UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

NATIONAL VEHICLE AND FUEL EMISSIONS LABORATORY

2000 TRAVERWOOD DRIVE

ANN ARBOR, MI  48105-2498

									     OFFICE OF

									AIR AND RADIATION

4/28/16

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 April 28, 2016 between
representatives of Cummins, Volvo, Navistar, Paccar, Eaton, Allison,
Daimler, Caterpillar, Hino, EMA 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: 

Allison – Jeff Schultz

Caterpillar – 

Cummins – Manik Narula, Jackie Yeager

Daimler – David Kayes, Inderpal Singh

Eaton –

EMA – Tim Blubaugh

EPA – Houshun Zhang, Matt Spears

Hino – Mark Siddall

Navistar – Dave Gardner, Cortney Guzlas, Matt Hunkler

PACCAR – Mark Malowicki, Dan Kieffer

Volvo – 

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

Proposed agenda:

ISB and N13 testing at SwRI – Houshun 

EPA presented cycle average map test results for parent and child
ratings of ISB and N13 engines – see slides emailed previously

Some impractical vehicle configs included in the N13 points; otherwise
saw good accuracy on ARB transient and reasonable results on 55/65
cruise cycles

ISX test results – Manik 

Cummins presented cycle average map test results for ISX parent and
child ratings – see slides emailed previously

Cycle average map works well for both parent and child ratings on 55,
65, and ARB cycles 

Generic vehicle definitions

PACCAR has vocational vehicles that are outside the map bounds and
require extrapolation in N/V and work

Possible ideas for revising definitions to improve map coverage of N/V:

Use different axle ratios on 55 mph and ARB transient than 65 mph

GEM algorithm that determines N/V spread based on engine torque curve

Allow manufacturers to add their own generic vehicles

Allow adjustment of N/V or axle ratio within certain bounds

Provide feedback on the ideas above – All 

Cycle average map option – Matt S. 

EPA is considering allowing an option to certify a cycle average map for
55/65 mph cruise cycles rather than a steady state map

For engine map SEAs, whichever type of map was certified would be the
type audited  

For confirmatory tests, even if the manufacturer certified with a cycle
average map, EPA reserves the right to run a steady state map 

Continue discussion next week – All 

Topics for future calls: 

(TBD) SwRI results (gasoline engine) – Houshun

(5/5) Generic vehicle definition – All 

(5/5) Cycle average map option – All

