UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

NATIONAL VEHICLE AND FUEL EMISSIONS LABORATORY

2000 TRAVERWOOD DRIVE

ANN ARBOR, MI  48105-2498

									     OFFICE OF

									AIR AND RADIATION

8/7/15

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 7th, 2015 between
representatives of Cummins, 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 – Erik Dykes

EPA – Houshun Zhang

Navistar – David Gardner, Cortney Guzlas

PACCAR – Dan Kieffer

Allison – Jeff Shultz, Laverne Spears

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

“Hybrid” concept of alt map + ss map 

EPA’s objective with combining the two mapping approaches is to
decrease test burden.

Discussed whether vocational would need more steady state points than
tractor.  Testing of ISB+Allison TX, gasoline engine may answer.

Discussed whether number of cycle average points could be reduced. 
Risk of reducing interpolation accuracy.  Also being looked at by SwRI.


Industry group comments

Might depend on where EMA ends up

Invite Volvo and Daimler to join these calls – Jackie 

EMA questions on cycle average map

How to define generic vehicle configurations – any need to normalize
cycle work as has been done in engine speed space?

Can two different vehicle configs give same cycle work and N/V but
different CO2?  

Look in existing simulations from James – Manik 

Any insight from testing (past or planned)? 

Other

Next GEM release will be around August 18

Road grade changes – intent is to keep cycle time the same 

