[Code of Federal Regulations]
[Title 40, Volume 18]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR94.8]
[Page 594-595]
TITLE 40--PROTECTION OF ENVIRONMENT
CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
PART 94--CONTROL OF EMISSIONS FROM MARINE COMPRESSION-IGNITION ENGINES--
Table of Contents
Subpart A--General Provisions for Emission Regulations for Compression-
Ignition Marine Engines
Sec. 94.8 Exhaust emission standards.
(a) The Tier 1 standards of paragraph (a)(1) of this section apply
until replaced by the standards of paragraph (a)(2) of this section.
(1) Tier 1 standards. NOX emissions from model year 2004
and later engines with displacement of 2.5 or more liters per cylinder
may not exceed the following values:
(i) 17.0 g/kW-hr when maximum test speed is less than 130 rpm.
(ii) 45.0 x N-0.20 when maximum test speed is at least
130 but less than 2000 rpm, where N is the maximum test speed of the
engine in revolutions per minute.
(Note: Round speed-dependent standards to the nearest 0.1 g/kW-hr.)
(iii) 9.8 g/kW-hr when maximum test speed is 2000 rpm or more.
(2) Tier 2 standards. (i) Exhaust emissions from marine compression-
ignition engines shall not exceed the applicable Tier 2 exhaust emission
standards contained in Table A-1 as follows:
Table A-1.--Primary Tier 2 Exhaust Emission Standards (G/kW-hr)
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THC+NOX g/kW-
Engine size liters/cylinder, rated power Category Model year \1\ hr CO g/kW-hr PM g/kW-hr
--------------------------------------------------------------------------------------------------------------------------------------------------------
disp. < 0.9 and power [ge] 37 kW.............. Category 1.............................. 2005 7.5 5.0 0.40
0.9 [le] disp. < 1.2, all power levels........ Category 1.............................. 2004 7.2 5.0 0.30
1.2 [le] disp. < 2.5, all power levels........ Category 1.............................. 2004 7.2 5.0 0.20
2.5 [le] disp. < 5.0, all power levels........ Category 1.............................. 2007 7.2 5.0 0.20
5.0 [le] disp. < 15.0, all power levels....... Category 2.............................. 2007 7.8 5.0 0.27
15.0 [le] disp. < 20.0 power, < 3300 kW....... Category 2.............................. 2007 8.7 5.0 0.50
15.0 [le] disp. < 20.0, power [ge] 3300 kW.... Category 2.............................. 2007 9.8 5.0 0.50
20.0 [le] disp. < 25.0, all power levels...... Category 2.............................. 2007 9.8 5.0 0.50
25.0 [le] disp. < 30.0, all power levels...... Category 2.............................. 2007 11.0 5.0 0.50
disp. [ge] 30.0, all power levels............. Category 3.............................. 2007 See paragraph (a)(2)(ii) of this section.
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\1\ The model years listed indicate the model years for which the specified standards start.
(ii) EPA has not finalized Tier 2 standards for Category 3 engines.
EPA will promulgate final Tier 2 standards for Category 3 engines on or
before April 27, 2007.
(b) Exhaust emissions of oxides of nitrogen, carbon monoxide,
hydrocarbon, and particulate matter (and other compounds, as applicable)
shall be measured using the procedures set forth in subpart B of this
part.
(c) In lieu of the THC+NOX standards, and PM standards
specified in paragraph (a) of this section, manufacturers may elect to
include engine families in the averaging, banking, and trading program,
the provisions of which are specified in subpart D of this part. The
manufacturer shall then set a family emission limit (FEL) which will
serve as the standard for that engine family. The ABT provisions of
subpart D of this part do not apply for Category 3 engines.
(d)(1) Naturally aspirated engines subject to the standards of this
section shall not discharge crankcase emissions into the ambient
atmosphere.
(2) For engines using turbochargers, pumps, blowers, or
superchargers for air induction, if the engine discharges crankcase
emissions into the ambient atmosphere in use, these crankcase emissions
shall be included in all exhaust emission measurements. This requirement
applies only for engines subject to hydrocarbon standards (e.g., THC
standards, NMHC standards, or THC+NOX standards).
[[Page 595]]
(3) The crankcase requirements of this paragraph (d) do not apply
for Tier 1 engines.
(e)(1) For Category 1 and Category 2 engines, exhaust emissions from
propulsion engines subject to the standards (or FELs) in paragraph (a),
(c), or (f) of this section shall not exceed:
(i) 1.20 times the applicable standards (or FELs) when tested in
accordance with the supplemental test procedures specified in
Sec. 94.106 at loads greater than or equal to 45 percent of the maximum
power at rated speed or 1.50 times the applicable standards (or FELs) at
loads less than 45 percent of the maximum power at rated speed; or
(ii) 1.25 times the applicable standards (or FELs) when tested over
the whole power range in accordance with the supplemental test
procedures specified in Sec. 94.106.
(2) [Reserved]
(f) The following define the requirements for low-emitting Blue Sky
Series engines:
(1) Voluntary standards. (i) Category 1 and Category 2 engines may
be designated ``Blue Sky Series'' engines by meeting the voluntary
standards listed in Table A-2, which apply to all certification and in-
use testing:
Table A-2.--Voluntary Emission Standards [g/kW-hr]
------------------------------------------------------------------------
Rated brake power (kW) THC+NOX PM
------------------------------------------------------------------------
Power [ge] 37 kW, and displ. < 0.9...... 4.0 0.24
0.9 [le] displ. < 1.2................... 4.0 0.18
1.2 [le] displ. < 2.5................... 4.0 0.12
2.5 [le] displ. < 5..................... 5.0 0.12
5 [le] displ. < 15...................... 5.0 0.16
15 [le] disp. < 20, and power < 3300 kW. 5.2 0.30
15 [le] disp. < 20, and power [ge] 3300 5.9 0.30
kW.....................................
20 [le] disp. < 25...................... 5.9 0.30
25 [le] disp. < 30...................... 6.6 0.30
------------------------------------------------------------------------
(ii) Category 3 engines may be designated ``Blue Sky Series''
engines by meeting these voluntary standards that would apply to all
certification and in-use testing:
(A) A NOX standard of 9.0 x N-\0.20\ where N =
the maximum test speed of the engine in revolutions per minute (or 4.8
g/kW-hr for engines with maximum test speeds less than 130 rpm). (Note:
Round speed-dependent standards to the nearest 0.1 g/kW-hr.)
(B) An HC standard of 0.4 g/kW-hr.
(C) A CO standard of 3.0 g/kW-hr.
(2) Additional standards. Blue Sky Series engines are subject to all
provisions that would otherwise apply under this part.
(3) Test procedures. Manufacturers may use an alternate procedure to
demonstrate the desired level of emission control if approved in advance
by the Administrator.
(g) Standards for alternative fuels. The standards described in this
section apply to compression-ignition engines, irrespective of fuel,
with the following two exceptions for Category 1 and Category 2 engines:
(1) Engines fueled with natural gas shall comply with
NMHC+NOX standards that are numerically equivalent to the
THC+NOX described in paragraph (a) of this section; and
(2) Engines fueled with alcohol fuel shall comply with
THCE+NOX standards that are numerically equivalent to the
THC+NOX described in paragraph (a) of this section.
[64 FR 73331, Dec. 29, 1999, as amended at 67 FR 68342, Nov. 8, 2002; 68
FR 9782, Feb. 28, 2003]