Design of Experiments
• Post-processing (GT-POST)
• Subassemblies: internal, external, encryption of subassemblies

The following intake and exhaust topics will be covered and examples will be provided:

• Building intake and exhaust systems for an existing engine model
• Modeling of: resonator, airbox, catalyst, muffler
• Using GEM3D to import CAD geometry or build a 3D model and convert it into a 1D model
• Modeling pressure losses in an intake/exhaust systems
• Acoustic analysis
  • Transmission loss
  • Predicting SPL at an external microphone
  • Making sound files from simulation (WAV format)
  • Pass-by noise simulation

If time permits at the end of the class, additional topics can be covered, including: Insertion Loss, Noise Reduction, Transient Noise Simulation, Multiple Noise Source Modeling (dual exhaust), ‘Data-only’ Fast Acoustic Calculations, Porous Intake Pipe Modeling, Exhaust Aftertreatment

Note: This course may be offered as a future open registration event OR requested as a custom training at a GTI office location or your location.

Interfaces for Co-Sim, SiL and HiL Seminar

This seminar focuses on the ways GT-SUITE can be used in combination with external modeling software to simulate the powertrain or its subsystems.  Special attention will be given to Software-in-the-Loop (SiL) and Hardware-in-the-Loop (HiL) applications.  Topics on the agenda will include:

1. Importing external models for co-simulation in GT-SUITE
2. Executing standalone GT-SUITE models from an external application
3. Exporting GT-SUITE models for co-simulation in an external application
4. Advanced interfacing and co-simulation features
5. Workflow from a standalone GT model to a SiL and a HiL application
6. Recommended practices for hard real-time requirements

A SiL and a HiL demo will be presented in the end of the seminar, using one of the popular SiL and HiL platforms in the automotive industry.

Advanced Engine Modeling (GT-POWER)

Engine Modeling (GT-POWER)

To see if this course is being offered at a nearby training facility, please check the list of upcoming classes. 

This course is designed for newer users that are interested in modeling internal combustion engines.  This course will focus on engine simulation through the use of GT-POWER.  The course will include the construction of models and use of the software, which will enable the participants to use the software immediately.  It will cover the following topics:

Introductory Concepts of GT-SUITE :

• 1-D Flow Simulation
• Discretization of 1-D Models
• Model Setup- initialization, parameters sweeps, convergence
• Optimization/Design of Experiments
• Post-processing (GT-POST)
• Subassemblies: internal, external, encryption of subassemblies

The following engine modeling topics will be included:

• Modeling of: manifolds, valves, combustion, heat transfer and fuel Non-Predictive Combustion for Gasoline/Ethanol/ Diesel Engines
• Cylinder Pressure Analysis
• Turbochargers
• EGR
• Controls Library
• Transient Simulation
• Predictive Combustion Modeling

If time permits at the end of the class, additional topics can be covered including introductions to: Acoustics, Coupling with Simulink, CFD Coupling, and Exhaust Aftertreatment.

Note:  This course may be offered as a future open registration event OR requested as a custom training at a GTI office location or your location.

Rankine Cycle Waste Heat Recovery Systems

This two-day class will introduce the use of GT-SUITE software for modeling of Rankine cycle based waste heat recovery systems.  The course is targeted towards engineers with responsibility for design and analysis of WHR systems, or for those who are responsible for overall vehicle energy management including a WHR system.

The class will consist primarily of interactive model building exercises.  The following are the primary topics to be covered:

Modeling a “theoretical” system: The participant will learn how to build a reasonable WHR system in early stages when no component data is yet available, for purposes of studying the potential fuel economy benefits of a WHR system (“what if” studies).

Modeling the refrigerant flow network: The participant will learn how to build a model of the refrigerant flow network by two methods.  First, the participant will learn how to build flow components manually to understand basic modeling and discretization concepts.  Second, the participant will learn how to quickly and easily transform a 3D CAD geometry file into a 1D flow network in GT-SUITE using the pre-processing tool GEM3D.

Modeling WHR system components: The participant will learn how to build and calibrate the basic components of WHR systems, such as pump, boiler, expander, condenser, recuperator, etc.

Assembling the complete WHR system model for steady state calculation: The participant will learn how to assemble the refrigerant flow network and WHR components into a complete model of the WHR system.  Steady state analysis of this system will be discussed, along with calibration to measured data.  The participant will learn the basics of the GT-POST post-processing tool for all analysis of results.

Integration with Cooling/Engine/Vehicle models: The participant will understand the capabilities of GT-SUITE to integrate WHR system models into larger vehicle system level simulations that may include cooling, engine, and driveline systems.  Transient drive cycle analysis for fuel economy/energy management will be discussed.

Note: This course may be offered as a future open registration event OR requested as a custom training at a GTI office location or your location.