UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

NATIONAL VEHICLE AND FUEL EMISSIONS LABORATORY

2000 TRAVERWOOD DRIVE

ANN ARBOR, MI  48105-2498

									     OFFICE OF

									AIR AND RADIATION

11/13/13

MEMORANDUM

SUBJECT: Four Wheel Drive Dynamometer Meeting with the Alliance of
Automobile Manufacturers and the Global Automakers

FROM: Christopher Laroo

TO:  EPA Docket # EPA-HQ-OAR-2009-0472

This memo documents a meeting held on 6/13/13 between representatives of
the Alliance of Automobile Manufacturers, Global Automakers, ARB, and
EPA to discuss the results of a test program to look at the effects of
testing vehicles on four wheel drive dynamometers.

Two presentations discussing the test program results are enclosed.  The
results from the test program are inconclusive and indicate that there
may be an unintended effect on fuel economy that could be attributed to
the use of a four wheel drive dynamometer.

The discussion concluded that more testing and data are needed before
requirements be made regarding four wheel drive dynamometer testing.

