Document ID: EPA-HQ-OAR-2014-0827-2104
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

11/19/15

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 3rd, 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

PACCAR – Dan Kieffer, Erin Luke, Mark Malowicki

Allison – 

Volvo – Tony Greszler, Marc Miller

Daimler – Anirban Sett, David Kayes, Gerald Freitag

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

SwRI testing update – Houshun

See slides sent previously by Houshun 

Analyzing 12 regression models each for bsfc and fuel flow, using
various combinations of N/V, work, T, N for ISB and N13 engines on
parent and child ratings 

Models using N and T terms so far have better correlations than N/V and
cycle work, and fuel flow might be better than bsfc

Most promising regression model will be built into ‘debug version’
of GEM

Half-hill cycle results – Erik 

See slides previously sent by Erik

Evaluated latest road grade profiles from NREL on ISX engine + 10 speed
Eaton FAS transmission running in test cell

New steeper % grades are more realistic, but not the hill shapes –
similar conclusion from Volvo simulations comparing to logged vehicle
data

 

Topics for future calls: 

(12/17) SwRI update – Houshun 

(12/17) EMTC update – James