Hybrid Electric Technology

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Hybrid Electric Technology

• 14 February 2008

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Hybrid Electric Vehicle Experimentation
Assessment (HEVEA)

No industry or SAE standards for measuring fuel
economy of hybrid vehicles in military
environments .
Objectives

• Develop Hybrid Electric Vehicle (HEV) Fuel
  Economy and performance Test Operating Procedures
  (TOP)
• Determine the fuel economy benefits of HEV using
  quantifiable test data
• Develop and validate TARDEC MS models
• Provide a tool to predict hybrid electric drive
  cycle performance and fuel economy
• Programmatic Intent
• Enhance future Tactical Wheeled Vehicles (TWV)
  mobility
• thru experimentation and performance analyses
  using hybrid
• vehicle capabilities.
• Support JLTV Acquisition Strategy with
  sufficient and relevant
• HEV test data and lessons learned

Testing
9 conventional and 7 hybrid electric vehicles are
being tested A. Conventional B. Hybrid
Electric 2 - HMMWVs, 1 HMMWV 2 -2 1/2T LMTVs
1 RSTV 1 - 5T MTV 1 - IMG UV 1 FMTV CVT 1
LM UV 2 HEMTTS 1 AH/SS MSV 1 AM GEN UV 1
BAE FMTV 1 OSHKOSH HEMTT A3
2 Parallel hybrid UVs
Parallel Hybrid MSV
RSTV Series HE
HMMWV Series HE
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HEVEA Initial Assessment

• Most Test Incident Reports (TIRs) are engineering
  issues and can be fixed.
• All hybrid vehicles tested are demonstrators and
  may not be ready for production or military
  application
• Issues such as complexity, reliability,
  maintainability, weight (batteries) need further
  consideration
• Emerging technology issues
• Power Electronics Thermal limitations, Power
  devices still in development
• Battery Management Safety, Control, and
  reliability
• Emerging results from test data analysis show
  approximately a 10 improvement on fuel economy
  over conventional vehicles on flat paved terrain.
• Test Operating Procedure (TOP) for Fuel Economy
  needs to incorporate all technologies (hydraulic,
  CVT, Fuel Cells, Electric).
• Validated MS models serve as tools for
  evaluation of new vehicle concepts and support
  the development of Military drive cycles.

Based on test data and reports to date
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Hybrid Electric Technology

• 14 February 2008