August 30, 2016

MEMORANDUM

SUBJECT:	Engine fuel maps for "Greenhouse gas Emissions Model" (GEM) simulation tool, Version 3.0

FROM:	Houshun Zhang, OTAQ/ASD

TO:	Greenhouse Gas Emissions Standards and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles - Phase 2 - EPA-HQ-OAR-2014-0827

This docket includes all the engine fuel maps used in Phase 2 GEM for the stringency runs.  There are twenty seven engine fuel maps, covering all engine categories and all years from 2018, 2021, 2024 to 2027.  In order to use the maps to run GEM, the user must first convert all of these files into csv format.  
