Document ID: EPA-HQ-OAR-2010-0162-3602
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2011-08-29T04:00Z

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
                NATIONAL VEHICLE AND FUEL EMISSIONS LABORATORY
                             2000 TRAVERWOOD ROAD
                           ANN ARBOR, MI  48105-2498

									          	OFFICE OF
										AIR AND RADIATION

July 21, 2011

MEMORANDUM

SUBJECT:	Meeting with Navistar 

FROM:	Angela Cullen, Mechanical Engineer

TO:		Docket EPA-HQ-OAR-2010-0162

This memorandum documents a meeting held on April 11, 2011 between Navistar and EPA and included the following individuals:

      Navistar: John Zagone, Graham Weller, Phillip Gronberg, Ning Lei, and David Piech
      
      EPA: Byron Bunker, Houshun Zhang, Allen Duncan, Matt Brusster, and Angela Cullen

The discussion focused on technology paths to reduce GHG emissions and fuel consumption from heavy-duty engines, including the following:
   * Turbomachinery, including variable geometry and dual stage with double turbines and compressors
   * Exhaust Gas NOx Reduction system
   * Air management
   * Combustion improvement through calibration, higher injection pressure, and improved aftertreatment control
   * Short term parasitic reductions through low viscosity lubricants and crank shaft seal improvements  
   * Long term improvements through reductions in rotating mass, piston ring/cylinder liner friction, and variable flow pumps

The individuals also discussed the engine development process and the impact of OBD calibration on the timing, which can add 6 to 9 months to the development process.  A typical engine development process can take between 3 and 4.75 years.