Document ID: EPA-HQ-OAR-2014-0827-2103
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 November 19, 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.  The draft presentations are
enclosed.

EPA presented results from testing conducted at EPA’s National Vehicle
and Fuel Emissions Laboratory.  The results showed the performance of a
few numerical schemes to interpolate and extrapolate data from the
alternative engine mapping procedure.

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 – Mike Howenstein

Volvo – Tony Greszler, Marc Miller

Daimler – Anirban Sett

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

Cycle average map procedure – All

Reviewed updated draft of 1036.540

Default transmission gear ratios represent two different 6 speed
automatics – question about applicability across all the vehicle
categories; so far N13 testing has not shown issue

EMTC recommending to prescribe test order for more repeatable results 

Procedure currently assumes use of Part 1065 regression analysis
criteria for cycle validation

Frequency of zero/span/check has not been set in procedure yet but
testing has used 40 minutes

How is SEA or confirmatory test run?

Send the latest draft procedure to the group – James 

Engine testing at EPA – James 

Reviewed results from Volvo D13 500 and 400 hp engine tests 

Evaluating various regression models: linear with cross terms, fuel mass
and bsfc, engine speed (N) and torque (T) instead of N/V and cycle work 

Does % error have same meaning whether fuel mass or bsfc?

Share slides presented today – James 

 

Topics for future calls: 

(12/3) Cycle average map procedure (continued) – All 

(12/3) Half-hill cycle results – Erik 

(12/3) SwRI testing update – Houshun 

(TBD) ISB child results on 55/65 cycles – Houshun

(Tentative) PACCAR results on use of fuel mass vs. bsfc in powertrain
map – Costi/Mark