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Electronic Code of Federal Regulations

e-CFR data is current as of December 5, 2019

Title 40Chapter ISubchapter UPart 1042Subpart J → Appendix


Title 40: Protection of Environment
PART 1042—CONTROL OF EMISSIONS FROM NEW AND IN-USE MARINE COMPRESSION-IGNITION ENGINES AND VESSELS
Subpart J—Definitions and Other Reference Information


Appendix II to Part 1042— Steady-State Duty Cycles

(a) The following duty cycles apply as specified in §1042.505(b)(1):

(1) The following duty cycle applies for discrete-mode testing:

E3 mode No.Engine speed1Percent of
maximum
test power
Weighting
factors
1Maximum test speed1000.2
291%750.5
380%500.15
463%250.15

1Maximum test speed is defined in 40 CFR part 1065. Percent speed values are relative to maximum test speed.

(2) The following duty cycle applies for ramped-modal testing:

RMC
mode
Time in mode
(seconds)
Engine
speed1 3
Power
(percent)2 3
1a Steady-state229Maximum test speed100%.
1b Transition20Linear transitionLinear transition in torque.
2a Steady-state16663%25%.
2b Transition20Linear transitionLinear transition in torque.
3a Steady-state57091%75%.
3b Transition20Linear transitionLinear transition in torque.
4a Steady-state17580%50%.

1Maximum test speed is defined in 40 CFR part 1065. Percent speed is relative to maximum test speed.

2The percent power is relative to the maximum test power.

3Advance from one mode to the next within a 20 second transition phase. During the transition phase, command a linear progression from the torque setting of the current mode to the torque setting of the next mode, and simultaneously command a similar linear progression for engine speed if there is a change in speed setting.

(b) The following duty cycles apply as specified in §1042.505(b)(2):

(1) The following duty cycle applies for discrete-mode testing:

E5 mode No.Engine
speed1
Percent of
maximum
test power
Weighting
factors
1Maximum test speed1000.08
291%750.13
380%500.17
463%250.32
5Warm idle00.3

1Maximum test speed is defined in 40 CFR part 1065. Percent speed values are relative to maximum test speed.

(2) The following duty cycle applies for ramped-modal testing:

RMC
mode
Time in mode
(seconds)
Engine
speed1 3
Power
(percent)2 3
1a Steady-state167Warm idle0.
1b Transition20Linear transitionLinear transition in torque.
2a Steady-state85Maximum test speed100%.
2b Transition20Linear transitionLinear transition in torque.
3a Steady-state35463%25%.
3b Transition20Linear transitionLinear transition in torque.
4a Steady-state14191%75%.
4b Transition20Linear transitionLinear transition in torque.
5a Steady-state18280%50%.
5b Transition20Linear transitionLinear transition in torque.
6 Steady-state171Warm idle0.

1Maximum test speed is defined in 40 CFR part 1065. Percent speed is relative to maximum test speed.

2The percent power is relative to the maximum test power.

3Advance from one mode to the next within a 20 second transition phase. During the transition phase, command a linear progression from the torque setting of the current mode to the torque setting of the next mode, and simultaneously command a similar linear progression for engine speed if there is a change in speed setting.

(c) The following duty cycles apply as specified in §1042.505(b)(3):

(1) The following duty cycle applies for discrete-mode testing:

E2 mode No.Engine
speed1
Torque
(percent)2
Weighting
factors
1Engine Governed1000.2
2Engine Governed750.5
3Engine Governed500.15
4Engine Governed250.15

1Speed terms are defined in 40 CFR part 1065.

2The percent torque is relative to the maximum test torque as defined in 40 CFR part 1065.

(2) The following duty cycle applies for ramped-modal testing:

RMC modeTime in mode
(seconds)
Engine speedTorque
(percent)1 2
1a Steady-state229Engine Governed100%.
1b Transition20Engine GovernedLinear transition.
2a Steady-state166Engine Governed25%.
2b Transition20Engine GovernedLinear transition.
3a Steady-state570Engine Governed75%.
3b Transition20Engine GovernedLinear transition.
4a Steady-state175Engine Governed50%.

1The percent torque is relative to the maximum test torque as defined in 40 CFR part 1065.

2Advance from one mode to the next within a 20 second transition phase. During the transition phase, command a linear progression from the torque setting of the current mode to the torque setting of the next mode.

[81 FR 74156, Oct. 25, 2016]

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