National Automotive C enter Committed to Excellence Current Trends in Vehicle Driveline Modeling and...

National Automotive Center

Committed to Excellence

Current Trends in Vehicle Driveline Modeling and Simulation

Richard Jacobson

Dan Kedziorek

National Automotive Center

Committed to Excellence

Introduction

• Driveline analysis is an important part of the vehicle design process

• The tool for driveline analysis depends on the application

• Several driveline analysis programs will be discussed with various levels of compelxity

• Make comparisons and help select the right tool

National Automotive Center

Committed to Excellence

Topics

• Description of a Vehicle Driveline

• Reasons for Driveline Simulation

• Descriptions of Selected Simulations

• Conclusions

National Automotive Center

Committed to Excellence

Description of a Vehicle DrivelineADVISOR2002 Driveline Diagram

National Automotive Center

Committed to Excellence

Reasons for Driveline Simulation

• Evaluate Vehicle Performance– Top Speed, Acceleration, Fuel consumption,

Cross-Country Speed (truck/SUV), Shifting, Emissions, Handling, Vibration

• Evaluate Vehicle Mobility– Top Speed, Acceleration, Fuel consumption,

Cross-Country Speed, Shifting, Emissions, Speed on Slopes, Obstacle Crossing

National Automotive Center

Committed to Excellence

Several simulations

• Propulsion System Performance Simulation (TARDEC in-house program)

• System for Computer Aided ANalysis (SCAAN) from Allison Transmission

• ADVISOR2002 National Renewable Energy Lab (NREL)• Ricardo Libraries for MSC Easy5 from RICARDO• GT-SUITE from Gamma Technologies• Powertrain Control Research Laboratory (PRCL)

University of Wisconsin-Madison

National Automotive Center

Committed to Excellence

Propulsion System Performance Simulation

• Developed at TARDEC

• Low Resolution

• Limited performance analysis– Acceleration– slope performance– fuel consumption

National Automotive Center

Committed to Excellence

ADVISOR2002

• High resolution

• Extensive input and output

• Graphical User Interface

• Customizable (built on MatLab)

• Detailed output

National Automotive Center

Committed to Excellence

ADVISOR2002 Example

National Automotive Center

Committed to Excellence

Easy5 Ricardo Libraries

• Many pre-built components

• Graphical User Interface

• Takes some work to learn

• Customizable (can link to MatLab)

• Extensive outputs

National Automotive Center

Committed to Excellence

RICARDO Libraries for Easy5 Example

National Automotive Center

Committed to Excellence

System for Computer Aided ANalysis SCAAN

• A service provided by Allison Transmission

• Low resolution

• Limited Performance Analysis– Acceleration– Slope performance

National Automotive Center

Committed to Excellence

Powertrain Control Research Laboratory

• Custom build simulations

• Has provided driveline simulations to the Army for the following:– HMMWV– M916/M870 – M1A1– M2A2

National Automotive Center

Committed to Excellence

Gamma Technologies GT-SUITE

• High resolution

• Highly detailed engine characteristics

• Graphical User Interface

• Can be coupled with CFD code and SIMULINK

• User code can be incorporated

National Automotive Center

Committed to Excellence

Conclusions

• Different levels of fidelity• Different things simulated• What does it all mean

– There are many different tools– Can help speed development of advanced drivelines

• Future Work – Increase use of Easy5 Ricardo Libraries– Advance the state of driveline simulation at TARDEC