4*1 f—Urrfted Sialcs
pKtl Environmental Pnjlettiiii'i
*Vau^cy
Office of Transportation and Air Quality
E PA-420- B-20-021
July 2020
Federal Marine Compression-Ignition (CI) Engines: Exhaust Emission Standards
Category a
Tier
Displace-
ment
(L/cylinder)
Powerc
(kW)
Speed
(rpm)
Model
Year
NOx
(g/kW-hr)
HC
(g/kW-hr)
HC+NOx d
(g/kW-hr)
PM
(g/kW-hr)
CO
(g/kW-hr)
Useful Life e
(years/hours)
Waranty Period f
(years/hours)
-
< 8
-
2000
-
-
10.5 (ABT)
1.0 (ABT)
8.0
5/3,000
2/1,500
C1
Commercial
1
-
8 < kW <19
-
2000
-
-
9.5 (ABT)
0.80 (ABT)
6.6
-
19 < kW< 37
-
1999
-
-
9.5 (ABT)
0.80 (ABT)
5.5
7/5,000
3.5/2,500
&
Recreational13
-
< 8
-
2005
-
-
7.5 (ABT)
0.80 (ABT)
8.0
5/3,000
2/1,500
2
-
8 < kW <19
-
2005
-
-
7.5 (ABT)
0.80 (ABT)
6.6
-
19 < kW< 37
-
2004
-
-
7.5 (ABT)
0.60 (ABT)
5.5
7/5,000
3.5/2,500
rpm <
130
17.0
-
-
-
-
1
>2.5
>37
130 < rpm
<2000
2004 h
45.0 x N "°-20'
-
-
-
-
10/10,000
5/5,000
C1
Commercial
rpm >
2000
9.8
-
-
-
disp < 0.9
>37
-
2005 h
-
-
7.5 (ABT)
0.40 (ABT)
5.0
0.9 < disp
< 1.2
-
2004 h
-
-
7.2 (ABT)
0.30 (ABT)
5.0
2
1.2 < disp
<2.5
All
-
2004 h
-
-
7.2 (ABT)
0.20 (ABT)
5.0
10/1,000
5/5,000
2.5 < disp
< 5.0
-
2007 h
-
-
7.2 (ABT)
0.20 (ABT)
5.0
rpm <
130
17.0
-
-
-
-
1
>2.5
>37
130 < rpm
<2000
2004
45.0 x N "°-20'
-
-
-
-
10/1,000
5/500
rpm >
2000
9.8
-
-
-
-
Recreational
disp < 0.9
>37
-
2007
-
-
7.5 (ABT)
0.40 (ABT)
5.0
2
0.9 < disp
< 1.2
-
2006
-
-
7.2 (ABT)
0.30 (ABT)
5.0
10/1,000
5/500
1.2 < disp
<2.5
All
-
2006
-
-
7.2 (ABT)
0.20 (ABT)
5.0
2.5 < disp
< 5.0
-
2009
-
-
7.2 (ABT)
0.20 (ABT)
5.0
Continued
-------
Category a
Tier
Displace-
ment
(L/cy Under)
Powerc
(kW)
Speed
(rpm)
Model
Year
NOx
(g/kW-hr)
HC
(g/kW-hr)
HC+NOx d
(g/kW-hr)
PM
(g/kW-hr)
CO
(g/kW-hr)
Useful Life e
(years/hours)
Waranty Period f
(years/hours)
< 8
-
2009+
-
-
7.5 (ABT)
0.40 (ABT)
8.0
Commercial:
5/3,000
for engines
Commercial:
2.5/1,500
for engines
8 < kW< 19
-
2009+
-
-
7.5 (ABT)
0.40 (ABT)
6.6
C1
19 < kW< 37
-
2009-
2013
-
-
7.5 J (ABT)
0.30 J (ABT)
5.5
< 19 kW
7/5,000
< 19 kW
3.5/2,500
Commercial
&
Recreational
< 75 kW
3
< 0.9
-
2014+
-
-
4.7 J (ABT)
0.30 J (ABT)
5.0
for engines
for engines
-
2009-
2013
-
-
7.5 J (ABT)
5.0
19 < kW < 37
10/10,000
19 < kW < 37
5/5,000
37 < kW < 75
-
2014+
-
-
4.7 J (ABT)
0.30 J (ABT)
5.0
for engines
37 < kW < 75
Recreational:
10/1,000
for engines
37 < kW < 75
Recreational:
5/500
< 0.9
>75
-
2012+
-
-
5.4 (ABT)
0.14 (ABT)
0.9 < disp
< 1.2
All
-
2013+
-
-
5.4 (ABT)
0.12 (ABT)
5/3,000
2.5/1,500
1.2 < disp
<2.5
<600
-
2014-
2017
-
5.6 (ABT)
0.11 (ABT)
8.0 for
< 8 kW
for
engines
for
engines
C1
-
2018+
-
0.10 (ABT)
6.6 for 8
< kW< 19
< 19 kW
< 19 kW
Commercial
Engines
with < 35
kW/L power
density k
>600
-
2014+
-
-
5.6 (ABT)
0.11 (ABT)
7/5,000
3.5/2,500
3 1
2.5 < disp
< 3.5
< 600
-
2013-
2017
-
5.6 (ABT)
0.11 (ABT)
5.5 for 19
for
engines
for
engines
-
2018+
-
0.10 (ABT)
< kW < 37
19 < kW< 37
19 < kW< 37
>600
-
2013+
-
-
5.6 (ABT)
0.11 (ABT)
5.0 for
10/10,000
5/5,000
3.5 < disp
< 7.0
< 600
-
2012-
2017
-
5.8 (ABT)
0.11 (ABT)
>37 kW
for engines
>37 kW
for engines
>37 kW
-
2018+
-
0.10 (ABT)
>600
-
2012+
-
-
5.8 (ABT)
0.11 (ABT)
< 0.9
>75
-
2012+
-
-
5.8 (ABT)
0.15 (ABT)
Commercial:
Commercial:
0.9 < disp
< 1.2
-
2013+
-
-
5.8 (ABT)
0.14 (ABT)
8.0 for <8
kW
6.6 for 8
5/3,000
for engines
< 19 kW
7/5,000
2.5/1,500
for engines
< 19 kW
3.5/2,500
C1
Commercial
Engines with
> 35 kW/L
power
density & All
Recreational
Engines k
1.2 < disp
<2.5
-
2014+
-
-
5.8 (ABT)
0.14 (ABT)
3 1
2.5 < disp
< 3.5
All
-
2013+
-
-
5.8 (ABT)
0.12 (ABT)
< kW< 19
for engines
19 < kW< 37
for engines
19 < kW< 37
3.5 < disp
< 7.0
-
2012+
-
-
5.8 (ABT)
0.11 (ABT)
5.5 for 19
< kW < 37
5.0 for
>37 kW
10/10,000
for engines
>37 kW
Recreational:
10/1,000
5/5,000
for engines
>37 kW
Recreational:
5/500
Continued
-------
Category a
Tier
Displace-
ment
(L/cylinder)
Powerc
(kW)
Speed
(rpm)
Model
Year
NOx
(g/kW-hr)
HC
(g/kW-hr)
HC+NOx d
(g/kW-hr)
PM
(g/kW-hr)
CO
(g/kW-hr)
Useful Life e
(years/hours)
Waranty Period f
(years/hours)
600 < kW
< 1,400
-
2017+
1.8 (ABT)
-
0.19 HC n
0.04 (ABT)
1,400 < kW
<2,000
-
2016+
1.8 (ABT)
-
0.19 HC n
0.04 (ABT)
C1
Commercial
4 m
< 7.0
2,000 < kW
< 3,700
-
2014+
1.8 (ABT)
-
0.19 HC n
0.04 (ABT)
5.0
10/10,000
5/5,000
>3,700
-
2014-
2015
1.8 (ABT)
-
0.19 HC n
0.12 (ABT)
-
2016+
1.8 (ABT)
-
0.19 HC n
0.06 (ABT)
rpm < 130
17.0
-
-
-
-
1
All
All
130 < rpm
<2,000
2004
45.0 x N "0 20i
-
-
-
-
10/20,000
5/10,000
rpm >
2,000
9.8
-
-
-
-
5.0 3,300
-
2007
-
-
9.8 (ABT)
0.50 (ABT)
5.0
10/20,000
5/10,000
C2
20.0 < disp
< 25.0
All
-
-
-
9.8 (ABT)
0.50 (ABT)
5.0
25.0 < disp
< 30.0
All
-
-
-
11.0 (ABT)
0.50 (ABT)
5.0
7.0 < disp
< 15.0
<2,000
-
-
-
6.2 (ABT)
0.14 (ABT)
5.0
2,000 < kW
< 3,700
-
2013+
-
-
7.8 (ABT)
0.14 (ABT)
5.0
3 °'P
15.0 < disp
< 20.0
<2,000
-
-
-
7.0 (ABT)
0.34 (ABT)
5.0
10/20,000
5/10,000
20.0 < disp
< 25.0
<2,000
-
2014+
-
-
9.8 (ABT)
0.27 (ABT)
5.0
25.0 < disp
< 30.0
<2,000
-
-
-
11.0 (ABT)
0.27 (ABT)
5.0
Continued
-------
Category a
Tier
Displace-
ment
(L/cylinder)
Powerc
(kW)
Speed
(rpm)
Model
Year
NOx
(g/kW-hr)
HC
(g/kW-hr)
HC+NOx d
(g/kW-hr)
PM
(g/kW-hr)
CO
(g/kW-hr)
Useful Life e
(years/hours)
Waranty Period f
(years/hours)
C2
4 m, p
All
600 < kW
< 1,400
-
2017+
1.8 (ABT)
-
0.19 HC n
0.04 (ABT)
5.0
10/20,000
5/10,000
All
1400 < kW
< 2,000
-
2016+
1.8 (ABT)
-
0.19 HC n
0.04 (ABT)
All
2,000 < kW
< 3,700
-
2014+
1.8 (ABT)
-
0.19 HC n
0.04 (ABT)
< 15.0
>3,700
-
2014-
2015
1.8 (ABT)
-
0.19 HC n
0.12 (ABT)
15.0 < disp
< 30.0
-
2014-
2015
1.8 (ABT)
-
0.19 HC n
0.25 (ABT)
All
-
2016+
1.8 (ABT)
-
0.19 HC n
0.06 (ABT)
C3
1
>30.0
All
rpm < 130
2004
17.0
-
-
-
-
3/10,000
3/10,000
130 < rpm
< 2,000
45.0 x N "a20i
-
-
-
-
rpm >
2,000
9.8
-
-
-
-
2
>30.0
All
rpm < 130
2011
14.4
2.0
-
-
5.0
3/10,000
3/10,000
130 < rpm
<2,000
44.0 x N "a23i
-
-
rpm >
2,000
7.7
-
-
3 r
>30.0
All
rpm < 130
2016
3.4
2.0
-
-
5.0
3/10,000
130 < rpm
<2,000
9.0 x N "a20i
-
-
rpm >
2,000
2.0
-
-
Continued
-------
Notes:
a Category 1 (C1) marine engines have a displacement less than 7.0 liters per cyl-
inder (L/cylinder); Category 2 (C2) marine engines have a displacement greater
than or equal to 7.0 L/cylinder and less than 30.0 L/cylinder; and Category 3 (C3)
marine engines have a displacement greater than or equal to 30.0 L/cylinder. For
Tier 1 and Tier 2, the line between Category 1 and Category 2 was set at 5.0 LI
cylinder rather than 7.0 L/cylinder.
b Tier 1 and Tier 2 standards for marine engines less than 37 kWwere adopted as
part of emission standards for land-based engines in part 89.
c For Tiers 1 and 2, this refers to the rated power; for Tiers 3 and 4, this refers to
the maximum engine power.
d Total hydrocarbon (THC) plus oxides of nitrogen (NOx) for Tier 2 standards.
e Useful life is expressed in hours or years, whichever comes first. A longer use-
ful life in hours for an engine family must be specified if either: 1) the engine is
designed, advertised, or marketed to operate longer than the minimum useful life;
or 2) the basic mechanical warranty is longer than the minimum useful life.
f Warranty period is expressed in years and hours, whichever comes first.
g Starting with Tier 3, if an engine uses a volatile liquid fuel, such as methanol,
the engine's fuel system and the vessel in which the engine is installed must
meet the evaporative emission requirements of 40 CFR part 1045 that apply with
respect to spark-ignition engines. Manufacturers subject to evaporative emission
standards must meet the requirements of 40 CFR 1045.112 as described in 40
CFR 1060.1(a)(2).
h Indicates the model years for which the specified standards start.
i N is the maximum test speed of the engine in revolutions per minute (rpm).
j Manufacturers of Tier 3 engines greater than or equal to 19 kW and less than
75 kW with displacement below 0.9 L/cylinder may alternatively certify some or
all of their engine families to a particulate matter (PM) emission standard of 0.20
grams per kilowatt-hour (g/kW-hr) and a NOx+HC emission standard of 5.8 g/kW-
hr for 2014 and later model years.
k The applicable Tier 2 NOx+HC standards continue to apply instead of the Tier 3
values for engines at or above 2000 kW.
I These Tier 3 standards apply to Category 1 engines below 3700 kW except for
recreational marine engines at or above 3700 kW (with any displacement), which
must meet the Tier 3 standards specified for recreational marine engines with a
displacement of 3.5 to 7.0 L/cylinder.
m The following provisions are optional: 1) Manufacturers may use NOx credits to
certify Tier 4 engines to a NOx+HC emission standard of 1.9 g/kW-hr instead of
the NOx and HC standards. See 40 CFR 1042.101 (a)(8)(i) for more details. 2)
For engines below 1000 kW, manufacturers may delay complying with the Tier 4
standards until October 1,2017. 3) For engines at or above 3700 kW, manufactur-
ers may delay complying with the Tier 4 standards until December 31, 2016.
n The Tier 4 standard is for HC (not HC+NOx) in g/kW-hr.
o These Tier 3 standards apply to Category 2 engines below 3700 kW; no Tier 3
standards apply for Category 2 engines at or above 3700 kW, although there are
Tier 4 standards that apply.
p An alternative set of Tier 3 and Tier 4 standards for PM, NOx, and HC are avail-
able for Category 2 engines at or above 1400 kW in model years 2012 through
2015, but they must be applied to all of a manufacturer's engines in a given dis-
placement category.
Tier
Maximum engine
power
Model year
PM
(g/kW-hr)
NOx
(g/kW-hr)
HC
(g/kW-hr)
3
kW> 1400
2012-2014
0.14
7.8 NOx+HC
4
1400 < kW< 3700
2015
0.04
1.8
0.19
kW > 3700
2015
0.06
1.8
0.19
q Interim Tier 4 PM standards apply for 2014 and 2015 model year Category 2
engines with per-cylinder displacement at or above 15.0 liters: 0.34 g/kW-hr for
engines 2000 = kW < 3300, and 0.27 g/kW-hr for engines 3300 = kW < 3700.
r Category 3 engines certifying to Tier 3 NOx standards must also comply with
mode cap standards. Measured NOx emissions may not exceed the applicable
NOx standard by a multiplier of 1.5 for applicable duty-cycle test modes. See
40 CFR 1042.104(c).
Code of Federal Regulations (CFR) Citations:
40 CFR 1042.101 and Appendix I = Exhaust emission standards and useful life for
C1 and C2 engines
40 CFR 1042.104 = Exhaust emission standards and useful life for C3 engines
40 CFR 1042.107 = Evaporative emission standards for marine CI engines
using methanol or any other volatile liquid fuel
40 CFR 1042.120 = Warranty periods corresponding to the standards in 40 CFR
Part 1042
40 CFR Part 1042, Subpart F = Test procedures for measuring emissions
relative to the emission standards in 40 CFR Part 1042
------- |