Confidential CR E N A U L T N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E RR E N A U L T N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E R
GT INDIA User Conference , 20201
Rangara jan Sr in ivasan
INTEGRATED CO-SIMULATION TO PREDICT VEHICLE AND POWERTRAIN PERFORMANCE
Powertrain CAE - Systems27 January 2020
R E N A U LT N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E R
Confidential CR E N A U L T N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E R
01 Introduction
02System Integration – Co Simulation03Conclusion04
Contents
Validation of Systems
GT INDIA User Conference , 2020
Confidential CR E N A U L T N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E R
INTRODUCTIONA) Importance of SubsystemB) Importance of Model IntegrationC) Motivation & Challenges
01
GT INDIA User Conference , 2020
Confidential CR E N A U L T N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E R
Importance of Subsystem
Engine
Coolant
Circuit
Electrical System Control Strategy
HVAC
Drive Train
+ Gear Box
Vehicle + Driver
Oil & Friction
Circuit
1- INTRODUCTION
GT INDIA User Conference , 2020
Confidential CR E N A U L T N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E R
1- INTRODUCTION
Energy Use
Advanced Technologies
Vehicle Thermal
Management
Cost
• Safety
• Reliability
• Performance
• Comfort
• Consumer demand
• Regulations
• Energy security
• Environment
• Electric Machines
• Power Electronics Modules
• Battery
• Energy Storage
Model Integration
Trade off Performance
GT INDIA User Conference , 2020
Confidential CR E N A U L T N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E R
1- INTRODUCTION
Energy Management
✓ To recover exhaust energy –T/C ✓ Improve cooling system control
✓ Reduce parasitic power losses✓ Quicker engine warm-up
✓ Enhance fuel economy
Importance
GT INDIA User Conference , 2020
Confidential CR E N A U L T N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E R
Background
Engine
Transmission Controls
HVAC
Brake
detailed physics of system to be
modeled !!
How to integrate them in virtual environment..??
Third party
software
Migration to Virtual
Environment
1- INTRODUCTION
GT INDIA User Conference , 2020
Confidential CR E N A U L T N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E R
Motivation and Challenges
▪ System design optimization and performance enhancement
▪ Modeling using system simulation during upstream development
▪ Advance simulation by co-simulation techniques (Integrated simulation)
➢ System Complexity
➢ Validation
➢ Integration
➢ Countermeasures
➢ Minimal Prototype
➢ Reduced efforts
➢ Reliability
➢ Prediction
Opportunities
Modeling Challenges in Current Scenario Benefits with Simulation
1- INTRODUCTION
GT INDIA User Conference , 2020
Confidential CR E N A U L T N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E R
Outcome
▪ Modelling & Validation of full vehicle model by Co-simulation using GT-SUITE & SIMULINK
▪ Analyzing of each sub-system and its performance improvement with counter measure
SystemBaseline
validation with test data
Integrated Models
[Co-simulation]
Vehicle + Powertrain
validation on test driving
cycle
Countermeasure for
performance improvement
Summary
And Conclusions
1- INTRODUCTION
GT INDIA User Conference , 2020
Confidential CR E N A U L T N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E R
VALIDATION OF SYSTEMS :EXAMPLEA) HVACB) Engine ModelC) Vehicle + TransmissionD) ..E) ….
02
GT INDIA User Conference , 2020
Confidential CR E N A U L T N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E R
HVAC System
Condenser with
Receiver Dryer
Evaporator
Compressor
System
Integration
Inputs
Air From Car
interior
Blower
Car Cabin
High Temperature
& High Pressure
Vapour line
High
Pressure
Liquid Line
Low Pressure &
Low
Temperature
Liquid
Low
Pressure
Vapour Line
TXV
Equivalent simulation model in GT-SUITE
2- VALIDATION OF SYSTEMS
GT INDIA User Conference , 2020
Confidential CR E N A U L T N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E R
Methodology
2- VALIDATION OF SYSTEMS
Tuning Parameters
➢ Multipliers ( Friction, Heat Transfer)
➢ Lumped Mass
➢ Heat transfer coefficients
GT INDIA User Conference , 2020
Confidential CR E N A U L T N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E R
Engine Model - Detail Air Pass
2- VALIDATION OF SYSTEMS
Training Output Parameters
➢ Anchor angle
➢ Burn duration
➢ Wiebe exponent
GT INDIA User Conference , 2020
Confidential CR E N A U L T N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E R
Vehicle & Powertrain model
2- VALIDATION OF SYSTEMS
Output Parameters
➢ Vehicle Velocity
➢ Indicated Torque
➢ Gear Shift & Brake Pedal State
Vehicle Speed (Kmph)
Engine Brake Torque(Nm)
GT INDIA User Conference , 2020
Confidential CR E N A U L T N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E R
System IntegrationA) Co-simulationB) Application
03
GT INDIA User Conference , 2020
Confidential CR E N A U L T N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E R
Full Vehicle model layout
3- SYSTEM INTEGRATION – [CO-SIMULATION]
Virtual Environment
GT INDIA User Conference , 2020
Confidential CR E N A U L T N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E R
Vehicle Performance – Fuel Economy
3- SYSTEM INTEGRATION – APPLICATION
System and Impact
Engine Performance
• Combustion
• Friction Load
• Fuel consumption
Engine Thermal
Management
• Coolant Temperature
• Oil Temperature
• Transmission Oil Temperature
Air Conditioning
• Cabin Temperature
• Compressor Torque
• Condenser air outlet temp.
Vehicle Cooling
• Bypass activation
• EGR activation
• Warmup fuel flow
Aerokit+
Tires
• Drag Force
• Rolling resistance
Transmission Model
• Gear Shift Position
• Engine Speed
• Transmission friction torque
Auxiliaries
• Electrical/ Mechanical Power demand
• ON/OFF strategy
Controllers
• Fuel Cut, AC Cut
• Speed Control
• Activation Control
Air Filling
• Volumetric efficiency
• Combustion
• Booster Vacuum
Vehicle Dynamics
• Stability
• Acceleration
• Cornering, Tip in & Tip out
GT INDIA User Conference , 2020
Confidential CR E N A U L T N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E R
HVAC Performance – Cabin Temperature
▪ Better cabin cooling temperature was observed using Variable
Displacement Compressor
▪ VDC displacement is a function of Suction pressure & Evaporator
air outlet temperature
▪ Engine Indicated Torque for VDC is Lesser than FDC due to less
compressor torque demand by VDC by changing compressor
displacement.
Cabin Temperature Improvement
3- SYSTEM INTEGRATION – APPLICATION
GT INDIA User Conference , 2020
Confidential CR E N A U L T N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E R
CONCLUSIONA) Benefits : Accuracy & Lead time Reduction B) Continual Improvement
04
GT INDIA User Conference , 2020
Confidential CR E N A U L T N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E R
Benefits
Accuracy and Lead time reduction
✓ Good Accuracy – Prediction of Vehicle and Powertrain performance by integrating all sub-systems
with complex control system and its interface variable.
✓ Cost Avoidance – Eliminate the model duplication and reduce prototype testing.
✓ Time Reduction – Plug-in concept technique (Data base from MBSE Models).
✓ Quick Adaptive - New innovative ideas using virtual simulation and its impact ( Proof of Concept).
4 – CONCLUSION - Benefits
GT INDIA User Conference , 2020
Confidential CR E N A U L T N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E R
Continual Improvements
Digital Validation [ Less Lead time & More Confidence Level ]
▪ Integration of models is complex and challenging – Software Compatibility.
▪ Standard Process in place to provide fast accurate results.
▪ MBSE challenges – Collaboration with Suppliers and Software developers.
▪ New simulation methods is part of process – Techno Brick.
▪ Co-simulation In Place – Interaction with Multiple software’s for better prediction and lead time reduction.
4 – CONCLUSION – Continual Improvements
GT INDIA User Conference , 2020
Confidential CR E N A U L T N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E R
1.Francois Gougeon, VP – Powertrain Engineering, RNTBCI, Chennai, India .
2.Anand Gurupatham, DGM – Powertrain CAE, RNTBCI, Chennai, India.
3.P.Dimitrakopoulos - Gamma Technologies, USA
Acknowledgements
GT INDIA User Conference , 2020
Confidential CR E N A U L T N I S S A N T E C H N O L O G Y & B U S I N E S S C E N T E R
Thank You
GT INDIA User Conference , 2020
Top Related