UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

NATIONAL VEHICLE AND FUEL EMISSIONS LABORATORY

2000 TRAVERWOOD DRIVE

ANN ARBOR, MI  48105-2498

									     OFFICE OF

									AIR AND RADIATION

10/1/15

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 October 1, 2015 between
representatives of Cummins, Volvo, 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.  The draft presentations are enclosed.

The discussions included analysis of possible changes to the number of
test points in the fuel map defined in 40 CFR 1036.535.  EPA also
presented some preliminary results from testing conducted at Southwest
Research Institute.  The results showed the performance of a few
numerical schemes to interpolate and extrapolate data from the
alternative engine mapping procedure.

