Wltp test procedures for hybrid electric vehicle testing
Download
1 / 8

WLTP Test Procedures for Hybrid Electric Vehicle Testing - PowerPoint PPT Presentation


  • 1307 Views
  • Uploaded on

WLTP Test Procedures for Hybrid Electric Vehicle Testing. Chris Nevers - U.S. EPA April 14, 2010. WLTP-DTP-01-12. Outline. Overview of current US domestic test Overview of test procedure opportunities Keys to hybrid electric testing. Current Test Procedures.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'WLTP Test Procedures for Hybrid Electric Vehicle Testing' - Sharon_Dale


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Wltp test procedures for hybrid electric vehicle testing l.jpg

WLTP Test Procedures for Hybrid Electric Vehicle Testing

Chris Nevers - U.S. EPA

April 14, 2010

WLTP-DTP-01-12


Outline l.jpg
Outline

  • Overview of current US domestic test

  • Overview of test procedure opportunities

  • Keys to hybrid electric testing

WLTP-DTP-01-12


Current test procedures l.jpg
Current Test Procedures

  • The United States currently regulates passenger cars utilizing 40 CFR Part 86.

  • For Light Duty Hybrid Electric Vehicles, part 86 references California Exhaust Standards and Test Procedures for 2003 and Subsequent Model Zero-Emission Vehicles and 2001 and Subsequent Model Hybrid Electric Vehicles

  • Room for improvement in end of test criteria, retest criteria/ testing variability, complexity reduction

WLTP-DTP-01-12


Current hev procedures l.jpg
Current HEV Procedures

  • Sampling/ data collection additions to conventional vehicle

    • Integrated Amp-hours (State of Charge)

    • Full double UDDS (4 bag FTP), no stabilized substitution

    • Evaporative worse case emissions still requires 3 bag FTP

  • Unique Procedures

    • Dynamometer Road Load Derivation (regenerative braking disabled)

    • Regenerative braking differences (on road versus dynamometer)

    • Canister load for non-integrated canisters

WLTP-DTP-01-12


Current phev procedures l.jpg
Current PHEV Procedures

  • Sampling/ data collection additions to conventional HEV vehicle

    • Recharge Amp hours

  • Unique Procedures (add. to conv. HEV)

    • Testing throughout entire charge deplete range

    • Charge deplete end of test criteria

WLTP-DTP-01-12


Procedure opportunities l.jpg
Procedure Opportunities

  • End of Test Criteria (PHEV/ HEV)

    • Allow maximum effort for driver trace without terminating test

    • Charge sustain operation could be ended before CS SOC is reached

  • Retest Criteria (PHEV/ HEV)

    • State of Charge correction factor

    • Energy Analysis, similar to Test Cycle Power Calculator

  • All Electric Testing (EV/ PHEV)

    • Allow substitution for multiple vehicle applications of same battery using different vehicle loads

WLTP-DTP-01-12


Procedure concerns l.jpg
Procedure Concerns

  • Double Cold Jeopardy (PHEV)

  • Test on 4wd dynamometers where applicable (all regen)

  • Coast down Techniques without true mechanical neutral ( On-Road)

  • Test Vehicle miles

  • System Durability beyond criteria pollutant impact

WLTP-DTP-01-12


Keys to hev test procedures l.jpg
Keys to HEV Test Procedures

  • Provide building blocks for array of possible CO2, criteria pollutant, and alternative fuel programs beyond worse case emissions

    • Electric range/ usage

    • CO2 displacement

    • “zero emission” programs

    • Alternative fuel programs

  • Level Playing Field

    • Test procedures that are unique to HEV are needed to quantify HEV operation and are not designed to benefit one technology over another

WLTP-DTP-01-12


ad