[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: 40CFR86.094-11]
[Page 243-244]
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. 86.094-11 Emission standards for 1994 and later model year diesel
heavy-duty engines and vehicles.
(a)(1) Exhaust emissions from new 1994 and later model year diesel
heavy-duty engines shall not exceed the following (optional for 1994
through 1996 model year new natural gas- and liquefied petroleum gas-
fueled heavy-duty engines):
(i)(A) Hydrocarbons (for diesel engines fueled with either
petroleum-fuel or liquefied petroleum gas). 1.3 grams per brake
horsepower-hour (0.48 gram per megajoule), as measured under transient
operating conditions.
(B) Total Hydrocarbon Equivalent (for methanol-fueled diesel
engines). 1.3 grams per brake horsepower-hour (0.48 gram per megajoule),
as measured under transient operating conditions.
(C) Nonmethane hydrocarbons (for natural gas-fueled diesel engines).
1.2 grams per brake horsepower-hour (0.45 gram per megajoule), as
measured under transient operating conditions.
(ii) Carbon monoxide. (A) 15.5 grams per brake horsepower-hour (5.77
grams per megajoule), as measured under transient operating conditions.
(B) 0.50 percent of exhaust gas flow at curb idle (methanol-,
natural gas- and liquefied petroleum gas-fueled diesel only).
(iii) Oxides of nitrogen. (A) 5.0 grams per brake horsepower-hour
(1.9 grams per megajoule), as measured under transient operating
conditions.
(B) A manufacturer may elect to include any or all of its diesel
heavy-duty engine families in any or all of the NOX
averaging, trading, or banking programs for heavy-duty engines, within
the restrictions described in Sec. 86.094-15. If the manufacturer
elects to include engine families in any of these programs, the
NOX FELs may not exceed 6.0 grams per brake horsepower-hour
(2.2 grams per megajoule). This ceiling value applies whether credits
for the family are derived from averaging, trading or banking programs.
(iv) Particulate. (A) For diesel engines to be used in urban buses,
0.07 gram per brake horsepower-hour (0.026 gram per megajoule), as
measured under transient operating conditions.
(B) For all other diesel engines only, 0.10 gram per brake
horsepower-hour (0.037 gram per megajoule), as measured under transient
operating conditions.
(C) A manufacturer may elect to include any or all of its diesel
heavy-duty engine families in any or all of the particulate averaging,
trading, or banking programs for heavy-duty engines, within the
restrictions described in Sec. 86.094-15. If the manufacturer elects to
include engine families in any of these programs, the particulate FEL
may not exceed:
(1) For engine families intended for use in urban buses, 0.25 gram
per brake horsepower-hour (0.093 gram per megajoule).
(2) For engine families not intended for use in urban buses, 0.60
gram per brake horsepower-hour (0.22 gram per megajoule).
(3) The ceiling values in paragraphs (a)(1)(iv)(C) (1) and (2) of
this section apply whether credits for the family are derived from
averaging, trading, or banking programs.
(b)(1) The opacity of smoke from new 1994 and later model year
diesel heavy-duty engines shall not exceed (optional for 1994 through
1996 model year gaseous-fueled diesel heavy-duty engines):
(i) 20 percent during the engine acceleration mode.
(ii) 15 percent during the engine lugging mode.
(iii) 50 percent during the peaks in either mode.
(2) The standards set forth in paragraph (b)(1) of this section
refer to exhaust smoke emissions generated
[[Page 244]]
under the conditions set forth in subpart I of this part and measured
and calculated in accordance with those procedures.
(3) Evaporative emissions (total of non-oxygenated hydrocarbons plus
methanol) from 1994 and later model year heavy-duty vehicles equipped
with methanol-fueled diesel engines shall not exceed:
(i) For vehicles with a Gross Vehicle Weight Rating of up to 14,000
lbs, 3.0 grams per test.
(ii) For vehicles with a Gross Vehicle Weight Rating of greater than
14,000 lbs, 4.0 grams per test.
(4)(i) For vehicles with a Gross Vehicle Weight Rating of up to
26,000 lbs, the standards set forth in paragraph (b)(3) of this section
refer to a composite sample of evaporative emissions collected under the
conditions set forth in subpart M and measured in accordance with those
procedures.
(ii) For vehicles with a Gross Vehicle Weight Rating of greater than
26,000 lbs, the standard set forth in paragraph (b)(3)(ii) of this
section refers to the manufacturers, engineering design evaluation using
good engineering practice (a statement of which is required in Sec.
86.091-23(b)(4)(ii)).
(c) No crankcase emissions shall be discharged into the ambient
atmosphere from any new 1994 or later model year methanol-fueled diesel,
or any naturally-aspirated diesel heavy-duty engine (optional for 1994
through 1996 model year natural gas- and liquefied petroleum gas-fueled
engines). For petroleum-, natural gas- and liquefied petroleum gas-
fueled engines only; this provision does not apply to engines using
turbochargers, pumps, blowers, or superchargers for air induction.
(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 I or N of this part to ascertain that such test engines meet the
requirements of paragraphs (a), (b), and (c) and (d) of this section.
(Secs. 202, 203, 206, 207, 208, 301a, Clean Air Act, as amended; 42
U.S.C. 7521, 7522, 7525, 7541, 7542, 7601a)
[50 FR 10654, Mar. 15, 1985, as amended at 54 FR 14466, Apr. 11, 1989;
57 FR 19538, May 7, 1992; 58 FR 15799, Mar. 24, 1993; 59 FR 48497, Sept.
21, 1994; 62 FR 47120, Sept. 5, 1997]