UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

NATIONAL VEHICLE AND FUEL EMISSIONS LABORATORY

2565 PLYMOUTH ROAD

ANN ARBOR, MICHIGAN 48105-2498

OFFICE OF

AIR AND RADIATION

                                                                        
          	     

MEMORANDUM

SUBJECT:	Heavy-Duty Hybrid Onboard Diagnostics

FROM:		Amy Kopin

TO:		The Docket

DATE:		July 19, 2011

	

	On May 17th, 2011 we held a conference call with Allison to discuss
concerns raised by Allison regarding heavy-duty onboard diagnostic (OBD)
requirements and timing. Concerns were raised during the comment period
for the heavy-duty greenhouse gas notice of proposed rulemaking that
heavy-duty hybrid applications may not be able to meet the 2013
heavy-duty OBD regulations that were published in the 2009 OBD Final
Rulemaking.,  Specifically, they have requested a delay of the
application of HD OBD requirements for hybrid applications until 2020. 
Attendees from the EPA and Allison are shown in the table below.  The
agenda is on the following page of this memo.

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

NATIONAL VEHICLE AND FUEL EMISSIONS LABORATORY

2565 PLYMOUTH ROAD

ANN ARBOR, MICHIGAN 48105-2498

OFFICE OF

AIR AND RADIATION

                                                                        
         	     

EPA-Allison Heavy-Duty Hybrid OBD Discussion

3-4pm EST  	Tuesday, May 17, 2011

Agenda

What is your current OBD J1939 capability for handling faults?

If you don’t have any, how long do you estimate it will take to make
your current controller’s software J1939 capable?

Comprehensive Components:

What is your understanding of what you need to do for comprehensive
components? 

Why do you think your current diagnostics won’t meet comprehensive
components?

Given that the hybrid system is only covered under comprehensive
components, how long will it take for your company to make your current
diagnostics J1939 compatible for fault storage and reporting?

Do you have the ability to determine an open, shorted to voltage,
shorted to ground, an irrational sensor, and a nonfunctioning output
component for your hybrid electronical components?

Are there specific requirements or regulations that you anticipate
having problems with and can you identify them?

EPA Heavy-Duty OBD Rulemaking and Alternative Fuels Timing

Next Steps

 U.S. EPA, NHTSA, and DOT, “Greenhouse Gas Emission Standards and Fuel
Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles,”
republished December 29, 2010.  Available here: 
http://origin.www.gpo.gov/fdsys/pkg/FR-2010-12-29/html/2010-32726.htm

 U.S. EPA, “Control of Air Pollution from New Motor Vehicles and New
Motor Vehicles Engines; Final Rule Regulations Requiring Onboard
Diagnostic Systems on 2010 and Later Heavy-Duty Engines Used in Highway
Applications Over 14,000 Pounds; Revisions to Onboard Diagnostic
Requirements for Diesel Highway Heavy-Duty Vehicles Under 14,000
Pounds,” published February 24, 2009.  Available here:
http://www.epa.gov/otaq/regs/im/obd/regtech/hd-obd-frm-02-24-09-notice-7
4-fr-8310.pdf

