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Code of Federal Regulations (Last Updated: July 5, 2024) |
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Title 40 - Protection of Environment |
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Chapter I - Environmental Protection Agency |
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SubChapter U - Air Pollution Controls |
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Part 1042 - Control of Emissions from New and in-Use Marine Compression-Ignition Engines and Vessels |
Appendix III to Part 1042 - Not-to-Exceed Zones
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Appendix III to Part 1042 - Not-to-Exceed Zones
(a) The following definitions apply for this Appendix III:
(1) Percent power means the percentage of the maximum power achieved at Maximum Test Speed (or at Maximum Test Torque for constant-speed engines).
(2) Percent speed means the percentage of Maximum Test Speed.
(b) Figure 1 of this Appendix illustrates the default NTE zone for marine engines certified using the duty cycle specified in § 1042.505(b)(1), except for variable-speed propulsion marine engines used with controllable-pitch propellers or with electrically coupled propellers, as follows:
(1) Subzone 1 is defined by the following boundaries:
(i) Percent power ÷ 100 > 0.7 · (percent speed ÷ 100)2.5.
(ii) Percent power ÷ 100 ≤ (percent speed ÷ 90)3.5.
(iii) Percent power ÷ 100 ≥ 3.0 · (1−percent speed ÷ 100).
(2) Subzone 2 is defined by the following boundaries:
(i) Percent power ÷ 100 ≥ 0.7 · (percent speed ÷ 100)2.5.
(ii) Percent power ÷ 100 ≤ (percent speed ÷ 90)3.5.
(iii) Percent power ÷ 100 < 3.0 · (1−percent speed ÷ 100).
(iv) Percent speed ÷ 100 ≥ 0.7.
(c) Figure 2 of this Appendix illustrates the default NTE zone for recreational marine engines certified using the duty cycle specified in § 1042.505(b)(2), except for variable-speed marine engines used with controllable-pitch propellers or with electrically coupled propellers, as follows:
(1) Subzone 1 is defined by the following boundaries:
(i) Percent power ÷ 100 ≥ 0.7 · (percent speed ÷ 100)2.5.
(ii) Percent power ÷ 100 ≤ (percent speed ÷ 90)3.5.
(iii) Percent power ÷ 100 ≥ 3.0 · (1−percent speed ÷ 100).
(iv) Percent power ≤ 95 percent.
(2) Subzone 2 is defined by the following boundaries:
(i) Percent power ÷ 100 ≥ 0.7 · (percent speed ÷ 100)2.5.
(ii) Percent power ÷ 100 ≤ (percent speed ÷ 90)3.5.
(iii) Percent power ÷ 100 < 3.0 · (1−percent speed ÷ 100).
(iv) Percent speed ≥ 70 percent.
(3) Subzone 3 is defined by the following boundaries:
(i) Percent power ÷ 100 ≤ (percent speed ÷ 90)3.5.
(ii) Percent power > 95 percent.
(d) Figure 3 of this Appendix illustrates the default NTE zone for variable-speed marine engines used with controllable-pitch propellers or with electrically coupled propellers that are certified using the duty cycle specified in § 1042.505(b)(1), (2), or (3), as follows:
(1) Subzone 1 is defined by the following boundaries:
(i) Percent power ÷ 100 ≥ 0.7 · (percent speed ÷ 100)2.5.
(ii) Percent power ÷ 100 ≥ 3.0 · (1−percent speed ÷ 100).
(iii) Percent speed ≥ 78.9 percent.
(2) Subzone 2a is defined by the following boundaries:
(i) Percent power ÷ 100 ≥ 0.7 · (percent speed ÷ 100)2.5.
(ii) Percent speed ≥70 percent.
(iii) Percent speed <78.9 percent, for Percent power >63.3 percent.
(iv) Percent power ÷ 100 <3.0 · (1−percent speed ÷ 100), for Percent speed ≥78.9 percent.
(3) Subzone 2b is defined by the following boundaries:
(i) The line formed by connecting the following two points on a plot of speed-vs.-power:
(A) Percent speed = 70 percent; Percent power = 28.7 percent.
(B) Percent power = 40 percent; Speed = governed speed.
(ii) Percent power ÷ 100 < 0.7 · (percent speed ÷ 100)2.5.
(e) Figure 4 of this Appendix illustrates the default NTE zone for constant-speed engines certified using a duty cycle specified in § 1042.505(b)(3) or (4), as follows:
(1) Subzone 1 is defined by the following boundaries:
(i) Percent power ≥70 percent.
(ii) [Reserved]
(f) Figure 5 of this Appendix illustrates the default NTE zone for variable-speed auxiliary marine engines certified using the duty cycle specified in § 1042.505(b)5)(ii) or (iii), as follows:
(1) The default NTE zone is defined by the boundaries specified in 40 CFR 86.1370(b)(1), (2), and (4).
(2) A special PM subzone is defined in 40 CFR 1039.515(b).
[81 FR 74157, Oct. 25, 2016]