Greenhouse Gas (GHG) Emission Requirements Combination Tractors and Vocational Vehicles Presentation

Greenhouse Gas (GHG) Emission
Requirements
Combination Tractors and Vocational
Vehicles
Industry/EPA/NHTSA Workshop
Washtenaw Community College
November 3, 2011

1

Organization of Topics
Topics

Slide Numbers

Overview

3-6

Standards

7-12

Application for Certification

13-40

Credits

41-49

Reporting

50-54

Additional Information Sources

55-56

Appendix

57-71
2

GHG Overview
•

Begins with 2014 model year and increases in stringency through 2018 model year

•

Breaks diverse truck sector into 3 distinct categories with unique approaches for each
–
–
–

Combination tractors
Heavy-duty pickups and vans
Vocational vehicles (everything else, buses, refuse trucks, concrete mixers, ambulances, etc. )

•

Sets separate standards for engines as well as vehicles ensuring improvements in
both vehicles and engines

•

Sets separate standards for CO2, N2O, CH4 and HFCs
–

NHTSA is setting complementary fuel consumption standards

•

Provides incentives for early introduction of GHG-reducing technologies and advanced
technologies including EVs and Hybrids

•

Provides manufacturer flexibilities including Averaging, Banking and Trading, among
other provisions

3

How Does This Apply to Tractors and Vocational Vehicles?
•

Regulations are located at: 40 CFR Part 1037
–
–
–
–

•

Applicable to 2014 and later model year new heavy-duty vocational vehicle
chassis and combination tractors
–
–
–

•

Specifically regulates emissions of carbon dioxide
Regulates HFC emissions from combination tractors
Compliance date: compliance is optional prior to January 1, 2014

Excluded Vehicles include:
–
–
–
–
–

•

§1037.1 - Applicability
§1037.5 – Excluded vehicles
§1037.150 – Interim provisions (small manufacturers, EVs, early certification, etc)
§1037.801 - Definitions

Vehicles not meeting definition of “motor vehicle” or “heavy-duty vehicle”
Medium-duty passenger vehicles
Vehicles produced before 2014 model year, unless certified under §1037.150
Vehicles subject to light-duty greenhouse gas standards of 40 CFR part 86
Small manufacturers qualifying under Small Business Administration regulations at 13 CFR 121

This Rule Does Not Regulate Trailers
4

Timeline for Compliance
•

Now:
– Approach certification staff with questions about pre-certification testing:
•
•
•

Aerodynamic evaluation
Tire testing
Innovative or advanced technology evaluation

– Conduct testing, such as:
•
•

•

Aerodynamic, tire, “A vs B” vehicle testing, etc
See also GEM model discussion starting in Slide 19

Prior to the beginning of model year (as early as possible):
– Complete application package, including filling out template and submitting additional
support documents
– If all regulatory requirements are satisfied, EPA will issue a certificate of conformity
which allows your vehicle to be entered into US commerce

•

90 days after end of model year:
– Submit report including production volumes by vehicle and subfamily configuration

•

270 days after end of model year:
– Submit final report
5

Certification Process
Pre-Certification
(Recommended)

Aero Testing
Innovative Tech.
Test Procedure
Adv. Technology
Special
Exemptions
(1037.150(h))

Certification
Application

End of Year
Compliance

Define Families
Declare
Subfamilies &
FELs
Projected
Compliance with
Standard
Label
Warranty,
Maintenance

ABT accounting
with actual sales

Post Model Year

Defect Reporting
Recall

Final Compliance
with Standard
Record Keeping

6

GHG STANDARDS

7

Tractor CO2 Standards
§1037.106

•

Each tractor’s standard is based on the GVWR and cab attributes of the tractor
–
Class 7 (26,000-33,000) & Class 8 (>33,000)
–
Low, mid, and high-roof configurations
–
Day and sleeper cabs

•

The CO2 standards become more stringent in 2017 model year based on the required improvements in the HD engines. No
improvements to the tractor would be necessary to meet these standards.

•

You may optionally certify a tractor to the standards and useful life applicable to a higher vehicle service class (such as
heavy heavy-duty instead of medium heavy-duty), provided you do not generate credits with the vehicle. If you include
smaller vehicles in a credit-generating subfamily (with an FEL below the standard), exclude its production volume from the
credit calculation.

8

Vocational Vehicle CO2 Standards
§1037.105

•

Each vehicle’s standard is based on the GVWR of the complete vehicle

•

The CO2 standards become more stringent in 2017 model year based on the required
improvements in the HD engines. No improvements to the tractor would be necessary to
meet these standards.

•

You may optionally certify a vocational vehicle to the standards and useful life applicable
to a higher vehicle service class (such as medium heavy-duty instead of light heavy-duty),
provided you do not generate credits with the vehicle. If you include smaller vehicles in a
credit-generating subfamily (with an FEL below the standard), exclude its production
volume from the credit calculation.

9

HFC (A/C) Standards for Tractors
§1037.115(c)
•

HFC emissions are controlled through a leakage standard and certification is designbased (no system-level testing is required)

•

No averaging, banking, or trading of HFC credits is allowed

•

The leakage of refrigerant from an A/C system may not exceed 1.50 percent per
year
–

For systems with refrigerant capacities less than 734 grams, the leakage may not exceed
11.0 grams per year

•

Additional details on determining the HFC leakage rate of A/C systems is included
on slide 32

•

The air conditioning leakage standard does not apply to vocational vehicles –
§1037.150(d)
10

N2O and CH4 Standards
§1036.108 (a), §1037.106(c)

• Standards for N2O and CH4 apply to heavy-duty engines
• No unique N2O or CH4 emission standards apply to
tractors or vocational vehicles; however, must use a
GHG-certified engine

11

Regulation Structure & Requirements
Subcategory

Family

Subfamily

9 Tractor
Subcategories which
are based on GVWR,
roof height, and cab
(day or sleeper)

Typically one family
per vehicle
subcategory

A subfamily is a group
of vehicle
configurations within a
family that have the
same FEL

3 Vocational Vehicle
Subcategories which
are based on GVWR

The Subcategory
determines the CO2
emission standard

Additional families for
vehicles with
advanced or
innovative
technologies

Certification is based
on the Family
-One certification
application per family
-One certificate of
conformity issued for
each family

The maximum number
of GHG subfamilies are
determined by the span
of whole number
g/ton-mile results for
the family
For instance, if the
range of FELs in a family
is 300 to 310, there
could be up to11
subfamilies (in 1 g/tonmile increments)
Each subfamily has its
own FEL which becomes
the emission standard
for every vehicle in the
subfamily

Vehicle
Configuration
A vehicle configuration is a
set of vehicles with the
same set of component
configurations
An aero configuration
consists of similar body
components with the same
aero bin and a similar CdA
A tire configuration consists
of a single tire model
A weight configuration
consists of the same set of
weight reduction
technologies
An AES configuration
consists of a single
shutdown strategy,
including expiration setting
A VSL configuration
consists of a single VSL
setting, including expiration
and soft top settings
Each configuration listed in
GEM input/output

Vehicle
Each truck
produced is a
vehicle with a
unique VIN
Each vehicle has its
own ECI label
Record keeping is
required for each
vehicle
In-use, Audit
Recall

12

CERTIFICATION

13

Certification Requirements
§1037.201
• Each vehicle family is required to be certified prior to introduction
into US commerce
– A certificate of conformity, or “certificate” is issued as evidence of this

• The certificate is valid from the effective date until the end of the
model year for which it is issued.
– A model year must include January 1 of the calendar year for which the model
year is named and may not begin before January 2 of the previous calendar
year, and it must end by December 31 of the named calendar year – §1037.801

• The certificate must be renewed annually for vehicles you continue
to produce

14

Demonstrating Compliance with CO2
Emission Standards
•

Manufacturers must calculate a projected production-weighted average CO2
performance for each family based on the modeled (GEM) results from at least ten
subfamilies
–

•

Where production means “U.S.-directed production volume for which the manufacturer has
a reasonable assurance that sale was or will be made to ultimate purchasers in the United
States”

The projected production-weighted CO2 average (including credits) must meet
applicable subcategory standard
–

ABT, Early, and Innovative Credits may be averaged within an Averaging Set. The three
averaging sets are:
•
•
•

–
–
–

Light Heavy-Duty Vehicles (Cl. 2b-5)
Medium Heavy-Duty Vehicles (Cl. 6-7)
Heavy Heavy-Duty Vehicles (Cl. 8)

Advanced Technology Credits may cross over averaging sets, but have a restriction in
number of credits that can cross service classes
May carry forward credits for 5 subsequent model years
May carry forward a deficit for 2 subsequent model years (3 model years total)

15

Useful Life Compliance
Deterioration Factors - §1037.241
•

For purposes of certification, the vehicle family is considered in compliance
with the emission standards if all vehicle configurations in that family have
modeled CO2 emission rates at or below the applicable standards. In other
words, zero deterioration is assumed.
–

•

Refer to Slides 19-31 for information on how the “modeled CO2 emission rates” are
developed

If we determine that your emission controls are likely to deteriorate during
the useful life, we may require you to develop and apply deterioration
factors consistent with good engineering judgment.
– For example, you may need to apply a deterioration factor to address
deterioration of battery performance for an electric hybrid vehicle.
– Where the highest useful life emissions occur between the end of useful life and
at the low-hour test point, base deterioration factors for the vehicles on the
difference between (or ratio of) the point at which the highest emissions occur
and the low-hour test point.
16

Certification Process Outline
• Obtain manufacturer code & CDX access (described earlier)
• Pre-application
–
–
–
–

Define vehicle families, subfamilies, and configurations
Conduct aerodynamic evaluation, collect tire data, other testing
Determine other GEM inputs (VSL, AES, weight reduction)
Conduct GEM modeling of your subfamilies

• Application
– Fill out and submit the certification template
– Submit supplemental documents

• Review
– EPA certification staff will review your materials
– We will work with you to resolve any outstanding issues

• Certification
– If all regulatory requirements are satisfied, we will issue a certificate of
conformity, allowing your vehicle family to be introduced into US commerce

 At all steps, we encourage you to work with your EPA certification
representative to avoid surprises or delays in the process

17

Pre-Certification: Selecting Vehicle Families
§1037.230
• Families are defined by:
– Regulatory subcategory
• Weight class
• Vocational or tractor
• Cab configuration (tractors only)

– Advanced technology
– Innovative technology

• Generally, there will be one family per subcategory of
conventional vehicles (i.e. non-advanced or innovative tech)
• Families are identified with a 12-digit name
– Include model year and manufacturer code
– Separate guidance will be issued on naming guidelines
18

Pre-Certification: GEM Inputs
§1037.520
• Subfamily CO2 emission levels will be determined through a model
(GEM) requiring inputs such as:
–
–
–
–

Aerodynamic bin (tractors only)
Tire rolling resistance
Automatic engine shutdown features (AES, class 8 sleeper cabs only)
Vehicle speed limiter features (VSL, tractors only)
• VSL is not a mandated input, and need only be provided if manufacturer includes it.
See Slide 26 for further detail

– Weight reduction technologies (tractors only)

• You will likely need to test your vehicle to determine some of
the inputs. This testing will need to be done in advance
– Aerodynamics
– Tire rolling resistance
19

Pre-Certification: Aerodynamics
§1037.521
• Drag area (CdA) is used for classifying tractors into aerodynamic
bins
–

•

The Cd of the bin is used as the GEM input. For example:

The recommended method for determining CdA is coastdown testing
(§1037.521(b))
–
–

Manufacturers may use alternate methods (CFD, wind-tunnel, etc), however preliminary
approval must be granted by EPA prior to using such methods (§1037.521(c))
If an approved alternative method is used, an adjustment factor (Falt-aero) is applied to
normalize the results to coastdown testing
20

Pre-Certification: Aerodynamics
Alternative Methods
• Basic outline for using alternate aerodynamic evaluation
methods
– Approach your EPA certification representative with your plan for
validating the alternate method, including all the elements listed in
§1037.521(c)(2),(3),&(4)
– Conduct coastdown testing using a Cl-8, high-roof, sleeper cab with full
aerodynamics package, pulling a standard trailer
• Unless we approve otherwise
• If you have multiple vehicles meeting this description, use the one with
highest projected sales

– Conduct testing of the same vehicle using the alternate method
• Calculate the adjustment factor (Falt-aero) using these two tests

– Present the final results to EPA certification staff for approval
– Approval will include the conditions under which this is valid (e.g. wind
tunnel boundary layer treatment, CFD turbulence treatment, etc.)
21

Pre-Certification: Aerodynamics
Example – High-Roof Tractor
•
•
•
•
•
•

A coastdown of high-roof sleeper cab #1 produced a CdA test result of 6.2 m2
The same high roof sleeper cab #1 was tested in a wind tunnel and produced a CdA
test result of 6.3 m2
Falt-aero for this manufacturer’s wind tunnel is equal to 6.2 / 6.3 = 0.984
High roof sleeper cab #2 is tested in the same wind tunnel and produces a CdA of
5.8 m2
The CdA value for #2 is equal to 5.8 * 0.984 = 5.7 m2
Tractor #2 falls into Bin IV and a Cd value of 0.52 is entered into GEM

22

Pre-Certification: Aerodynamics
Provisions for low & mid-roof tractors
•

Manufacturers may use the drag area from a high-roof tractor to certify low
and mid-roof tractors (§1037.520(b)(3))

•

Under this provision, apply the following conversion:
If your high-roof bin is: Your low or mid-roof bin is:
I or II
I
III, IV, or V
II

•

Example:
– Your Cl-8, high-roof day-cab “config. A” was tested and determined to have a
CdA of 6.6 m2
• The appropriate aerodynamic bin is bin III (§1037.520(b)(2)) and therefore has a GEM
Cd input of 0.63

– You wish to certify your Cl-8 low-roof day-cab “conf. Z” using these aerodynamic
results
• Based on §1037.520(b)(3), your aerodynamic is bin II and your GEM Cd input is 0.71
23

Pre-Certification: Tire Testing
§1037.520(c)
• GEM input is equal to the average rolling resistance of 3 tires,
measured once each using ISO 28580 test procedure
• Manufacturers may conduct tire testing or use data from tire
manufacturers
– If results are obtained from a third party, a signed statement
from the third party must be obtained (§1037.520(c)(3))
• Reference testing laboratories:
– Standard Testing Lab (STL), Massillon, OH – www.stllabs.com
– Smithers-Rapra (Smithers), Ravenna, OH – www.smithers.com
24

Pre-Certification: Other GEM Inputs
• Weight reduction 1037.520(e)
– Determine the total weight reduction based on the components
installed in the vehicle as indicated in Table 4 and Table 5 to
§1037.520

25

Pre-Certification: Other GEM Inputs
•

Vehicle Speed Limiter (VSL) §1037.520(d), §1037.640
–
–

–

•

Enter speed limit to nearest 0.1 mph
For systems which are equipped with either an expiring VSL or soft-top, derive input per the following
equation – §1037.640(d)
• Effective speed = ExF * [STF* STSL + (1-STF) * DSL] + (1-ExF)*65 mph
• Where:
– ExF = Expiration factor
– STF = Maximum number of soft-top operation hours/day
– STSL = Soft top speed limit
– DSL = Default speed limit
At the time of certification, please identify the VSL parameters resulting in the highest GEM input, lowest
GEM input, and highest projected sales within a given family

Extended idle reduction (AES) §1037.520(f), §1037.660
–
–
–

–

If equipped with automatic engine shutdown after 5 minutes of idling, use 5 g/ton-mile
Allowable delays and override conditions are listed in §1037.660(a) and (b)
For systems which are equipped with an expiring automatic engine shutdown, derive input per the following
equation, and input the value rounded to one decimal place - 1037.660(c)
• Input = 5 g CO2/ton-mile × (miles at expiration / 1,259,000 miles)
At the time of certification, please identify the AES parameters you intend to use resulting in the highest
GEM input, lowest GEM input, and highest projected sales within a given family

26

GEM Simulation Tool v2.0
• GEM is available at:
– http://www.epa.gov/otaq/climate/gem.htm

• Download the executable version of GEM Setup.exe
– Will create executable file on desktop
– Creates GEM folder which contains:
• GEM User Manual
• Sample GEM input file
• GEM Executable file

• Refer to User Guide for installation and use instructions
• Batch-processing input file (Excel-based) included
27

GEM GUI

•

Select Simulation Type (Single or Multiple Configuration)

•

For Single Configuration Run:
–
–
–
–

Input Identification information
Select one regulatory subcategory
Input Simulation Inputs information
“Run”

28

GEM Input File Example
For running one or more vehicle configurations
Manufacturer Name
Model Year
Vehicle Family Name
Regulatory
Subcategory
Input File Name

Configuration
1
2
3
4
5
6

XXX
2014
XXX
Class 8 Combination - Sleeper Cab High Roof

EPA Defined
User Entered
GEM
Input

GEM_Input

Brand/Model Name

Aerodynamics
CdA
Bin
(Test) Cd (Bin)
II
6.8
0.68
III
6.5
0.60
IV
5.7
0.52
II
7
0.68
III
5.9
0.60
IV
5.6
0.52

Steer
Tires

Drive
Tires

CRR
7.8
7.8
7.8
7.8
7.8
7.8

CRR
8.2
8.2
8.2
7.3
8.2
7.3

Idle
Reduction
0
0
0
0
0
0

Weight
Reduction
0
0
0
0
400
400

VSL
65
65
65
65
65
65

29

GEM Output File Example
Manufacturer
Name
Model Year
Vehicle Family
Name
Regulatory
Subcategory
Date/Time of Run
Input File Name

XXX
2014
XXX
Class 8 Combination Sleeper Cab - High Roof
19-Aug2011/02:58:00pm
N/A

Passed through from
input matrix
GEM Inputs (from input
matrix)
GEM Outputs
User Input following GEM
run

Steer Drive
Aerodynamics Tires Tires
Configuration
1

Brand/Model Name
N/A

Bi CdA Cd
n (Test) (Bin) CRR
III 6.5 0.65 7.8

Results
FEL
Subfamily
g
gal/100
g
CO2/ton- 0 ton- CO2/ton- gal/1000 Subfamily Subfamily Subfamily
Idle
Weight
Name
Volume
FEL
mile
mile
ton-mile
CRR Reduction Reduction VSL mile
8.2
0
0
65 87.09933 8.55592
87
8.6

30

GEM Results Required for Certification
§1037.520
• Run GEM for a minimum of ten vehicle configurations
for each family, including:
– Highest modeling result
– Lowest modeling result
– Highest projected sales

• List an FEL for each potential subfamily within the family
– This will be each whole number gram/ton-mile value between
the lowest and highest modeling result from above

• Please include your GEM input/output file in your
application for certification
31

HFC Emissions
§1037.115(c)
• An excel file is available to calculate percent leakage and leakage
rate of HFC emissions
1. RIGID PIPE CONNECTIONS
3. FLEXIBLE HOSES
Enter the number of each type of fitting
in the
appropriateforcell
below:
Enter
the dimensions
each
hose, by hose type, in the system.
Type of connection
Single O ring:
Single captured O ring:
Multiple O ring:
Seal washer:
Seal washer with O ring:
Metal gasket:

No.

4. HEAT EXCHANGERS, MUFFLERS, RECEIVER/DRIERS, AND ACCUMULATORS
Inner
Emission rate for all devices combined assumed to be 0.5 x 0.522.
Length Diameter
Emission
rate for
all devices (g/year):
0.261
(mm)
(mm)

9
1
All Rubber Hose
High pressure side, hose 1
2 hose 2
High pressure side,
High pressure side, hose 3
5. COMPRESSORS
High pressure side, hose 4
Enter the number of each type of fitting in the appropriate cell below:
Low pressure side, hose 1
650
16
Low pressure 6.368
side, hose 2
Rigid pipe connections emission rate (g/year):
Type of Fitting
No.
Low pressure side, hose 3
O-ring housing seals:
1
Low pressure side, hose 4
Molded housing seals:
1
Standard
barrier
or veneer hose
2. SERVICE PORTS AND REFRIGERANT
CONTROL
DEVICES
1
High
pressure
side,
hose 1
650 plates:
10
Enter the number of each type of port/control
device
in the
appropriate
cell below: Fitting adapter
High pressure side, hose 2
Gasket housing seals:
High pressure
Lips on shaft seal (belt-driven compressors only):
1
Type of connection
No. side, hose 3
High
pressure
side,
High side service ports:
1 hose 4
Low pressure side,1 hose 1
Low side service ports:
Compressor emission rate (g/year):
11.223
Low
pressure side,2 hose 2
Switches, transducers, and pressure relief
valves:
Low pressure side,1 hose 3
Refrigerant control devices:
6. REFRIGERANT CAPACITY FOR SYSTEMS WITH GREATER THAN 733 GRAMS
Low pressure side, hose 4
Enter the system's refrigerant capacity in grams in the appropriate cell below:
Ultra-low
permeation
barrier or veneer hose
Service port/control device emission
rate (g/year):
0.574
High pressure side, hose 1
Refrigerant Capacity (g)
1300
High pressure side, hose 2
High pressure side, hose 3
FOR REFRIGERANT CAPACITY FOR SYSTEMS WITH LESS THAN OR EQUAL TO 733 GRAMS
High pressure side, hose 4
TOTAL SYSTEM REFRIGERANT EMISSION RATE (G/YEAR):
19.2
Low pressure side, hose 1
Low pressure side, hose 2
Low pressure side, hose 3
FOR REFRIGERANT CAPACITY FOR SYSTEMS WITH GREATER THAN 733 GRAMS
Low pressure side, hose 4
TOTAL SYSTEM REFRIGERANT PERCENT LEAKAGE (%/YEAR):
1.5%

32

HD Vehicle GHG Certification Template
•

Excel-based template designed to collect most information required in
§1037.205
–
–
–
–

•

Remainder of information is collected in supplemental documents
–
–
–
–

•

General family information
Advanced/innovative technology basics
HFC information
GEM input/output

ECI Label
Warranty document
Aerodynamics worksheet
Other

All information will be uploaded to EPA’s CDX system

 Demonstration of template

33

Application: Supplemental Documents
Labeling -§1037.135
•

§1037.135 Requires your vehicles to have a permanent emission-control
information label

Provide sample of vehicle label with the following information:
•
•
•
•
•
•
•
•

Heading: “VEHICLE EMISSION CONTROL INFORMATION”
Corporate name and trademark
Vehicle family standardized designation (to be provided in guidance)
Regulatory subcategory
Date of manufacture
Emission Control System (identifiers shown in App III to Part1037)
Fuel and lubricant requirements
Statement “THIS VEHICLE COMPLIES WITH U.S. EPA REGULATIONS FOR [MODEL
YEAR] HEAVY-DUTY VEHICLES”
34

Application: Supplemental Documents
Warranty - §1037.120
•

For purposes of application for certification, include a copy of the warranty statement provided to
consumers

•

The general requirement is that the product is designed and built so it conforms a the time of sale
with GHG requirements

•

Warranty periods, at least:
•
•
•
•

•

Components covered include all components whose failure would increase a vehicle’s GHG
emissions, including:
•
•

•

Spark-ignition vehicles and light heavy-duty vehicles: 5 years or 50,000 miles
Medium and heavy heavy-duty vehicles: 5 years or 100,000 miles
Tires: 2 years or 24,000 miles
Warranty period cannot be shorter than any warranty of a component that you provide without charge

For Tractors: VSL, idle shutdown systems, fairings, hybrid components, tires, air conditioning components,
and other advanced and innovative technology components
For Vocational Vehicles: hybrid components, tires, and other advanced and innovative technology
components

Describe the emission-related warranty provisions in the owners manual

35

Application: Supplemental Documents
Maintenance - §1037.125
•

For purposes of application for certification of conventional vehicles, include a statement that
says you meet the maintenance requirements of this part. For advanced technology vehicles,
provide a copy of maintenance instructions provided to the consumer.

•

Critical emission-related maintenance
–
–

You may schedule critical emission-related maintenance on these components if you demonstrate that the
maintenance is reasonably likely to be done at the recommended intervals on in-use vehicles.
You may recommend any additional amount of maintenance on these components as long as you state
clearly that these maintenance steps are not necessary to keep the emission-related warranty valid.

•

See regulations for other special maintenance, noncritical emission-related maintenance, and
non emission-related maintenance

•

Explain the owner’s responsibility for proper maintenance in the owners manual.
–

•

Include instructions that will enable the owner to replace tires so that the vehicle conforms to the original
certified vehicle configuration.

See §1037.220 for amending maintenance instructions
36

Application: Supplemental Documents
Aerodynamics - §1037.520(b)
Two types of aerodynamic worksheets:
• Alternate aerodynamic method approval
– May be used across several vehicle families
– Describes the alternate method and how testing must be conducted for the
approval to be valid
– Described on “alternative methods” slide

• Aerodynamic testing
–
–
–
–

Test vehicle and test method descriptions
Methodology for aerodynamic configuration grouping
Test results from vehicles within the family
Aerodynamic bin(s) for each configuration

• Currently no standardized template/format for either
– Please consult §1037.520 & §1037.521 for the required content
37

GHG Program Flexibilities
Vocational Tractors – §1037.630:

Off-Road Vehicles – §1037.631:

•Allows manufacturers to reclassify certain tractors
essentially as vocational vehicles, such as:

•Applies to vocational tractors and vocational vehicles
intended for off-road use, such as vehicles that:

•Low roof pickup and delivery
•Off-road operation such as reinforced frames and
increased ground clearance
•GCWR>120,000 pounds

•Must conform to applicable vocational vehicle
requirements instead of tractor requirements
•Provide explanation of why specific tractor qualifies
as a vocational tractor in application
•Report VINs in end of the year report that fall under
this provision
•Special Label required - §1037.630(b)(3)
Restrictions:
•Limited to 21,000 tractors in any three model year
period per manufacturer

•Tires rated at 55 mph or lower
•Designed for low speed operation
•GAWR>29,000 pounds
•Speed attainable in 2 miles of not more than 33 mph
•Speed attainable in 2 miles of 45 mph and an unloaded
vehicle weight not less than 95% of its GVWR, and no
capacity to carry occupants other than driver and crew

•Off-road vehicles do not have any vehicle
requirements
•Provide explanation of why specific tractor qualifies
as a off-road vehicle in application
•Report VINs in end of the year report that fall under
this provision
•Special Label required - §1037.631(d)
•§1037.150(h): In unusual circumstances,
manufacturers may ask us to exempt vehicles under
§1037.631 based on other criteria that are equivalent
to those specified in §1037.631(a). For example, we
would normally not grant relief in cases where the
vehicle manufacturer had credits or other compliant
tires were available.

In either case, work with your certification representative to confirm your vehicle qualifies

Vocational Vehicle Program Flexibility
§1037.150(l)

Optional certification to the standards of §1037.104
• You may certify certain complete or cab-complete vehicles to the
standards of §1037.104 (HD Pickup Truck and Van standards),
such as:
– Complete or cab-complete spark-ignition vehicles
– Cab-complete vehicles based on a complete sister vehicle
– In unusual circumstances Class 2b or 3 incomplete vehicles

Restrictions:
• Does not affect criteria pollutant certification
39

Optional HD Chassis-Certification
Class 4 and Above Vehicles - §1037.150(l)
Sparkignition
Diesel

Classes greater
than Class 3

Loose engines
(for any HD
vehicle class)

E

E

Criteria
GHG
Criteria
GHG

C

E
E

C

E
E

E = engine-certified (g/hp-hr) for criteria pollutants and
treated as a vocational vehicle for GHG with separate
engine certification (g/hp-hr) and vehicle certification
with GEM (g/ton-mile)
C = chassis-certified (g/mile)
C or E = manufacturer can choose between chassiscertification and engine-certification

• Spark Ignition and Diesel vehicles must engine certify for criteria emissions
• Diesel vehicles must:
• Certify as a vocational vehicle for GHG emissions with separate engine
certification and vehicle certification
•Spark ignition vehicles may choose to either:
• Chassis certify for GHG emissions (2014MY and later) –or –
• Certify as a vocational vehicle for GHG emissions with separate engine
certification (2016MY and later) and vehicle certification (2014MY and later)
40

CREDITS

41

Earning CO2 Credits
§1037.705, et al.

Sum of four independent calculations (calculated separately for each
averaging set) = total credits in a model year
1.
2.
3.
4.

Averaging, Banking, and Trading – §1037.705
Early Credits – §1037.150(a)
Innovative Technology Credits – §1037.610
Advanced Technology Credits – §1037.615

Credits are rounded to the nearest whole megagrams (Mg) after the
intermediate calculations

42

Credit Applicability
Subcategory

Averaging Set

Service Class

Standards are based on Subcategory

ABT, Early, and Innovative Credits must stay
within an Averaging Set

Advanced Technology credits may move
among averaging sets, but moves from one
service class to another are restricted to
60,000 Mg per model year

9 Tractor Subcategories
•Cl. 7 Low Roof Day Cab
•Cl. 7 Mid Roof Day Cab
•Cl. 7 High Roof Day Cab
•Cl. 8 Low Roof Day Cab
•Cl. 8 Mid Roof Day Cab
•Cl. 8 High Roof Day Cab
•Cl. 8 Low Roof Sleeper Cab
•Cl. 8 Mid Roof Sleeper Cab
•Cl. 8 High Roof Sleeper Cab

3 Vehicle Averaging Sets
•Light Heavy –Duty Vehicles (Cl. 2b-5)
•Medium Heavy-Duty Vehicles (Cl. 6-7)
•Heavy Heavy-Duty Vehicles (Cl. 8)
4 Engine Averaging Sets
•Light Heavy-Duty CI Engines (Cl. 2b-5)
•Medium Heavy-Duty CI Engines (Cl. 6-7)
•Heavy Heavy-Duty CI Engines(Cl. 8)
•Spark Ignited Engines

3 Service Classes
• SI Engines, Light Heavy –Duty Vehicles
and CI Engines (Cl. 2b-5)
• Medium Heavy-Duty Vehicles and CI
Engines (Cl. 6-7)
• Heavy Heavy-Duty Vehicles and CI
Engines (Cl. 8)

3 Vocational Vehicle Subcategories
•Light Heavy –Duty Vehicles (Cl. 2b-5)
•Medium Heavy-Duty Vehicles (Cl. 6-7)
•Heavy Heavy-Duty Vehicles (Cl. 8)
4 Engine Subcategories
•Light Heavy-Duty CI Engines (Cl. 2b-5)
•Medium Heavy-Duty CI Engines (Cl. 6-7)
•Heavy Heavy-Duty CI Engines(Cl. 8)
•Spark Ignited Engines

43

GHG Credit Programs
Early Credits – §1037.150(a):
•2013 MY only
•AllPre-2014 MYEVs
•1.5x multiplier
•Certify entire regulatory
subcategory
-or•Difference between 2012 MY
and 2013 MY SmartWay
designated high roof sleeper
cab sales
Restrictions:
•Credits stay in averaging set –
§1037.740(a)
•5 year credit life §1037.740(c)
•Only a single 1.5x multiplier
may be used for early credits
which are also eligible for
Advanced Technology Credits §1037.150(i)

Advanced Technology Credits –
§1037.615:
•Vehicles equipped with:
•Hybrid powertrain with
regenerative braking
•Rankine cycle engines
•Electric vehicles
•Fuel cell vehicles
•Only a vehicle OR engine
manufacturer (not both) may
certify and claim credits for an
advanced technology
•1.5x multiplier – 1037.150(i)

Innovative Technology Credits –
§1037.610:
•Vehicle or engine technology
which is not captured on test
(GEM) and not in common use in
2010 MY for heavy-duty vehicles
•Preapproval of test method
required
•No multiplier
Restrictions:
•Credits stay in averaging set –
§1037.740(a)
•5 year credit life – §1037.740(c)

Restrictions:
•Credits can go into any
averaging set, except only 60,000
Mg CO2 credits per model year
can come into a service class
from another service class §1037.740(b)
•5 year credit life – §1037.740(c)
44

Advanced Technology Demonstration
§1037.510, §1037.525, §1037.550, §1066

•

The testing consists of both a conventional vehicle and a hybrid vehicle.
The results from the two vehicles will be used to determine an improvement
factor

•

Advanced technology demonstrations for vehicles with hybrid powertrains
would typically occur through either chassis testing or powerpack testing

•

Chassis testing
– Refer to procedures in §1037.510, including the weighting factors for the duty cycles
– Provisions for vehicles with a power take-off (PTO) are included in §1037.525

•

Powerpack testing
– Refer to procedures in §1037.550
45

Innovative Technology Credits
§1037.610
•

Credits for CO2-reducing technologies where CO2 reduction is not captured in the test
procedures, e.g., off-cycle

•

Subject to EPA & NHTSA approval, technology must:

•

–

Not be in common use with HD vehicles prior to 2010 MY

–

Not be reflected in GEM

–

Be effective for full useful life and deterioration – if any – must be accounted for

Ways to quantify reductions
–

Alternative demonstration (EPA approval required)
• Use chassis testing, modeling, on-road testing/data collection, etc.
• Be robust and verifiable
• Demonstrate baseline and controlled emissions over a wide range of vehicles and driving
conditions, minimizing uncertainty
• May be subject to notice and comment through Federal Register notice
46

Credit Banking
§1037.715
• Credits are earned at the end of the model year and maintained and
reported separately
• Total credits in each category is the sum of:
– Average credits
– Optional credits (Innovative, Advanced Technology, Early)

• Credits may be banked for five years after model year in which they
were earned
– Example: Credits earned in 2014 may be used in any of the 2015
through 2019 model years. Credits remaining unused at end of 2019
will expire.

• Banked credits retain the designation of the averaging set in which
they were generated, unless they are an Advanced Technology
credit
47

Credit Trading
§1037.720

• Credits may be traded to another manufacturer (or any
other party)
– Annual report must provide details of transfers
– Trades must involve credits that are available (either generated
or purchased by the trader) and must not result in a deficit
– Traded credits retain the designation of averaging set in which
they were generated

• Important! If a manufacturer generates credits, they
must use those credits to offset any existing deficit
before considering banking or trading
48

Credit Deficits
§1037.745
• Like positive balances, deficits are determined at the end of the
model year and maintained/reported
• Deficits may be carried forward into the three model years after the
year generated
– Example: A deficit accrued in MY2014 may be carried forward through
MY2017. If not offset by end of MY2017 then penalties may apply.

• May only apply surplus credits to the deficit
• May be carried forward only after all banked credits are used up
• Certificates may be voided ab initio if a deficit is not offset – by
credits generated or purchased – by the required model year
49

REPORTING

50

Compliance Information
• EPA is committed to both protecting CBI and to achieving
transparency in implementation of the GHG program
• EPA currently publishes:
• Compliance Report
• Certification data (certification testing summary)

• EPA does not consider emissions data to be CBI, as such the
GEM outputs will not be treated as CBI
• For GHG, EPA intends to publish as much non-CBI
information for each manufacturer after the end of the model
year as possible

51

End of Year Report
§1037.250
•

The end of year report must be submitted within 90 days after the end of the model year
and include the following information:
–
–
–
–
–
–
–
–
–
–

Manufacturer corporate name and corporate ownership structure
Report production volumes by VIN and vehicle configuration and identify subfamily
Report uncertified vehicles sold to secondary vehicle manufacturers
Manufacturer average CO2 performance by subcategory
All intermediate calculation values
Description of the A/C system, the A/C leakage information (tractors only)
Number of credits or debits
All intermediate credit/debit values
Resultant credit/debit balance
Manufacturers who traded credits must include a copy of the transaction
documentation, including the name of credit provider, the name of credit recipient,
the date of trade, the quantity of megagrams traded, and the model year in which
credits were earned.

52

End of Year Report
Manufacturer Name
Model Year
Vehicle Family
Name

Regulatory
Subcategory

DRAFT

2014

Class 8
Combination Sleeper Cab - High
Roof

Aerodynamics

VIN
XXXXXXXX1
XXXXXXXX2
XXXXXXXX3
XXXXXXXX4
XXXXXXXX5
XXXXXXXX6
XXXXXXXX7
XXXXXXXX8
XXXXXXXX9
XXXXXXXX10
XXXXXXXX11
XXXXXXXX12
XXXXXXXX13
XXXXXXXX14

Brand/Model
Name
XXX
XXX
XXX
XXX
XXX
XXX
XXX
XXX
XXX
XXX
XXX
XXX
XXX
XXX

Bin

CdA
(Test)

Cd
(Bin)

Steer
Tires

Drive
Tires

CRR

CRR

FEL
Subfamily
g
CO2/t
Idle
Weight
on- gal/1000 Subfamily Subfamily Subfamily
Reduction Reduction VSL mile ton-mile
Name
FEL
Volume

53

End of Year Report

DRAFT

Credit Summary

Example End of Year Report - Banking and Trading Credits Summary

Vehicle Subcategory
Cl. 8 High Roof Sleeper Cab
Cl. 8 Mid Roof Sleeper Cab
Cl. 8 High Roof Day Cab

Model Year
2014
2014
2014

Manufacturer
Compliance
Applicable Standard Level (g/tonCredit Early Credits
mile)
(g/ton-mile)
(Deficit) (Mg) (Mg)
75
74
10,000
0
76
76
0
0
92
93
-11,000
0

Innovative
Technology
Credits (Mg)
5,000
8,000
12,000

Credit Balance
Available to
Credit Balance
Advanced
Restricted to Technology Credits Other Averaging
Sets (Mg)
Averaging Set (Mg)
(Mg)
15,000
0
0
8,000
0
0
1,000
10,000
10,000

Date Credits
Were Earned
12/31/2014
12/31/2014
12/31/2014

Comments

54

Certification Contacts for HD engines,
tractors & vocational vehicles
• Justin Greuel – DECC Director (DCO)
– [email protected] – (202) 343-9891

• Greg Orehowsky – Team leader
– [email protected] – (202) 343-9292
– Navistar/International, Fiat Powertrain, Mitsubishi Fuso

• Jason Gumbs – Certification representative
– [email protected] – (202) 343-9271
– Detroit Diesel/Daimler Trucks, Volvo (P/T & trucks)

• Jay Smith – Certification representative
– [email protected] – (734) 214-4302
– PACCAR, Ford, GM, Cummins, Isuzu

 Manufacturers new to certification should contact Greg

55

Future Guidance
• EPA will issue guidance on future subjects
when and if necessary
• Please use the index cards to submit questions
• Contact your certification representative

56

For More Information:
• A copy of this presentation & GHG rulemaking documents will
be available at:
– www.epa.gov/otaq/climate/regulations.htm

• Vehicle certification template will be available at:
– www.epa.gov/otaq/certdat2.htm

• See Federal Register, 76 FR at 57106 (September 15, 2011)
• See Code of Federal Regulations, 40 CFR Part 1037

57

APPENDIX

58

Vehicle Label – Emission Control Information
§1037.135, Appendix III to part 1037
Tractors
•
Vehicle Speed Limiters
–
–
–
–

•

Idle Reduction Technology
–
–

•

LRRA – Low rolling resistance tires (all)
LRRD – Low rolling resistance tires (drive RR<8.2)
LRRS – Low rolling resistance tires (steer RR<7.8)

–
–
–

•

LRRA – Low rolling resistance tires (all)
LRRD – Low rolling resistance tires (drive RR<7.7)
LRRS – Low rolling resistance tires (steer RR<7.7)

Other Components
–
–
–

ADVH – Vehicle includes advanced hybrid
technology components
ADVO – Vehicle includes other advanced
technology components (i.e., non-hybrid system)
INV – Vehicle includes innovative technology
components

Aerodynamic Components
–
–
–
–

•

IRT5 – Engine shutoff after 5 minutes or less of idling
IRTE – Expiring engine shutoff

Tires
–
–
–

•

VSL – Vehicle speed limiter
VSLS – “Soft-top” vehicle speed limiter
VSLE – Expiring vehicle speed limiter
VSLD – Vehicle speed limiter with both “soft-top” and
expiration

Vocational Vehicles
•
Tires

ATS – Aerodynamic side skirt and/or fuel tank fairing
ARF – Aerodynamic roof fairing
ARFR – Adjustable height aerodynamic roof fairing
TGR – Gap reducing fairing (tractor to trailer gap)

Other Components
–
–
–

ADVH – Vehicle includes advanced hybrid technology
components
ADVO – Vehicle includes other advanced technology
components (i.e., non-hybrid system)
INV – Vehicle includes innovative technology
components

59

Small Manufacturer Provisions
§1037.150(c)
• Manufacturers meeting the small business criteria specified in 13
CFR 121.201 for “Heavy Duty Truck Manufacturing” are not subject
to the greenhouse gas standards
– NAICS Code 336120: 1,000 employees

• Qualifying manufacturers must notify the Designated Compliance
Officer each model year before introducing these excluded vehicles
into U.S. commerce. This notification must include a description of
the manufacturer’s qualification as a small business under 13 CFR
121.201
• Excluded vehicles must include a label with the following statement:
“THIS VEHICLE IS EXCLUDED UNDER 40 CFR 1037.150(c).\”
60

Useful Life
§1037.106(e)
• CO2 standards are full useful life standards
– For vehicles at or below 19,500 lbs GVWR:
• 10 years/110,000 miles

– For vehicles above 19,500 and at or below 33,000 lbs GVWR:
• 10 years/185,000 miles

– For vehicles above 33,000 lbs GVWR:
• 10 years/435,000 miles

• Full useful life requirements also apply to air conditioning leakage
program and credit programs
61

Rounding Requirements
§1065.20(e)

• Round values to the number of significant digits
necessary to match the number of decimal places
of the applicable standard
• GEM output in the “FEL” column correctly rounds to
the appropriate significant digits
– Grams CO2/ton-mile are rounded to whole number
– Fuel Consumption in gallons/1000 ton-mile are rounded to
one decimal place

62

In-Use GHG Standards
§1037.105, §1037.150
•

The FEL serves as the emission standard for the vehicle subfamily §1037.105(d)

•

We may measure the drag area of your vehicles after they have been
placed into service. Your vehicle conforms to the regulations of this part
with respect to aerodynamic performance if we measure its drag area to be
at or below the maximum drag area allowed for the bin above the bin to
which that configuration was certified (for example, Bin II if you certified the
vehicle to Bin III), unless we determine that you knowingly produced the
vehicle to have a higher drag area than is allowed for the bin to which it
was certified - §1037.150(k)
63

Penalties & Non-compliance
•

In-use Compliance
–

Where we find higher in-use FELs than the certified level, you must forfeit CO2 emission
credits based on the difference between the in-use FEL and the otherwise applicable FEL. §1037.645
•

•

Calculate the amount of credits to be forfeited using the applicable equation in §1037.705, by substituting the otherwise
applicable FEL for the standard and the in-use FEL for the otherwise applicable FEL

End-of-year CO2 Credit Deficits - §1037.745
–

The certificate for a vehicle family for which you do not have sufficient CO2 credits may be
voided ab initio if you do not remedy the deficit within three model years. We will void the
certificate only with respect to the number of vehicles needed to reach the amount of the net
deficit.

•

Penalties are discussed in preamble at 76 FR 57290, September 15, 2011

•

Certification and enforcement provisions of §1037.750 also apply
–

Must meet in-use standards, keep records, send reports and information, etc.

64

Defeat Devices
• The CAA 203 (Title 42, Chapter 85, Subchapter II, Part A,
Section 7522(a)(3)(B) includes a provision which prohibits
defeat devices
– “…for any person to manufacture or sell, or offer to sell, or install, any part or
component intended for use with, or as part of, any motor vehicle or motor vehicle
engine, where a principal effect of the part or component is to bypass, defeat, or
render inoperative any device or element of design installed on or in a motor vehicle
or motor vehicle engine in compliance with regulations under this subchapter, and
where the person knows or should know that such part or component is being offered
for sale or installed for such use or put to such use; …”

• Preamble reads as follows (76 FR 57267, September 15,
2011):
– “Manufacturers are further required to attest that their AECDs are not “defeatdevices,” which are intentionally targeted at reducing emission control effectiveness."

65

Running Change Requirements
§1037.225
• Must amend an application before:
– Add a vehicle configuration to a vehicle family
– Change a vehicle configuration already included in a vehicle
family in a way that may affect emissions or change
components described in the application
– Modify a FEL for a vehicle family

• Send relevant information to the Designated
Compliance Officer
– If you are unclear if you need to file a running change, consult
your certification representative
66

Warranty, Defect Reports & Recall
CAA section 207(a); 1037.15; 1037.120; 1037.601; 1068.501

•

•

Defect Warranty:
–

Applies to emission-related parts, components, systems, software or elements of design which
must function properly to assure continued compliance with GHG requirements.

–

Applies to emission-related components, systems, software or elements of design used to
obtain credits for advanced technology vehicles, off-cycle technologies and early credits.

Defect Reporting & Voluntary Emission-Related Recall Reporting
Requirements:
–
–

•

Applies to emission-related parts, components, systems, software or elements of design
which must function properly to assure continued compliance with GHG requirements.
Applies to emission-related components, systems, software or elements of design used to
obtain credits for advanced technology vehicles, off-cycle technologies and early credits.

Recall:
–

Applies to emission-related components, systems, software or elements of design which
must function properly to assure compliance with GHG requirements.
67

Credits – ABT Example
Emission credits (Mg) = (Std-FEL) × (Payload tons) × (Volume) × (UL) × (10-6)
Where:
Std = the emission standard associated with the specific tractor regulatory subcategory (g/ton-mile).
FEL = the family emission limit for the vehicle subfamily (g/ton-mile).
Payload tons = the prescribed payload for each class in tons (12.5 tons for Class 7 and 19 tons for Class 8).
Volume = U.S.-directed production volume of the vehicle subfamily.
UL = useful life of the tractor (435,000 miles for Class 8 and 185,000 miles for Class 7).
An example:
The 2014MY Class 8 High Roof Sleeper Cab standard is 75 g/ton-mile. A manufacturer produces 1,000 vehicles in
one subfamily within this subcategory with an average emissions of 74 g/ton-mile (rounded to whole number)
during the 2014 model year. The manufacturer also produces 1,500 vehicles in a second subfamily within this
subcategory with an average emissions of 73 g/ton-mile (rounded to whole number) during the 2014 model year.
Lastly, the manufacturer produces 1,000 vehicles in one subfamily within this subcategory with an average
emissions of 76 g/ton-mile (rounded to whole number) during the 2014 model year.
Subfamily #1 Emission credits = (75 – 74 g/ton-mile) × (19 tons) × (1,000 tractors) × (435,000 miles) × (10-6) = 8,265.0
Mg of credits
Subfamily #2 Emission credits = (75 – 73 g/ton-mile) × (19 tons) × (1,500 tractors) × (435,000 miles) × (10-6) =
24,795.0 Mg of credits
Subfamily #3 Emission credits = (75 – 76 g/ton-mile) × (19 tons) × (1,000 tractors) × (435,000 miles) × (10-6) = 8,265.0 Mg of credits
Total Emission credits = 8,265 + 24,795 – 8,265 Mg = 24,795 Mg

68

Early Credits Example #1
Entire Subcategory
Emission credits (Mg) = (Std-FEL) × (Payload tons) × (Volume) × (UL) × (10-6) × 1.5 multiplier
Where:
Std = the emission standard associated with the specific tractor regulatory subcategory (g/ton-mile).
FEL = the family emission limit for the vehicle subfamily (g/ton-mile).
Payload tons = the prescribed payload for each class in tons (12.5 tons for Class 7 and 19 tons for Class 8).
Volume = U.S.-directed production volume of the vehicle subfamily.
UL = useful life of the tractor (435,000 miles for Class 8 and 185,000 miles for Class 7).
An example:
The 2014MY Class 8 High Roof Sleeper Cab standard is 75 g/ton-mile, which is the standard for 2013MY. A
manufacturer produces 1,000 vehicles in one subfamily within this subcategory with an average emissions of 74
g/ton-mile (rounded to whole number) during the 2014 model year. The manufacturer also produces 1,500
vehicles in a second subfamily within this subcategory with an average emissions of 73 g/ton-mile (rounded to
whole number) during the 2014 model year.
Subfamily #1 Emission credits = (75 – 74 g/ton-mile) × (19 tons) × (1,000 tractors) × (435,000 miles) × (10-6) × 1.5 =
12,397.5 Mg of credits
Subfamily #2 Emission credits = (75 – 73 g/ton-mile) × (19 tons) × (1,500 tractors) × (435,000 miles) × (10-6) × 1.5 =
37,192.5 Mg of credits
Total Emission credits = 12,398 + 37,193 Mg = 45,590 Mg

69

Early Credits Example #2
SmartWay Designated Vehicles
Emission credits (Mg) = (Std-FEL) × (Payload tons) × (Volume) × (UL) × (10-6) × 1.5 multiplier
Where:
Std = the emission standard associated with the specific tractor regulatory subcategory (g/ton-mile).
FEL = the family emission limit for the vehicle subfamily (g/ton-mile).
Payload tons = the prescribed payload for each class in tons (12.5 tons for Class 7 and 19 tons for Class 8).
Volume = U.S.-directed production volume of the vehicle subfamily.
UL = useful life of the tractor (435,000 miles for Class 8 and 185,000 miles for Class 7).
An example:
A manufacturer sells 250 2012MY Class 8 High Roof Sleeper Cabs with a SmartWay designation and sells 550 2013
MY Class 8 High Roof Sleeper Cab with a SmartWay designation. The 2014MY Class 8 High Roof Sleeper Cab
standard is 75 g/ton-mile, which is the standard for 2013MY. The manufacturer selects 300 (=550-250) of the
2013MY tractors and runs them through GEM. Assuming that 150 of the vehicles in one subfamily have an
emissions of 74 g/ton-mile (rounded to whole number) and the other 150 vehicles have an emissions of 73 g/tonmile.
Subfamily #1 Emission credits = (75 – 74 g/ton-mile) × (19 tons) × (150 tractors) × (435,000 miles) × (10-6) × 1.5 =
1,859.625 Mg of credits
Subfamily #2 Emission credits = (75 – 73 g/ton-mile) × (19 tons) × (150 tractors) × (435,000 miles) × (10-6) × 1.5 =
3,719.25 Mg of credits
Total Emission credits = 1,860 + 3,719 Mg = 5,579 Mg

70

Advanced Technology Credit Example
1037.615
Emission credits (Mg) = (g/ton-mile benefit) × (Payload tons) × (Volume) × (UL) × (10-6) × 1.5 multiplier
Where:
g/ton-mile benefit = Improvement Factor × GEM result from vehicle with technology
Where:
Improvement Factor = (Emission Rate without technology - Emission Rate with technology)
/
Emission Rate without technology
Payload tons = the prescribed payload for each class in tons (12.5 tons for Class 7 and 19 tons for Class 8)
Volume = U.S.-directed production volume of the vehicles with the innovative technology in the family
UL = useful life of the tractor (435,000 miles for Class 8 and 185,000 miles for Class 7)
An example:
A manufacturer produces 100 Class 8 high roof day cab tractors with a hybrid powertrain. During the chassis test, the
conventional tractor emits 75 g/ton-mile, while the tractor with the hybrid emits 60 g/ton-mile. The GEM result
from the vehicle with the hybrid is 74 g/ton-mile.
Improvement factor = (75 – 60) / 75 g/ton-mile = 0.20
Advanced Technology Emission credits = (0.20) × (74 g/ton-mile) × (19 tons) × (100 tractors) × (435,000 miles) × (106) × 1.5 = 18,348 Mg of credits

71

Innovative Technology Credit Example
Emission credits (Mg) = (g/ton-mile benefit) × (Payload tons) × (Volume) × (UL) × (10-6)
Where:
g/ton-mile benefit = Improvement Factor × GEM result from vehicle with technology
Where:
Improvement Factor = (Emission Rate without technology - Emission Rate with technology) / Emission Rate
without technology
Std = the emission standard associated with the specific tractor regulatory subcategory (g/ton-mile).
Payload tons = the prescribed payload for each class in tons (12.5 tons for Class 7 and 19 tons for Class 8).
Volume = U.S.-directed production volume of the vehicles with the innovative technology in the family.
UL = useful life of the tractor (435,000 miles for Class 8 and 185,000 miles for Class 7).
An example:
The 2014MY Class 8 High Roof Sleeper Cab standard is 75 g/ton-mile. A manufacturer produces 100 vehicles in one
subfamily within this subcategory with an innovative technology which demonstrates an improvement factor of
0.10 during the 2014 model year. The GEM result for this subfamily is 74 g/ton-mile.
Innovative Technology Emission credits = (0.10) × (74 g/ton-mile) × (19 tons) × (100 tractors) × (435,000 miles) × (106) = 6,116 Mg of credits

72