UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

NATIONAL VEHICLE AND FUEL EMISSIONS LABORATORY

2000 TRAVERWOOD DRIVE

ANN ARBOR, MI  48105-2498

									     OFFICE OF

									AIR AND RADIATION

12/17/15

MEMORANDUM

SUBJECT: Test Procedure Review with Cummins, Volvo, Navistar, Paccar,
Daimler 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 December 17, 2015 between
representatives of Cummins, Volvo, Navistar, Paccar, Eaton, Allison,
Daimler 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 – Erik Dykes

EPA – Houshun Zhang, James Sanchez

Navistar – Cortney Guzlas, Dave Gardner, Matt Hunkler

PACCAR – Dan Kieffer, Erin Luke, Mark Malowicki

Allison – 

Volvo – Marc Miller, Steve Berry, Yuesheng He

Daimler – Don Keski, David Kayes, Gerald Freitag

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

SwRI testing update – Houshun

Regression model analysis – SwRI looking into why Model 2 (bsfc) and
Model 8 (fuel mass) do not look as good for child ratings on 55 and 65
mph cycles 

Testing – Only N13 child rating testing has not been completed

EMTC update – James

James reported on November EMTC discussions pertaining to cycle average
map

Pre-conditioning was a big focus; drafting language to prescribe test
order to reduce variability

Discussion on fuel calculations from emissions measurements 

Discussion on measurement techniques and variability for potential SwRI
study

Other topics

January version of GEM will incorporate elements to handle cycle average
map, including regression Model 8 (fuel mass)

Number of required data points in SS map not finalized yet

How will NOx measurements during cycle average map be used?

Can we identify various work tasks that still need to be done, and by
when?  For next call, everyone be prepared to discuss open questions
that still need work – All 

For example, after bug fixes and other changes are implemented in GEM,
does any validation testing, regression model analysis, etc. need to be
re-visited?  

Topics for future calls: 

(1/7) SwRI update – Houshun 

(1/7) Open questions/work remaining – All 

