Greenhouse Gas Emissions Standards and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles |
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Topics: National Highway Traffic Safety Administration
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Margo Tsirigotis Oge
December 29, 2010
[Federal Register: December 29, 2010 (Volume 75, Number 249)]
[Proposed Rules]
[Page 81952-81957]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr29de10-34]
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ENVIRONMENTAL PROTECTION AGENCY
40 CFR Parts 85, 86, 1036, 1037, 1065, 1066, and 1068
DEPARTMENT OF TRANSPORTATION
National Highway Traffic Safety Administration
49 CFR Parts 523, 534, and 535
[EPA-HQ-OAR-2010-0162; FRL-9219-4; NHTSA 2010-0079]
RIN 2060-AP61; RIN 2127-AK74
Greenhouse Gas Emissions Standards and Fuel Efficiency Standards
for Medium- and Heavy-Duty Engines and Vehicles
AGENCIES: Environmental Protection Agency (EPA) and National Highway
Traffic Safety Administration (NHTSA), Department of Transportation
(DOT).
ACTION: Proposed rules; correction.
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SUMMARY: NHTSA and EPA published in the Federal Register of November
30, 2010, proposed rules to establish a comprehensive Heavy-Duty
National Program that will increase fuel efficiency and reduce
greenhouse gas emissions for on-road heavy-duty vehicles, responding to
the President's directive on May 21, 2010, to take coordinated steps to
produce a new generation of clean vehicles. That document inadvertently
contained some incorrect fuel consumption values in NHTSA-specific
tables in the preamble that resulted from using an incorrect conversion
factor for determining CO2 emissions to equivalent fuel
consumption for gasoline fuel. That document also contained some
rounding errors in NHTSA-specific tables in the preamble. This document
corrects the rounding errors by adopting a uniform rounding approach
for all fuel consumption equivalents for those NHTSA-specific tables
and makes the appropriate corrections to the conversions.
FOR FURTHER INFORMATION CONTACT: Rebecca Yoon, Office of Chief Counsel,
National Highway Traffic Safety Administration, 1200 New Jersey Avenue,
SE., Washington, DC 20590. Telephone: (202) 366-2992.
SUPPLEMENTARY INFORMATION: NHTSA and EPA published in the Federal
Register of November 30, 2010, proposed rules to establish a
comprehensive Heavy-Duty National Program that will increase fuel
efficiency and reduce greenhouse gas emissions for on-road heavy-duty
vehicles, responding to the President's directive on May 21, 2010, to
take coordinated steps to produce a new generation of clean vehicles.
That document inadvertently contained some incorrect fuel consumption
values in NHTSA-specific tables in the preamble that resulted from
using an incorrect conversion factor for determining CO2
emissions to equivalent fuel consumption for gasoline fuel. The correct
values that should have been used in the document are a factor of 1,018
grams of CO2 per gallon of diesel for conversion of diesel
fuel, and a factor of 8,887 grams of CO2 per gallon of
gasoline for gasoline.
That document also contained some rounding errors in NHTSA-specific
tables in the preamble. This document corrects the rounding errors by
adopting a uniform rounding approach for all fuel consumption
equivalents and makes the
[[Page 81953]]
appropriate corrections to the conversions. These changes are made to
several NHTSA-specific tables and in several places in the NHTSA-
specific text of the preamble. The proposed regulatory text for both
NHTSA and EPA is not affected.
In FR Doc. 2010-28120, appearing on page 74152 in the Federal
Register of Tuesday, November 30, 2010, the following corrections are
made:
1. On page 74176, correct Table II-1 and accompanying footnote 39
by revising them to read as follows:
Table II-1--Heavy-Duty Combination Tractor Emissions and Fuel Consumption Standards
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Day cab Sleeper cab
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Class 7 Class 8 Class 8
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2014 Model Year CO2 Grams per Ton-Mile
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Low Roof........................................................ 104 79 65
Mid Roof........................................................ 104 79 70
High Roof....................................................... 118 87 73
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2014-2016 Model Year Gallons of Fuel per 1,000 Ton-Mile \39\
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Low Roof........................................................ 10.2 7.8 6.4
Mid Roof........................................................ 10.2 7.8 6.9
High Roof....................................................... 11.6 8.5 7.2
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2017 Model Year CO2 Grams per Ton-Mile
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Low Roof........................................................ 103 78 64
Mid Roof........................................................ 103 78 69
High Roof....................................................... 116 86 71
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2017 Model Year Gallons of Fuel per 1,000 Ton-Mile
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Low Roof........................................................ 10.1 7.7 6.3
Mid Roof........................................................ 10.1 7.7 6.8
High Roof....................................................... 11.4 8.4 7.0
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2. On page 74194, correct Tables II-7 and II-8 by revising them to
read as follows:
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\39\ Manufacturers may voluntarily opt-in to the NHTSA fuel
consumption program in 2014 or 2015. If a manufacturer opts-in, the
program becomes mandatory. See Section I.B.5 for more information
about NHTSA's voluntary opt-in program for MYs 2014 and 2015.
Table II-2--Coefficients for Proposed HD Pickup and Van Target Standards \74\
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Model year a b c d
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Diesel Vehicles:
2014.................................................... 0.0478 368 0.000470 3.61
2015.................................................... 0.0474 366 0.000466 3.60
2016.................................................... 0.0460 354 0.000452 3.48
2017.................................................... 0.0445 343 0.000437 3.37
2018 and later.......................................... 0.0416 320 0.000409 3.14
Gasoline Vehicles:
2014.................................................... 0.0482 371 0.000542 4.17
2015.................................................... 0.0479 369 0.000539 4.15
2016.................................................... 0.0469 362 0.000528 4.07
2017.................................................... 0.0460 354 0.000518 3.98
2018 and later.......................................... 0.0440 339 0.000495 3.81
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Table II-3--Coefficients Proposed for NHTSA's First Alternative and EPA's Alternative HD Pickup and Van Target
Standards
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Model year a b c d
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Diesel Vehicles:
2014 \a\................................................ 0.0478 368 0.000470 3.61
2015 \a\................................................ 0.0474 366 0.000466 3.60
2016-2018............................................... 0.0440 339 0.000432 3.33
2019 and later.......................................... 0.0416 320 0.000409 3.14
Gasoline Vehicles:
2014 \a\................................................ 0.0482 371 0.000542 4.17
2015 \a\................................................ 0.0479 369 0.000539 4.15
[[Page 81954]]
2016-2018............................................... 0.0456 352 0.000513 3.96
2019 and later.......................................... 0.0440 339 0.000495 3.81
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3. On page 74202, correct Table II-11 by revising it to read as
follows:
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\74\ The NHTSA proposal provides voluntary standards for model
years 2014 and 2015. Target line functions for 2016-2018 are for the
second NHTSA alternative described in Section II.C(d)(ii).
Table II-4--Proposed Vocational Diesel Engine Standards Over the Heavy-Duty FTP Cycle
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Medium
Model year Standard Light heavy- heavy-duty Heavy heavy-
duty diesel diesel duty diesel
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2014-2016................................. CO2 Standard (g/bhp-hr)...... 600 600 567
Voluntary Fuel Consumption 5.89 5.89 5.57
Standard (gallon/100 bhp-hr).
2017 and Later............................ CO2 Standard (g/bhp-hr)...... 576 576 555
Fuel Consumption (gallon/100 5.66 5.66 5.45
bhp-hr).
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4. On page 74202, in the third column, correct the first sentence
of the first complete paragraph by revising it to read as follows:
``The baseline 2010 model year CO2 performance of these
heavy-duty gasoline engines over the Heavy-duty FTP cycle is 660 g
CO2/bhp-hr (7.43 gal/100 bhp-hr) in 2010 based on non-GHG
certification data provided to EPA by the manufacturers.''
5. On page 74202, in the third column, correct the first sentence
of the second complete paragraph by revising it to read as follows:
``NHTSA is proposing a 7.06 gallon/100 bhp-hr standard for fuel
consumption while EPA is proposing a 627 g CO2/bhp-hr
standard tested over the Heavy-duty FTP, effective in the 2016 model
year.''
6. On page 74220, correct Table III-2 by revising it to read as
follows:
Table III-5--Class 7 and 8 Tractor Baseline CO2 Emissions and Fuel Consumption
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Class 7 Class 8
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Day cab Day cab Sleeper cab
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Low/mid roof High roof Low/mid roof High roof Low roof Mid roof High roof
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CO2 (grams CO2/ton-mile)......... 111 130 84 96 76 81 89
Fuel Consumption (gal/1,000 ton- 10.9 12.8 8.3 9.4 7.5 8.0 8.6
mile)...........................
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7. On page 74225, correct Table III-6 by revising it to read as
follows:
Table III-6--Proposed 2014 and 2017 Model Year Tractor Reductions
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Class 7 Class 8
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Day cab Day cab Sleeper cab
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Low/mid roof High roof Low/mid roof High roof Low roof Mid roof High roof
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2014 Model Year
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2014 MY Voluntary Fuel 10.2 11.6 7.8 8.5 6.4 6.9 7.2
Consumption Standard (gallon/
1,000 ton-mile).................
[[Page 81955]]
2014 MY CO2 Standard (grams CO2/ 104 118 79 87 65 70 73
ton-mile).......................
Percent Reduction................ 6% 9% 6% 9% 15% 14% 18%
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2017 Model Year
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2017 MY Fuel Consumption Standard 10.1 11.4 7.7 8.4 6.3 6.8 7.0
(gallon/1,000 ton-mile).........
2017 MY CO2 Standard (grams CO2/ 103 116 78 86 64 69 71
ton-mile).......................
Percent Reduction................ 7% 11% 7% 10% 16% 15% 20%
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8. On page 74244, correct Table III-12 by revising it to read as
follows:
Table III-7--Baseline Vocational Vehicle Performance
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Vocational vehicle
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Light heavy-duty Medium heavy-duty Heavy heavy-duty
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Fuel Consumption Baseline (gallon/1,000 ton-mile)...... 37.5 22.3 11.3
CO2 Baseline (grams CO2/ton-mile)...................... 382 227 115
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9. On page 74245, correct Table III-14 by revising it to read as
follows:
Table III-8--Proposed Vocational Vehicle Standards and Percent Reductions
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Vocational vehicle
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Light heavy-duty Medium heavy-duty Heavy heavy-duty
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2016 MY Fuel Consumption Standard (gallon/1,000 ton- 35.2 20.8 10.7
mile).................................................
2017 MY Fuel Consumption Standard (gallon/1,000 ton- 33.8 20.0 10.5
mile).................................................
2014 MY CO2 Standard (grams CO2/ton-mile).............. 358 212 109
2017 MY CO2 Standard (grams CO2/ton-mile).............. 344 204 107
Percent Reduction from 2010 baseline in 2014 MY........ 6% 7% 5%
Percent Reduction from 2010 baseline in 2017 MY........ 10% 10% 7%
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[[Page 81956]]
10. On page 74245, in the third column, correct the second sentence
of the third paragraph by revising it to read as follows: ``The
agencies are projecting a 100% application rate of this technology
package to the heavy-duty gasoline engines, which results in a
CO2 standard of 627 g/bhp-hr and a fuel consumption standard
of 7.06 gallon/100 bhp-hr.''
11. On page 74440, correct Table 1 by revising it to read as
follows:
Table 1--Equation Coefficients for Vehicle Configuration Target
Standards
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Model year c d
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Alternative 1--Fixed Target Standards
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Compression-Ignition Vehicle Coefficients for Model Years 2016 and Later
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2016 through 2018............................. 0.000432 3.33
2019 and later................................ 0.000409 3.14
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Spark-Ignition Vehicle Coefficients for Model Years 2016 and Later
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2016 through 2018............................. 0.000513 3.96
2019 and later................................ 0.000495 3.81
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Alternative 2--Phased-in Target Standards Compression-Ignition Vehicle
Coefficients for Model Years 2016 and Later
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2016.......................................... 0.000452 3.48
2017.......................................... 0.000437 3.37
2018 and later................................ 0.000409 3.14
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Spark-Ignition Vehicle Coefficients for Model Years 2016 and Later
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2016.......................................... 0.000528 4.07
2017.......................................... 0.000518 3.98
2018 and later................................ 0.000495 3.81
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12. On page 74442, correct Table 2 by revising it to read as
follows:
Table 2--Voluntary Compliance Equation Coefficients for Vehicle Fuel
Consumption Standards
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Model year c d
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Compression-Ignition Vehicle Coefficients for Voluntary Compliance in
Model Years 2013 Through 2015
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2013 and 14................................... 0.000470 3.61
2015.......................................... 0.000466 3.60
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Spark-Ignition Vehicle Coefficients for Voluntary Compliance in Model
Years 2013 Through 2015
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2013 and 14................................... 0.000542 4.17
2015.......................................... 0.000539 4.15
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13. On page 74444, correct Table 4 by revising it to read as
follows:
Table 4--Truck Tractor Fuel Consumption Standards
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Day cab Sleeper cab
Regulatory subcategories --------------------------------------
Class 7 Class 8 Class 8
------------------------------------------------------------------------
Fuel Consumption Standards (gallons per 1000 ton-miles) Effective for
Model Years 2017 and Later
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Low Roof......................... 10.1 7.7 6.3
Mid Roof......................... 10.1 7.7 6.8
High Roof........................ 11.4 8.4 7.0
------------------------------------------------------------------------
Fuel Consumption Standards (gallons per 1000 ton-miles) Effective for
Model Years 2013 to 2016
------------------------------------------------------------------------
Low Roof......................... 10.2 7.8 6.4
Mid Roof......................... 10.2 7.8 6.9
High Roof........................ 11.6 8.5 7.2
------------------------------------------------------------------------
14. On page 74445, correct Table 5 by revising it to read as
follows:
Table 5--Heavy-Duty Engine Standards
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Fuel Consumption Standards (gallons per 100 bhp-hr)
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Regulatory subcategory Light heavy-duty Medium heavy-duty compression-ignition
compression- engine
ignition engine.
Heavy heavy-duty compression-ignition Spark-ignition....
engine engines...........
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Truck Application............... Vocational........ Vocational........ Tractor........... Vocational........ Tractor........... All.
Effective Model Years........... 2017 and later 2016 and later.
Fuel Consumption Standard....... 5.66.............. 5.66.............. 4.78.............. 5.45.............. 4.52.............. 7.06.
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Fuel Consumption Standards for Voluntary Compliance (gallons per 100 bhp-hr)
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Regulatory subcategory Light heavy-duty Medium heavy-duty diesel engine
diesel engine.
Heavy heavy-duty diesel engine Spark-ignition....
engine............
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Truck Application............... Vocational........ Vocational........ Tractor........... Vocational........ Tractor........... All.
Effective Model Years........... 2013 through 2016 2013 through 2015.
[[Page 81957]]
Voluntary Fuel Consumption 5.89.............. 5.89.............. 4.93.............. 5.57.............. 4.67.............. 7.06.
Standard.
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Issued: December 20, 2010.
Joseph S. Carra,
Acting Associate Administrator for Rulemaking, National Highway Traffic
Safety Administration, Department of Transportation.
Issued: December 20, 2010.
Margo Tsirigotis Oge,
Director, Office of Transportation Air Quality, Environmental
Protection Agency.
[FR Doc. 2010-32726 Filed 12-28-10; 8:45 am]
BILLING CODE 4910-59-P