Document ID: EPA-HQ-OAR-2014-0827-2097
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2016-10-25T04:00Z

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

NATIONAL VEHICLE AND FUEL EMISSIONS LABORATORY

2000 TRAVERWOOD DRIVE

ANN ARBOR, MI  48105-2498

									     OFFICE OF

									AIR AND RADIATION

8/20/15

MEMORANDUM

SUBJECT: Test Procedure Review with Cummins, Volvo, Navistar, Paccar,
Eaton and Allison

FROM: James Sanchez

TO:  Greenhouse Gas Emissions Standards and Fuel Efficiency Standards
for Medium- and

Heavy-Duty Engines and Vehicles - Phase 2 - Docket EPA-HQ-OAR-2014-0827

This memo documents communication on August 20th, 2015 between
representatives of Cummins, Volvo, Navistar, Paccar, Eaton, Allison, and
EPA to discuss heavy-duty test procedures proposed in the Phase 2
greenhouse gas and fuel efficiency standards for heavy-duty vehicles
notice of proposed rulemaking.

Participants: 

Cummins – Jackie Yeager, Manik Narula

Eaton – 

EPA – Houshun Zhang, James Sanchez

Navistar – David Gardner, Cortney Guzlas, Matt Hunkler

PACCAR – Dan Kieffer, Erin Luke

Allison – Mike Howenstein

Volvo – Tony Greszler, Yuesheng He, Jeff Marley

Discussion and follow-up items (with owner's name in bold): 

Vehicle configs with similar cycle work and N/V – Manik  

Reviewed the slides prepared by Manik (emailed to the group after the
call)

Re-send the EPA spreadsheet with details of the vehicle configurations
used in the simulations – James (DONE, emailed to the group after the
call )

Next step is to see if testing confirms the spread in CO2 for similar
N/V and cycle work values is acceptable 

Engine testing issues – Tony/Yuesheng

Discussed issues trying to run engine speeds and torques generated by
GEM: test cell can’t follow drastic torque changes on ARB cycle; lower
cycle work in test cell; engine speed going below idle because GEM only
moves 1 gear at a time (no skip shifting) 

GEM engine transient response not representative of real engine and
needs improvement 

Use Part 1065 regression criteria for now

Volvo may be ready with some test results to share on next call

Questions on entering powertrain map into GEM – Hunkler

Question on why GEM does not use the specific powertrain you are testing
(to determine N/V and cycle work for entering the powertrain map??) –
Needed a general approach that would cover transmissions GEM can’t
simulate, such as CVT, so using a generic powertrain