[Code of Federal Regulations]
[Title 40, Volume 17]
[Revised as of July 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR86.098-10]
[Page 372-375]
TITLE 40--PROTECTION OF ENVIRONMENT
CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
PART 86_CONTROL OF EMISSIONS FROM NEW AND IN-USE HIGHWAY VEHICLES AND
ENGINES--Table of Contents
Subpart A_General Provisions for Emission Regulations for 1977 and Later
Sec. 86.098-10 Emission standards for 1998 and later model year
Otto-cycle heavy-duty engines and vehicles.
Section 86.098-10 includes text that specifies requirements that
differ from Sec. 86.096-10. Where a paragraph in Sec. 86.096-10 is
identical and applicable to Sec. 86.098-10, this may be indicated by
specifying the corresponding paragraph and the statement ``[Reserved].
For guidance see Sec. 86.096-10.''
(a)(1) Except as provided for 2003 and 2004 model years in
Sec. Sec. 86.005-10(f) and 86.1816-05, exhaust emissions from new 1998
and later model year Otto-cycle heavy-duty engines shall not exceed:
(i) For Otto-cycle heavy-duty engines fueled with either gasoline or
liquefied petroleum gas, and intended for use in all vehicles except as
provided in paragraph (a)(3) of this paragraph.
(A) Hydrocarbons. 1.1 grams per brake horsepower-hour (0.41 gram per
megajoule), as measured under transient operating conditions.
(B) Carbon monoxide. (1) 14.4 grams per brake horsepower-hour (5.36
grams per megajoule), as measured under transient operating conditions.
[[Page 373]]
(2) For Otto-cycle heavy-duty engines fueled with either gasoline or
liquefied petroleum gas and utilizing aftertreatment technology: 0.50
percent of exhaust gas flow at curb idle.
(C) Oxides of nitrogen (1) 4.0 grams per brake horsepower-hour (1.49
grams per megajoule), as measured under transient operating conditions.
(2) A manufacturer may elect to include any or all of its gasoline-
fueled Otto-cycle HDE families in any or all of the NOX or
NOX plus NMHC ABT programs for HDEs, within the restrictions
described in Sec. 86.098-15 as applicable. If the manufacturer elects
to include engine families in any of these programs, the NOX
FELs may not exceed 5.0 grams per brake horsepower-hour (1.9 grams per
megajoule). This ceiling value applies whether credits for the family
are derived from averaging, trading or banking programs.
(3) A manufacturer may elect to include any or all of its liquified
petroleum gas-fueled Otto-cycle HDE families in any or all of the
NOX or NOX plus NMHC ABT programs for HDEs, within
the restrictions described in Sec. 86.098-15 as applicable. If the
manufacturer elects to include engine families in any of these programs,
the NOX FELs may not exceed 5.0 grams per brake horsepower-
hour (1.9 grams per megajoule). This ceiling value applies whether
credits for the family are derived from averaging, trading or banking
programs.
(ii) For Otto-cycle heavy-duty engines fueled with either gasoline
or liquefied petroleum gas, and intended for use only in vehicles with a
Gross Vehicle Weight Rating of greater than 14,000 pounds.
(A) Hydrocarbons. 1.9 grams per brake horsepower-hour (0.71 gram per
megajoule), as measured under transient operating conditions.
(B) Carbon Monoxide. (1) 37.1 grams per brake horsepower-hour (13.8
grams per megajoule), as measured under transient operating conditions.
(2) For Otto-cycle heavy-duty engines fueled with either gasoline or
liquefied petroleum gas and utilizing aftertreatment technology: 0.50
percent of exhaust gas flow at curb idle.
(C) Oxides of nitrogen (1) 4.0 grams per brake horsepower-hour (1.49
grams per megajoule), as measured under transient operating conditions.
(2) A manufacturer may elect to include any or all of its gasoline-
fueled Otto-cycle HDE families in any or all of the NOX or
NOX plus NMHC ABT programs for HDEs, within the restrictions
described in Sec. 86.098-15 as applicable. If the manufacturer elects
to include engine families in any of these programs, the NOX
FELs may not exceed 5.0 grams per brake horsepower-hour (1.9 grams per
megajoule). This ceiling value applies whether credits for the family
are derived from averaging, trading or banking programs.
(3) A manufacturer may elect to include any or all of its liquified
petroleum gas-fueled Otto-cycle HDE families in any or all of the
NOX or NOX plus NMHC ABT programs for HDEs, within
the restrictions described in Sec. 86.098-15 as applicable. If the
manufacturer elects to include engine families in any of these programs,
the NOX FELs may not exceed 5.0 grams per brake horsepower-
hour (1.9 grams per megajoule). This ceiling value applies whether
credits for the family are derived from averaging, trading or banking
programs.
(iii) For methanol-fueled Otto cycle heavy-duty engines intended for
use in all vehicles, except as provided in paragraph (a)(3) of this
section.
(A) Total Hydrocarbon Equivalent. 1.1 gram per brake horsepower-hour
(0.41 gram per megajoule), as measured under transient operating
conditions.
(B) Carbon monoxide. (1) 14.4 grams per brake horsepower-hour (5.36
grams per megajoule), as measured under transient operating conditions.
(2) 0.50 percent of exhaust gas flow at curb idle.
(C) Oxides of nitrogen. (1) 4.0 grams per brake horsepower-hour
(1.49 grams per megajoule), as measured under transient operating
conditions.
(2) A manufacturer may elect to include any or all of its methanol-
fueled Otto-cycle HDE families in any or all of the NOX or
NOX plus NMHC ABT programs for HDEs, within the restrictions
described in Sec. 86.098-15 as applicable. If the manufacturer elects
to include engine families in any of these programs, the NOX
FELs may not exceed 5.0 grams per brake horsepower-
[[Page 374]]
hour (1.9 grams per megajoule). This ceiling value applies whether
credits for the family are derived from averaging, trading or banking
programs.
(iv) For methanol-fueled Otto-cycle heavy-duty engines intended for
use only in vehicles with a Gross Vehicle Weight Rating of greater than
14,000 lbs.
(A) Total Hydrocarbon Equivalent. 1.9 grams per brake horsepower-
hour (0.71 gram per megajoule), as measured under transient operating
conditions.
(B) Carbon monoxide. (1) 37.1 grams per brake horsepower-hour (13.8
grams per megajoule), as measured under transient operating conditions.
(2) 0.50 percent of exhaust gas flow at curb idle.
(C) Oxides of nitrogen. (1) 4.0 grams per brake horsepower-hour
(1.49 grams per megajoule), as measured under transient operating
conditions.
(2) A manufacturer may elect to include any or all of its methanol-
fueled Otto-cycle HDE families in any or all of the NOX or
NOX plus NMHC ABT programs for HDEs, within the restrictions
described in Sec. 86.098-15 as applicable. If the manufacturer elects
to include engine families in any of these programs, the NOX
FELs may not exceed 5.0 grams per brake horsepower-hour (1.9 grams per
megajoule). This ceiling value applies whether credits for the family
are derived from averaging, trading or banking programs.
(v) For natural gas-fueled Otto-cycle heavy-duty engines intended
for use in all vehicles except as provided in paragraph (a)(3) of this
section.
(A) Nonmethane hydrocarbons. 0.9 gram per brake horsepower-hour
(0.33 gram per megajoule), as measured under transient operating
conditions.
(B) Carbon monoxide. (1) 14.4 grams per brake horsepower-hour (5.36
grams per megajoule), as measured under transient operating conditions.
(2) For natural gas-fueled Otto-cycle heavy-duty engines utilizing
aftertreatment technology. 0.50 percent of exhaust flow at curb idle.
(C) Oxides of nitrogen. (1) 5.0 grams per brake horsepower-hour (1.9
grams per megajoule), as measured under transient operating conditions.
(2) A manufacturer may elect to include any or all of its natural
gas-fueled Otto-cycle HDE families in any or all of the NOX
or NOX plus NMHC ABT programs for HDEs, within the
restrictions described in Sec. 86.098-15 as applicable. If the
manufacturer elects to include engine families in any of these programs,
the NOX FELs may not exceed 5.0 grams per brake horsepower-
hour (1.9 grams per megajoule). This ceiling value applies whether
credits for the family are derived from averaging, trading or banking
programs.
(vi) For natural gas-fueled Otto-cycle engines intended for use only
in vehicles with a Gross Vehicle Weight Rating of greater than 14,000
pounds.
(A) Nonmethane hydrocarbons. 1.7 grams per brake horsepower-hour
(0.63 gram per megajoule), as measured under transient operating
conditions.
(B) Carbon monoxide. (1) 37.1 grams per brake horsepower-hour (13.8
grams per megajoule), as measured under transient operating conditions.
(2) For natural gas-fueled Otto-cycle heavy-duty engines utilizing
after treatment technology. 0.50 percent of exhaust gas flow at curb
idle.
(C) Oxides of nitrogen. (1) 5.0 grams per brake horsepower-hour (1.9
grams per megajoule), as measured under transient operating conditions.
(2) A manufacturer may elect to include any or all of its natural
gas-fueled Otto-cycle HDE families in any or all of the NOX
or NOX plus NMHC ABT programs for HDEs, within the
restrictions described in Sec. 86.098-15 as applicable. If the
manufacturer elects to include engine families in any of these programs,
the NOX FELs may not exceed 5.0 grams per brake horsepower-
hour (1.9 grams per megajoule). This ceiling value applies whether
credits for the family are derived from averaging, trading or banking
programs.
(2) The standards set forth in paragraph (a)(1) of this section
refer to the exhaust emitted over the operating schedule set forth in
paragraph (f)(1) of appendix I to this part, and measured and calculated
in accordance with the procedures set forth in subpart N or P of this
part.
(3)(i) A manufacturer may certify one or more Otto-cycle heavy-duty
engine configurations intended for use in all vehicles to the emission
standards set forth in paragraphs (a)(1)(ii), (a)(1)(iv)
[[Page 375]]
or (a)(1)(vi) of this paragraph: Provided, that the total model year
sales of such configuration(s), segregated by fuel type, being certified
to the emission standards in paragraph (a)(1)(ii) of this section
represent no more than five percent of total model year sales of each
fuel type Otto-cycle heavy-duty engine intended for use in vehicles with
a Gross Vehicle Weight Rating of up to 14,000 pounds by the
manufacturer.
(ii) The configurations certified to the emission standards of
paragraphs (a)(1) (ii) and (vi) of this section under the provisions of
paragraph (a)(3)(i) of this section shall still be required to meet the
evaporative emission standards set forth in paragraphs Sec. 86.096-
10(b)(1)(i), (b)(2)(i) and (b)(3)(i).
(iii) The con fig u ra tions certified to the emission standards of
paragraphs (a)(1) (ii) and (iv) of this section under the provisions of
paragraphs (a)(3) (i) and (ii) of this section shall still be required
to meet the evaporative emission standards set forth in paragraphs
(b)(1)(i), (b)(2)(i), and (b)(3)(i) of this section.
(b) [Reserved]. For guidance see Sec. 86.096-10.
(c) No crankcase emissions shall be discharged into the ambient
atmosphere from any new 1998 or later model year Otto-cycle heavy-duty
engine.
(d) Every manufacturer of new motor vehicle engines subject to the
standards prescribed in this section shall, prior to taking any of the
actions specified in section 203(a)(1) of the Act, test or cause to be
tested motor vehicle engines in accordance with applicable procedures in
subpart N or P of this part to ascertain that such test engines meet the
requirements of paragraphs (a) and (c) of this section.
[58 FR 15800, Mar. 24, 1993, as amended at 59 FR 48501, Sept. 21, 1994;
62 FR 54716, Oct. 21, 1997; 65 FR 59955, Oct. 6, 2000]