UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

NATIONAL VEHICLE AND FUEL EMISSIONS LABORATORY

2565 PLYMOUTH ROAD

ANN ARBOR, MICHIGAN 48105-2498

		                                                                      
            	     

MEMORANDUM

					

SUBJECT:	March 2009 Meeting with Delphi		

FROM:		Brian Nelson	

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

DATE:		September 11, 2009

________________________________________________________________________
______

In March of 2009, we met with technical staff from Delphi to discuss the
A/C technologies which can improve the overall efficiency of A/C
systems, and the relative efficiency improvement that is possible with
each.  In particular, we discussed improved methods of controlling motor
speed – such as pulse width modulated (PWM) control -  which applied
to both the blower and cooling fan motors, could result in a 15%
improvement in system efficiency.

Attendees from Delphi were:

Prasad Kadle

Timothy Craig

Attendees from EPA were:

Ed Nam

Tony Fernandez

Brian Nelson

 

OFFICE OF

AIR AND RADIATION

